Mercury Systems (MRCY) 10-K 15 Aug 19 2019 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2019	Jul. 31, 2019	Dec. 31, 2018
Document Documentand Entity Information [Abstract]
Title of 12(b) Security	Common Stock, Par Value $0.01 Per Share
Entity Incorporation, State or Country Code	MA
Document Transition Report	false
Document Annual Report	true
Document Type	10-K
Amendment Flag	false
Document Period End Date	Jun. 30, 2019
Entity File Number	0-23599
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Trading Symbol	MRCY
Entity Registrant Name	MERCURY SYSTEMS, INC
City Area Code	978
Local Phone Number	256-1300
Entity Central Index Key	0001049521
Current Fiscal Year End Date	--06-30
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		55,427,087
Entity Public Float			$ 2,300
Entity Tax Identification Number	04-2741391
Entity Address, Address Line One	50 Minuteman Road
Entity Address, Postal Zip Code	01810
Entity Address, City or Town	Andover
Entity Address, State or Province	MA
Security Exchange Name	NASDAQ

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
Current assets:
Cash and cash equivalents	$ 257,932	$ 66,521
Accounts receivable, net of allowance for doubtful accounts of $1,228 and $359 at June 30, 2019 and 2018, respectively	118,832	104,040
Unbilled receivables and cost in excess of billings	57,387	39,774
Inventory	137,112	108,585
Prepaid income taxes	90	3,761
Prepaid expenses and other current assets	10,819	9,062
Total current assets	582,172	331,743
Property and equipment, net	60,001	50,980
Goodwill	562,146	497,442
Acquired intangible assets, net	206,124	177,904
Other non-current assets	6,534	6,411
Total assets	1,416,977	1,064,480
Current liabilities:
Accounts payable	39,030	21,323
Accrued expenses	18,897	16,386
Accrued compensation	28,814	21,375
Deferred revenues and customer advances	11,291	12,596
Total current liabilities	98,032	71,680
Deferred income taxes	17,814	13,635
Income taxes payable	1,273	998
Secured Long-term Debt, Noncurrent	0	195,000
Other non-current liabilities	15,119	11,276
Total liabilities	132,238	292,589
Commitments and contingencies
Shareholders' equity:
Preferred stock, $0.01 par value; 1,000,000 shares authorized; no shares issued or outstanding	0	0
Common stock, $0.01 par value; 85,000,000 shares authorized; 54,247,532 and 46,924,238 shares issued and outstanding at June 30, 2019 and 2018, respectively	542	469
Additional paid-in capital	1,058,745	590,163
Retained earnings	226,743	179,968
Accumulated other comprehensive income	(1,291)	1,291
Total shareholders' equity	1,284,739	771,891
Total liabilities and shareholders' equity	$ 1,416,977	$ 1,064,480

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 83	$ 83
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	85,000,000	85,000,000
Common stock, shares issued	46,303,075	46,303,075
Common stock, shares outstanding	46,303,075	46,303,075

Consolidated Statements Of Oper

Consolidated Statements Of Operations And Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Net revenues	$ 654,744	$ 493,184	$ 408,588
Cost of revenues	368,588	267,326	217,045
Gross margin	286,156	225,858	191,543
Operating expenses:
Selling, general and administrative	110,717	88,365	76,491
Research and development	68,925	58,807	54,086
Amortization of intangible assets	27,914	26,004	19,680
Restructuring and other charges	560	3,159	1,952
Acquisition costs and other related expenses	1,456	2,538	1,931
Total operating expenses	209,572	178,873	154,140
Income from operations	76,584	46,985	37,403
Interest income	932	32	462
Interest expense	(9,109)	(2,850)	(7,568)
Other income, net	(8,880)	(1,594)	771
Income before income taxes	59,527	42,573	31,068
Tax provision	12,752	1,690	6,193
Net income	$ 46,775	$ 40,883	$ 24,875
Basic net earnings (loss) per share:
Basic net income per share (in dollars per share)	$ 0.98	$ 0.88	$ 0.59
Diluted net earnings (loss) per share:
Diluted net income per share (in dollars per share)	$ 0.96	$ 0.86	$ 0.58
Weighted-average shares outstanding:
Basic (in shares)	47,831	46,719	41,986
Diluted (in shares)	48,500	47,471	43,018
Comprehensive income:
Net income	$ 46,775	$ 40,883	$ 24,875
Foreign currency translation adjustments	(232)	(137)	(93)
Pension benefit plan, net of tax	(2,350)	354	220
Total other comprehensive (loss) income, net of tax	(2,582)	217	127
Total comprehensive income	$ 44,193	$ 41,100	$ 25,002

Consolidated Statements Of Shar

Consolidated Statements Of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income
Beginning Balance (in shares) at Jun. 30, 2016		38,675,000
Beginning Balance at Jun. 30, 2016	$ 473,044	$ 387	$ 357,500	$ 114,210	$ 947
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock incentive plans (in shares)		976,000
Issuance of common stock under employee stock incentive plans	2,756	$ 9	2,747
Issuance of common stock under employee stock purchase plan (in shares)		96,000
Issuance of common stock under employee stock purchase plan	2,214	$ 1	2,213
Stock Repurchased and Retired During Period, Shares		(344,000)
Stock Repurchased and Retired During Period, Value	(8,766)	$ (3)	(8,763)
Stock Issued During Period, Shares, New Issues		6,900,000
Stock Issued During Period, Value, New Issues	215,725	$ 69	215,656
Stock-based compensation	15,442		15,442
Net income	24,875			24,875
Share-based business combination consideration			0
Foreign currency translation adjustments	(93)				(93)
Pension benefit plan, net of tax	220				220
Ending Balance (in shares) at Jun. 30, 2017		46,303,000
Ending Balance at Jun. 30, 2017	725,417	$ 463	584,795	139,085	1,074
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock incentive plans (in shares)		868,000
Issuance of common stock under employee stock incentive plans	663	$ 8	655
Issuance of common stock under employee stock purchase plan (in shares)		82,000
Issuance of common stock under employee stock purchase plan	2,782	$ 1	2,781
Stock Repurchased and Retired During Period, Shares		(329,000)
Stock Repurchased and Retired During Period, Value	(15,508)	$ (3)	(15,505)
Stock-based compensation	17,437		17,437
Net income	40,883			40,883
Foreign currency translation adjustments	(137)				(137)
Pension benefit plan, net of tax	$ 354				354
Ending Balance (in shares) at Jun. 30, 2018	46,303,075	46,924,000
Ending Balance at Jun. 30, 2018	$ 771,891	$ 469	590,163	179,968	1,291
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock incentive plans (in shares)		478,000
Issuance of common stock under employee stock incentive plans	0	$ 5	(5)
Issuance of common stock under employee stock purchase plan (in shares)		102,000
Issuance of common stock under employee stock purchase plan	3,661	$ 1	3,660
Stock Repurchased and Retired During Period, Shares		(156,000)
Stock Repurchased and Retired During Period, Value	(7,968)	$ (2)	(7,966)
Stock Issued During Period, Shares, New Issues		6,900,000
Stock Issued During Period, Value, New Issues	453,573	$ 69	453,504
Stock-based compensation	19,389		19,389
Net income	46,775			46,775
Foreign currency translation adjustments	(232)				(232)
Pension benefit plan, net of tax	$ (2,350)				(2,350)
Ending Balance (in shares) at Jun. 30, 2019	46,303,075	54,248,000
Ending Balance at Jun. 30, 2019	$ 1,284,739	$ 542	$ 1,058,745	$ 226,743	$ (1,291)

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($)	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net income	$ 46,775,000	$ 40,883,000	$ 24,875,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	46,392,000	42,277,000	32,269,000
Stock-based compensation expense	19,422,000	17,314,000	15,341,000
Deferred income taxes	(1,557,000)	(5,464,000)	(7,841,000)
Non-cash interest expense	0	0	1,810,000
Other non-cash items	3,779,000	2,103,000	(626,000)
Changes in operating assets and liabilities, net of effects of businesses acquired:
Accounts receivable, unbilled receivable, and cost in excess of billings	(28,096,000)	(22,751,000)	(14,054,000)
Inventory	(17,101,000)	(16,230,000)	(9,318,000)
Prepaid income taxes	3,843,000	(2,327,000)	1,978,000
Prepaid expenses and other current assets	(1,075,000)	(361,000)	(1,270,000)
Other non-current assets	101,000	296,000	372,000
Accounts payable and accrued expenses	17,949,000	(5,267,000)	3,520,000
Deferred revenues and customer advances	(1,531,000)	6,035,000	(1,621,000)
Income taxes payable	3,152,000	(11,187,000)	9,622,000
Other non-current liabilities	44,000	(2,000,000)	4,089,000
Net cash provided by operating activities	97,517,000	43,321,000	59,146,000
Cash flows from investing activities:
Acquisition of businesses, net of cash acquired	(127,083,000)	(185,396,000)	(77,757,000)
Purchases of property and equipment	(26,691,000)	(15,106,000)	(32,844,000)
Other investing activities	0	(375,000)	(486,000)
Net cash used in investing activities	(153,774,000)	(200,877,000)	(111,087,000)
Cash flows from financing activities:
Proceeds from Issuance of Common Stock	454,343,000	0	215,725,000
Proceeds from employee stock plans	3,661,000	3,445,000	4,970,000
Stock Repurchased and Retired During Period, Value	(7,968,000)	(15,508,000)	(8,766,000)
Payments of term debt	(324,500,000)	(15,000,000)	(200,000,000)
Borrowings under credit facilities	129,500,000	210,000,000	0
Payments of Financing Costs	1,851,000	0	591,000
Net cash provided by financing activities	247,765,000	182,937,000	11,338,000
Effect of exchange rate changes on cash and cash equivalents	(97,000)	(497,000)	549,000
Net increase (decrease) in cash and cash equivalents	191,411,000	24,884,000	(40,054,000)
Cash and cash equivalents at beginning of year	66,521,000	41,637,000	81,691,000
Cash and cash equivalents at end of year	257,932,000	66,521,000	41,637,000
Cash paid during the period for:
Interest	10,368,000	1,607,000	5,758,000
Income taxes	7,351,000	17,004,000	2,834,000
Proceeds from Issuance or Sale of Equity	770,000	0	0
Payments for Derivative Instrument, Financing Activities	(5,420,000)	0	0
Derivative, Gain (Loss) on Derivative, Net	$ 5,420,000	$ 0	$ 0

Description of Business

Description of Business	12 Months Ended
	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business	Description of Business Mercury Systems, Inc. (the “Company” or “Mercury”) is a leading commercial provider of secure sensor and safety-critical mission processing subsystems. Headquartered in Andover, Massachusetts, the Company is delivering solutions that power a broad range of critical aerospace, defense and intelligence programs, configured and optimized for mission success in some of the most challenging and demanding environments. The Company's innovative next-generation defense electronics business model is designed to meet the industry’s current and emerging technology and business needs by delivering affordable state-of-the-art solutions, rapid time-to-value, service and support to the Company's defense prime contractor customers. The Company's products and solutions have been successfully deployed in more than 300 programs with over 25 different defense prime contractors, a testament to its deep domain expertise and culture of innovation. On May 20, 2019, the Company announced the commencement of an underwritten public offering of its common stock, par value $0.01 per share. On May 31, 2019 the Company closed the offering, including the full over-allotment allocation, selling an aggregate of 6,900 shares of common stock at a price to the public of $69.00 for total net proceeds of $454,343 . On April 18, 2019, the Company acquired The Athena Group, Inc. (“Athena”) and Syntonic Microwave LLC (“Syntonic”) on a cash-free, debt-free basis for a combined total purchase price of $46,000 , prior to net working capital and net debt adjustments. Athena was a privately-held company based in Gainesville, Florida and a leading provider of cryptographic and countermeasure IP vital to securing defense computing systems. Syntonic was a privately held company based in Campbell, California and a leading provider of advanced synthesizers, wideband phase coherent tuners and microwave converters optimized for signals intelligence and electronic intelligence applications demanding frequency coverage up to 40 GHz with 2 GHz instantaneous bandwidth. On January 29, 2019, the Company acquired GECO Avionics, LLC (“GECO”) on a cash-free, debt-free basis for a total purchase price of $36,500 . Based in Mesa, Arizona, GECO has over twenty years of experience designing and manufacturing affordable safety-critical avionics and mission computing solutions. On July 31, 2018, the Company acquired Germane Systems, LC (“Germane”) on a cash-free, debt-free basis for a total purchase price of $45,000 , prior to net working capital and net debt adjustments. Based in Chantilly, Virginia, Germane is an industry leader in the design, development and manufacturing of rugged servers, computers and storage systems for command, control and intelligence (“C2I”) applications. On February 1, 2018, the Company acquired Themis Computer (“Themis”) on a cash-free, debt-free basis for a total purchase price of approximately $180,000 , prior to net working capital and net debt adjustments. Based in Fremont, California, Themis is a leading designer, manufacturer and integrator of commercial, SWaP-optimized rugged servers, computers and storage systems for U.S. and international defense programs. The acquisition of Themis is consistent with the Company's strategy and will expand its position in the Command, Control, Communications, Computers, and Intelligence (“C4I”) market.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies P RINCIPLES OF C ONSOLIDATION The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany transactions and balances have been eliminated. U SE OF E STIMATES The preparation of financial statements in conformity with Generally Accepted Accounting Principles (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the dates of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from those estimates. B USINESS C OMBINATIONS The Company utilizes the acquisition method of accounting under ASC 805, Business Combinations, (“ASC 805”), for all transactions and events which it obtains control over one or more other businesses, to recognize the fair value of all assets and liabilities acquired, even if less than one hundred percent ownership is acquired, and in establishing the acquisition date fair value as of the measurement date for all assets and liabilities assumed. The Company also utilizes ASC 805 for the initial recognition and measurement, subsequent measurement and accounting, and disclosure of assets and liabilities arising from contingencies in business combinations. Other estimates include: • estimated step-ups for fixed assets and inventory; • estimated fair values of intangible assets; and • estimated income tax assets and liabilities assumed from the acquiree. While the Company uses its best estimates and assumptions as part of the purchase price allocation process to accurately value assets acquired and liabilities assumed at the business acquisition date, the estimates and assumptions are inherently uncertain and subject to refinement. As a result, during the purchase price allocation period, which is generally one year from the business acquisition date, the Company records adjustments to the assets acquired and liabilities assumed, with the corresponding offset to goodwill. For changes in the valuation of intangible assets between the preliminary and final purchase price allocation, the related amortization is adjusted in the period it occurs. Subsequent to the purchase price allocation period, any adjustment to assets acquired or liabilities assumed is included in operating results in the period in which the adjustment is determined. D ERIVATIVES The Company records the fair value of its derivative financial instruments in its condensed consolidated financial statements in other non-current assets or other non-current liabilities depending on their net position, regardless of the purpose or intent for holding the derivative contract. Changes in the fair value of the derivative financial instruments are either recognized periodically in earnings or in shareholders’ equity as a component of other comprehensive (loss) income (“OCI”). Changes in the fair value of cash flow hedges that qualify for hedge accounting treatment are recorded in OCI and reclassified into earnings in the same line item on the Consolidated Statements of Operations and Comprehensive Income as the impact of the hedged transaction when the underlying contract matures and, for interest rate exposure derivatives, over the term of the corresponding debt instrument. Changes in the fair values of derivatives not qualifying for hedge accounting are reported in earnings as they occur. The Company had no outstanding derivative instruments as of June 30, 2019 and 2018. R EVENUE R ECOGNITION The Company recognizes revenue in accordance with ASC 606, Revenue from Contracts with Customers , (“ASC 606”), which was adopted on July 1, 2018, using the retrospective method. Revenue is recognized in accordance with the five step model set forth by ASC 606, which involves identification of the contract(s), identification of performance obligations in the contract, determination of the transaction price, allocation of the transaction price to the previously identified performance obligations, and revenue recognition as the performance obligations are satisfied. The adoption of ASC 606 did not have a material impact to the amount or timing of revenue recognition related to the Company's legacy accounting methods for contracts including ship and bill, multiple-deliverable, and contract accounting. Such adoption did not have a material impact, individually or in the aggregate, to any amounts in the Company's Consolidated Balance Sheets, Consolidated Statements of Operations and Comprehensive Income, Consolidated Statements of Shareholders’ Equity or Consolidated Statements of Cash Flows. Refer to Note P for disaggregation of revenue for the period. During step one of the five step model, the Company considers whether contracts should be combined or segmented, and based on this assessment, the Company combines closely related contracts when all the applicable criteria are met. The combination of two or more contracts requires judgment in determining whether the intent of entering into the contracts was effectively to enter into a single contract, which should be combined to reflect an overall profit rate. Similarly, the Company may separate an arrangement, which may consist of a single contract or group of contracts, with varying rates of profitability, only if the applicable criteria are met. Judgment also is involved in determining whether a single contract or group of contracts may be segmented based on how the arrangement and the related performance criteria were negotiated. The decision to combine a group of contracts or segment a contract could change the amount of revenue and gross profit recorded in a given period. A performance obligation is a promise in a contract to transfer a distinct good or service to the customer. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue when the performance obligation is satisfied. Certain contracts with customers require the Company to perform tests of its products prior to shipment to ensure their performance complies with the Company’s published product specifications and, on occasion, with additional customer-requested specifications. In these cases, the Company conducts such tests and, if they are completed successfully, includes a written confirmation with each order shipped. As a result, at the time of each product shipment, the Company believes that no further customer testing requirements exist and that there is no uncertainty of acceptance by its customer. The Company's contracts with customers generally do not include a right of return relative to delivered products. In certain cases, contracts are modified to account for changes in the contract specifications or requirements. In most instances, contract modifications are accounted for as part of the existing contract. Certain contracts with customers have options for the customer to acquire additional goods or services. In most cases the pricing of these options are reflective of the standalone selling price of the good or service. These options do not provide the customer with a material right and are accounted for only when the customer exercises the option to purchase the additional goods or services. If the option on the customer contract was not indicative of the standalone selling price of the good or service, the material right would be accounted for as a separate performance obligation. The Company is a leading provider of secure sensor and safety-critical mission processing subsystems. Revenues are derived from the sales of products that are grouped into one of the following three categories: (i) components; (ii) modules and sub-assemblies; and (iii) integrated subsystems. The Company also generates revenues from the performance of services, including systems engineering support, consulting, maintenance and other support, testing and installation. Each promised good or service within a contract is accounted for separately under the guidance of ASC 606 if they are distinct, i.e., if a good or service is separately identifiable from other items in the contract and if a customer can benefit from it on its own or with other resources that are readily available to the customer. Promised goods or services not meeting the criteria for being a distinct performance obligation are bundled into a single performance obligation with other goods or services that together meet the criteria for being distinct. The appropriate allocation of the transaction price and recognition of revenue is then determined for the bundled performance obligation. Once the Company identifies the performance obligations, the Company then determines the transaction price, which includes estimating the amount of variable consideration to be included in the transaction price, if any. Variable consideration typically arises due to volume discounts, or other provisions that can either decrease or increase the transaction price. To the extent the transaction price includes variable consideration, the Company estimates the amount of variable consideration that should be included in the transaction price utilizing either the expected value method or the most likely amount method depending on the method the Company expects to better predict the amount of consideration to which it will be entitled. The determination of the estimates for variable consideration require judgment, and are based on past history with similar contracts and anticipated performance. Further, variable consideration is only included in the determination of the transaction price if it is probable that a significant reversal in the amount of revenue recognized will not occur. There are no constraints on the variable consideration recorded. For contracts with multiple performance obligations, the transaction price is allocated to each performance obligation using the standalone selling price of each distinct good or service in the contract. Standalone selling prices of the Company’s goods and services are generally not directly observable. Accordingly, the primary method used to estimate standalone selling price is the expected cost plus a margin approach, under which the Company forecasts the expected costs of satisfying a performance obligation and then adds an appropriate margin for that distinct good or service. The objective of the expected cost plus a margin approach is to determine the price at which the Company would transact if the product or service were sold by the Company on a standalone basis. The Company's determination of the expected cost plus a margin approach involves the consideration of several factors based on the specific facts and circumstances of each contract. Specifically, the Company considers the cost to produce the deliverable, the anticipated margin on that deliverable, the selling price and profit margin for similar parts, the Company’s ongoing pricing strategy and policies, often based on the price list established and updated by management on a regular basis, the value of any enhancements that have been built into the deliverable and the characteristics of the varying markets in which the deliverable is sold. The Company analyzes the standalone selling prices used in its allocation of transaction price on contracts at least annually. Standalone selling prices will be analyzed on a more frequent basis if a significant change in the Company’s business necessitates a more frequent analysis or if the Company experiences significant variances in its selling prices. Revenue recognized at a point in time generally relates to contracts that include a combination of components, modules and sub-assemblies, integrated subsystems and related system integration or other services. Contracts with distinct performance obligations recognized at a point in time, with or without an allocation of the transaction price, totaled 77% , 79% and 77% of revenues in the years ended June 30, 2019, 2018, and 2017, respectively. Revenue is recognized at a point in time for these products and services (versus over time recognition) due to the following: (i) customers are only able to consume the benefits provided by the Company upon completion of the product or service; (ii) customers do not control the product or service prior to completion; and (iii) the Company does not have an enforceable right to payment at all times for performance completed to date. Accordingly, there is little judgment in determining when control of the good or service transfers to the customer, and revenue is generally recognized upon shipment (for goods) or completion (for services). The Company engages in long-term contracts for development, production and service activities and recognizes revenue for performance obligations over time. These long-term contracts involve the design, development, manufacture, or modification of complex modules and sub-assemblies or integrated subsystems and related services. Revenue is recognized over time, due to the fact that: (i) the Company’s performance creates or enhances an asset that the customer controls as the asset is created or enhanced; and (ii) the Company’s performance creates an asset with no alternative use to the Company and the Company has an enforceable right to payment for performance completed to date. The Company considers the nature of these contracts and the types of products and services provided when determining the proper accounting for a particular contract. These contracts include both fixed-price and cost reimbursable contracts. The Company’s cost reimbursable contracts typically include cost-plus fixed fee and time and material (“T&M”) contracts. For long-term contracts, the Company typically leverages the input method, using a cost-to-cost measure of progress. The Company believes that this method represents the most faithful depiction of the Company’s performance because it directly measures value transferred to the customer. Contract estimates and estimates of any variable consideration are based on various assumptions to project the outcome of future events that may span several years. These assumptions include: the amount of time to complete the contract, including the assessment of the nature and complexity of the work to be performed; the cost and availability of materials; the availability of subcontractor services and materials; and the availability and timing of funding from the customer. The Company bears the risk of changes in estimates to complete on a fixed-price contract which may cause profit levels to vary from period to period. For cost reimburseable contracts, the Company is reimbursed periodically for allowable costs and is paid a portion of the fee based on contract progress. In the limited instances where the Company enters into T&M contracts, revenue recognized reflects the number of direct labor hours expended in the performance of a contract multiplied by the contract billing rate, as well as reimbursement of other direct billable costs. For T&M contracts, the Company elected to use a practical expedient permitted by ASC 606 whereby revenue is recognized in the amount for which the Company has a right to invoice the customer based on the control transferred to the customer. For all types of contracts, the Company recognizes anticipated contract losses as soon as they become known and estimable. Accounting for long-term contracts requires significant judgment relative to estimating total contract revenues and costs, in particular, assumptions relative to the amount of time to complete the contract, including the assessment of the nature and complexity of the work to be performed. The Company’s estimates are based upon the professional knowledge and experience of its engineers, program managers and other personnel, who review each long-term contract monthly to assess the contract’s schedule, performance, technical matters and estimated cost at completion. Changes in estimates are applied retrospectively and when adjustments in estimated contract costs are identified, such revisions may result in current period adjustments to earnings applicable to performance in prior periods. Total revenue recognized under long-term contracts over time was 23% , 21% and 23% of revenues in the years ended June 30, 2019, 2018, and 2017, respectively. The Company generally does not provide its customers with rights of product return other than those related to assurance warranty provisions that permit repair or replacement of defective goods over a period of 12 to 36 months . The Company accrues for anticipated warranty costs upon product shipment. The Company does not consider activities related to such assurance warranties, if any, to be a separate performance obligation. The Company does offer separately priced extended warranties which generally range from 12 to 36 months that are treated as separate performance obligations. The transaction price allocated to extended warranties is recognized over time in proportion to the costs expected to be incurred in satisfying the obligations under the contract. On long-term contracts, the portion of the payments retained by the customer is not considered a significant financing component because most contracts have a duration of less than one year and payment is received as progress is made. Many of the Company's long-term contracts have milestone payments, which align the payment schedule with the progress towards completion on the performance obligation. On some contracts, the Company may be entitled to receive an advance payment, which is not considered a significant financing component because it is used to facilitate inventory demands at the onset of a contract and to safeguard the Company from the failure of the other party to abide by some or all of their obligations under the contract. All revenues are reported net of government assessed taxes (e.g., sales taxes or value-added taxes). C OSTS TO O BTAIN AND F ULFILL A C ONTRACT The Company has elected to use a practical expedient available under ASC 606 whereby sales commissions are expensed as incurred for contracts where the amortization period would have been one year or less. The Company has not deferred sales commissions for contracts where the amortization period is greater than one year because such amounts that would qualify for deferral are not significant. The Company has elected to treat shipping and handling activities performed after the customer has obtained control of the related goods as a fulfillment cost. Such costs are accrued for in conjunction with the recording of revenue for the goods and are classified as cost of revenues. C ONTRACT B ALANCES Contract balances result from the timing of revenue recognized, billings and cash collections, and the generation of contract assets and liabilities. Contract assets represent revenue recognized in excess of amounts invoiced to the customer and the right to payment is not subject to the passage of time. Contract assets are presented as unbilled receivables and costs in excess of billings on the Company’s Consolidated Balance Sheets. Contract liabilities consist of deferred product revenue, billings in excess of revenues, deferred service revenue, and customer advances. Deferred product revenue represents amounts that have been invoiced to customers, but are not yet recognizable as revenue because the Company has not satisfied its performance obligations under the contract. Billings in excess of revenues represents milestone billing contracts where the billings of the contract exceed recognized revenues. Deferred service revenue primarily represents amounts invoiced to customers for annual maintenance contracts or extended warranty contracts, which are recognized over time in proportion to the costs expected to be incurred in satisfying the obligations under the contract. Customer advances represent deposits received from customers on an order. Contract liabilities are included in deferred revenue and the long-term portion of deferred revenue is included within other non-current liabilities on the Company’s Consolidated Balance Sheets. Contract balances are reported in a net position on a contract-by-contract basis. The contract asset balances were $57,387 and $39,774 as of June 30, 2019 and 2018, respectively. The contract asset balance increased due to growth in revenue recognized under long-term contracts over time during the year ended June 30, 2019. The contract liability balances were $12,362 and $13,425 as of June 30, 2019 and 2018, respectively. These balances remained consistent period over period. Revenue recognized during fiscal 2019 that was included in the contract liability balance at June 30, 2018 was $10,513 . R EMAINING P ERFORMANCE O BLIGATIONS The Company has elected to use a practical expedient available under ASC 606 whereby contracts with original expected durations of one year or less are excluded from the remaining performance obligations, while these contracts are included within backlog. The Company includes in its computation of remaining performance obligations customer orders for which it has accepted signed sales orders. The definition of remaining performance obligations excludes those contracts that provide the customer with the right to cancel or terminate the order with no substantial penalty, even if the Company’s historical experience indicates the likelihood of cancellation or termination is remote. As of June 30, 2019, the aggregate amount of the transaction price allocated to remaining performance obligations was $186,066 . The Company expects to recognize approximately 61% of its remaining performance obligations as revenue in the next 12 months and the balance thereafter. C ASH AND C ASH E QUIVALENTS Cash equivalents, consisting of highly liquid money market funds and U.S. government and U.S. government agency issues with original maturities of 90 days or less at the date of purchase, are carried at fair market value which approximates cost. F AIR V ALUE OF F INANCIAL I NSTRUMENTS The Company measures at fair value certain financial assets and liabilities, including cash equivalents, restricted cash and contingent consideration. ASC 820, Fair Value Measurement and Disclosures , specifies a hierarchy of valuation techniques based on whether the inputs to those valuation techniques are observable or unobservable. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect the Company’s market assumptions. These two types of inputs have created the following fair-value hierarchy: Level 1—Quoted prices for identical instruments in active markets; Level 2—Quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets; and Level 3—Valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable. C ONCENTRATION OF C REDIT R ISK Financial instruments that potentially expose the Company to concentrations of credit risk consist principally of cash, cash equivalents and accounts receivable. The Company places its cash and cash equivalents with financial institutions of high credit quality. At June 30, 2019 and 2018 , the Company had $257,932 and $66,521 , respectively, of cash and cash equivalents on deposit or invested with its financial and lending institutions. The Company provides credit to customers in the normal course of business. The Company performs ongoing credit evaluations of its customers’ financial condition and limits the amount of credit extended when deemed necessary. At June 30, 2019 , five customers accounted for 56% of the Company's accounts receivable, unbilled receivables and costs in excess of billings. At June 30, 2018 , five customers accounted for 54% of the Company’s accounts receivable, unbilled receivables and costs in excess of billings. I NVENTORY Inventory is stated at the lower of cost (first-in, first-out) or net realizable value, and consists of materials, labor and overhead. On a quarterly basis, the Company evaluates inventory for net realizable value. Once an item is written down, the value becomes the new inventory cost basis. The Company reduces the value of inventory for excess and obsolete inventory, consisting of on-hand and non-cancelable on-order inventory in excess of estimated usage. The excess and obsolete inventory evaluation is based upon assumptions about future demand, product mix and possible alternative uses. S EGMENT I NFORMATION The Company uses the management approach for segment disclosure, which designates the internal organization that is used by management for making operating decisions and assessing performance as the source of its reportable segments. The Company manages its business on the basis of one reportable segment, as a leading commercial provider of secure sensor and safety critical mission processing subsystems for a broad range of critical aerospace, defense and intelligence programs. G OODWILL AND I NTANGIBLE A SSETS Goodwill is the amount by which the cost of the net assets obtained in a business acquisition exceeded the fair values of the net identifiable assets on the date of purchase (see Note G). Goodwill is not amortized in accordance with the requirements of ASC 350, Intangibles-Goodwill and Other (“ASC 350”). Goodwill is assessed for impairment at least annually, on a reporting unit basis, or when events and circumstances occur indicating that the recorded goodwill may be impaired. If the book value of a reporting unit exceeds its fair value, the implied fair value of goodwill is compared with the carrying amount of goodwill. If the carrying amount of goodwill exceeds the implied fair value, an impairment loss is recorded in an amount equal to that excess. Intangible assets result from the Company’s various business acquisitions (see Note H) and certain licensed technologies, and consist of identifiable intangible assets, including completed technology, licensing agreements, patents, customer relationships, trademarks, backlog, and non-compete agreements. Intangible assets are reported at cost, net of accumulated amortization and are either amortized on a straight-line basis over their estimated useful lives of up to 12.5 years or over the period the economic benefits of the intangible asset are consumed. L ONG - LIVED A SSETS Long-lived assets primarily include property and equipment and acquired intangible assets. The Company regularly evaluates its long-lived assets for events and circumstances that indicate a potential impairment in accordance with ASC 360, Property, Plant, and Equipment (“ASC 360”). The Company reviews long-lived assets for impairment whenever events or changes in business circumstances indicate that the carrying amount of the assets may not be fully recoverable or that the useful lives of these assets are no longer appropriate. Each impairment test is based on a comparison of the estimated undiscounted cash flows of the asset as compared to the recorded value of the asset. If impairment is indicated, the asset is written down to its estimated fair value. Property and equipment are the long-lived, physical assets of the Company acquired for use in the Company’s normal business operations and are not intended for resale by the Company. These assets are recorded at cost. Renewals and betterments that increase the useful lives of the assets are capitalized. Repair and maintenance expenditures that increase the efficiency of the assets are expensed as incurred. Equipment under capital lease is recorded at the present value of the minimum lease payments required during the lease period. Depreciation is based on the estimated useful lives of the assets using the straight-line method (see Note F). As assets are retired or sold, the related cost and accumulated depreciation are removed from the accounts and any resulting gain or loss is included in the results of operations. Expenditures for major software purchases and software developed for internal use are capitalized and depreciated using the straight-line method over the estimated useful lives of the related assets, which are generally three years . For software developed for internal use, all external direct costs for material and services and certain payroll and related fringe benefit costs are capitalized in accordance with ASC 350. During fiscal 2019 , 2018 and 2017 , the Company capitalized $749 , $733 and $508 of software development costs. I NCOME T AXES The Company accounts for income taxes under ASC 740, Income Taxes (“ASC 740”). The Company recognizes deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the Company’s consolidated financial statements. Under this method, deferred tax assets and liabilities are determined based on the difference between the financial statement and tax basis of assets and liabilities using enacted tax rates for the year in which the differences are expected to reverse. The Company records a valuation allowance against net deferred tax assets if, based upon the available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized. ASC 740 requires a two-step approach to recognizing and measuring uncertain tax positions. First, the tax position must be evaluated to determine the likelihood that it will be sustained upon external examination. If the tax position is deemed more-likely-than-not to be sustained, the tax position is then assessed to determine the amount of benefit to recognize in the financial statements. The amount of the benefit that may be recognized is the largest amount that has a greater than 50% likelihood of being realized upon ultimate settlement. The Company recognizes interest and penalties accrued on any unrecognized tax benefits as a component of income tax expense. P RODUCT W ARRANTY A CCRUAL The Company’s product sales generally include a 12 to 36 month standard hardware warranty. At time of product shipment, the Company accrues for the estimated cost to repair or replace potentially defective products. Estimated warranty costs are based upon prior actual warranty costs for substantially similar transactions and any specifically identified warranty requirements. Product warranty accrual is included as part of accrued expenses in the accompanying consolidated balance sheets. The following table presents the changes in the Company's product warranty accrual. Fiscal Fiscal Fiscal Beginning balance at July 1, $ 1,336 $ 1,691 $ 1,523 Warranty assumed from Germane 169 — — Warranty assumed from Themis — 117 — Warranty assumed from CES — — 176 Warranty assumed from Delta — — 30 Accruals for warranties issued during the period 2,274 1,318 1,328 Settlements made during the period (1,909 ) (1,790 ) (1,366 ) Ending balance at June 30, $ 1,870 $ 1,336 $ 1,691 R ESEARCH AND D EVELOPMENT C OSTS Research and development costs are expensed as incurred. Research and development costs are primarily made up of labor charges and prototype material and development expenses. S TOCK - BASED C OMPENSATION Stock-based compensation cost is measured at the grant date based on the fair value of the award and is recognized as expense over the requisite service period, which generally represents the vesting period, and includes an estimate of the awards that will be forfeited. Stock-based compensation expense for the Company’s performance-based restricted stock awards are amortized over the requisite service period using graded vesting. The Company’s other restricted stock awards recognize expense over the requisite service period on a straight-line basis. The Company uses the Black-Scholes valuation model for estimating the fair value on the date of grant of stock options. R ETIREMENT OF C OMMON S TOCK Stock that is repurchased or received in connection with the exercise of stock options or in order to cover tax payment obligations triggered by exercise of stock options or the vesting of restricted stock is retired immediately upon the Company’s repurchase. The Company accounts for this under the cost method and upon retirement the excess amount over par value is charged against additional paid-in capital. N ET E ARNINGS P ER S HARE Basic net earnings per share is calculated by dividing net income by the weighted-average number of common shares

Acquisitions

Acquisitions	12 Months Ended
	Jun. 30, 2019
Business Combinations [Abstract]
Acquisitions	Acquisitions T HE A THENA G ROUP A CQUISITION On April 18, 2019, the Company acquired The Athena Group, Inc. (“Athena”). Athena was a privately-held company based in Gainesville, Florida and a leading provider of cryptographic and countermeasure IP vital to securing defense computing systems. The Company acquired Athena for an all cash purchase price of $34,000 , prior to net working capital and net debt adjustments, which was funded through the revolving credit facility (“the Revolver”). The following table presents the net purchase price and the fair values of the assets and liabilities of Athena on a preliminary basis: Amounts Consideration transferred Cash paid at closing $ 34,049 Working capital and net debt adjustment (446 ) Less cash acquired (49 ) Net purchase price $ 33,554 Estimated fair value of tangible assets acquired and liabilities assumed Cash $ 49 Accounts receivable 726 Fixed assets 74 Other current and non-current assets 260 Accounts payable (48 ) Accrued expenses (143 ) Other current and non-current liabilities (600 ) Deferred tax liability (6,414 ) Estimated fair value of net tangible liabilities acquired (6,096 ) Estimated fair value of identifiable intangible assets 23,700 Estimated goodwill 15,999 Estimated fair value of net assets acquired 33,603 Less cash acquired (49 ) Net purchase price $ 33,554 The amounts above represent the preliminary fair value estimates as of June 30, 2019 and are subject to subsequent adjustment as the Company obtains additional information during the measurement period and finalizes its fair value estimates. The preliminary identifiable intangible asset estimate includes completed technology of $23,700 with a useful life of 11 years. Any subsequent adjustments to these fair value estimates occurring during the measurement period will result in an adjustment to goodwill. The goodwill of $15,999 largely reflects the potential synergies and expansion of the Company's offerings across product lines and markets complementary to the Company's existing products and markets. The goodwill from this acquisition is reported under the Mercury Defense Systems (“MDS”) reporting unit. The Company has not furnished pro forma information relating to Athena because such information is not material to the Company's financial results. The revenues and loss before income taxes from Athena included in the Company's consolidated results for the fiscal year ended June 30, 2019 were $1,071 and $93 , respectively. The Athena results include expenses resulting from purchase accounting which include amortization of intangible assets. S YNTONIC M ICROWAVE LLC A CQUISITION On April 18, 2019, the Company acquired Syntonic Microwave LLC (“Syntonic”). Syntonic was a privately held company based in Campbell, California and a leading provider of advanced synthesizers, wideband phase coherent tuners and microwave converters optimized for signals intelligence and electronic intelligence applications demanding frequency coverage up to 40 GHz with 2 GHz instantaneous bandwidth. The Company acquired Syntonic for an all cash purchase price of $12,000 , prior to net working capital and net debt adjustments, which was funded through the Revolver. The following table presents the net purchase price and the fair values of the assets and liabilities of Syntonic on a preliminary basis: Amounts Consideration transferred Cash paid at closing $ 13,118 Less cash acquired (1,118 ) Net purchase price $ 12,000 Estimated fair value of tangible assets acquired and liabilities assumed Cash $ 1,118 Accounts receivable 281 Inventory 482 Fixed assets 31 Other current and non-current assets 6 Accounts payable (71 ) Accrued expenses (61 ) Estimated fair value of net tangible assets acquired 1,786 Estimated fair value of identifiable intangible assets 7,100 Estimated goodwill 4,232 Estimated fair value of net assets acquired 13,118 Less cash acquired (1,118 ) Net purchase price $ 12,000 The amounts above represent the preliminary fair value estimates as of June 30, 2019 and are subject to subsequent adjustment as the Company obtains additional information during the measurement period and finalizes its fair value estimates. The preliminary identifiable intangible asset estimates include customer relationships of $4,200 with a useful life of 10 years, completed technology of $2,500 with a useful life of 9 years and backlog of $400 with a useful life of one year . Any subsequent adjustments to these fair value estimates occurring during the measurement period will result in an adjustment to goodwill. The goodwill of $4,232 largely reflects the potential synergies and expansion of the Company's offerings across product lines and markets complementary to the Company's existing products and markets. The goodwill from this acquisition is reported under the Advanced Microelectronic Solutions (“AMS”) reporting unit. Since Syntonic was a limited liability company, the acquisition is treated as an asset purchase for tax purposes. The Company has estimated the tax value of the intangible assets from this transaction and is amortizing the amount over 15 years for tax purposes. As of June 30, 2019, the Company had $3,092 of goodwill deductible for tax purposes. The Company has not furnished pro forma information relating to Syntonic because such information is not material to the Company's financial results. The revenues and income before income taxes from Syntonic included in the Company's consolidated results for the fiscal year ended June 30, 2019 were $993 and $133 , respectively. The Syntonic results include expenses resulting from purchase accounting which include amortization of intangible assets. G ECO A VIONICS A QUISITION On January 29, 2019, the Company acquired GECO Avionics, LLC (“GECO”). Based in Mesa, Arizona, GECO has over twenty years of experience designing and manufacturing affordable safety-critical avionics and mission computing solutions. The Company acquired GECO for an all cash purchase price of $36,500 , prior to net working capital and net debt adjustments, which was funded through the Revolver. The following table presents the net purchase price and the fair values of the assets and liabilities of GECO on a preliminary basis: Amounts Consideration transferred Cash paid at closing $ 36,500 Net purchase price $ 36,500 Estimated fair value of tangible assets acquired and liabilities assumed Accounts receivable $ 1,320 Inventory 1,454 Fixed assets 459 Accounts payable (217 ) Accrued expenses (239 ) Estimated fair value of net tangible assets acquired 2,777 Estimated fair value of identifiable intangible assets 12,500 Estimated goodwill 21,223 Estimated fair value of net assets acquired 36,500 Net purchase price $ 36,500 The amounts above represent the preliminary fair value estimates as of June 30, 2019 and are subject to subsequent adjustment as the Company obtains additional information during the measurement period and finalizes its fair value estimates. The preliminary identifiable intangible asset estimates include customer relationships of $6,700 with a useful life of 11 years, completed technology of $4,800 with a useful life of 10 years and backlog of $1,000 with a useful life of two years . Any subsequent adjustments to these fair value estimates occurring during the measurement period will result in an adjustment to goodwill. The goodwill of $21,223 largely reflects the potential synergies and expansion of the Company's offerings across product lines and markets complementary to the Company's existing products and markets. The goodwill from this acquisition is reported under the Sensor and Mission Processing (“SMP”) reporting unit. Since GECO was a limited liability company, the acquisition is treated as an asset purchase for tax purposes. The Company has estimated the tax value of the intangible assets from this transaction and is amortizing the amount over 15 years for tax purposes. As of June 30, 2019, the Company had $20,984 of goodwill deductible for tax purposes. The Company has not furnished pro forma information relating to GECO because such information is not material to the Company's financial results. The revenues and loss before income taxes from GECO included in the Company's consolidated results for the fiscal year ended June 30, 2019 were $6,834 and $112 , respectively. The GECO results include expenses resulting from purchase accounting which include amortization of intangible assets and inventory step-up. G ERMANE S YSTEMS A CQUISITION On July 31, 2018, the Company acquired Germane Systems, LC (“Germane”). Based in Chantilly, Virginia, Germane is an industry leader in the design, development and manufacturing of rugged servers, computers and storage systems for command, control and intelligence (“C2I”) applications. The Company acquired Germane for an all cash purchase price of $45,000 , prior to net working capital and net debt adjustments. The Company funded the acquisition with borrowings obtained under the Revolver. On December 12, 2018 the Company and former owners of Germane agreed to post-closing adjustments totaling $1,244 , which decreased the Company's net purchase price. The following table presents the net purchase price and the fair values of the assets and liabilities of Germane on a preliminary basis: Amounts Consideration transferred Cash paid at closing $ 47,166 Working capital and net debt adjustment (1,244 ) Less cash acquired (193 ) Net purchase price $ 45,729 Estimated fair value of tangible assets acquired and liabilities assumed Cash $ 193 Accounts receivable 4,277 Inventory 8,575 Fixed assets 867 Other current and non-current assets 596 Accounts payable (3,146 ) Accrued expenses (1,229 ) Other current and non-current liabilities (232 ) Estimated fair value of net tangible assets acquired 9,901 Estimated fair value of identifiable intangible assets 12,910 Estimated goodwill 23,111 Estimated fair value of net assets acquired 45,922 Less cash acquired (193 ) Net purchase price $ 45,729 The amounts above represent the preliminary fair value estimates as of June 30, 2019 and are subject to subsequent adjustment as the Company obtains additional information during the measurement period and finalizes its fair value estimates. The preliminary identifiable intangible asset estimates include customer relationships of $8,500 with a useful life of 11 years, completed technology of $4,200 with a useful life of eight years and backlog of $210 with a useful life of one year . Any subsequent adjustments to these fair value estimates occurring during the measurement period will result in an adjustment to goodwill. On July 31, 2019, the measurement period for Germane expired. The goodwill of $23,111 largely reflects the potential synergies and expansion of the Company's offerings across product lines and markets complementary to the Company's existing products and markets. The goodwill from this acquisition is reported under the MDS reporting unit. Since Germane was a limited liability company, the acquisition is treated as an asset purchase for tax purposes. The Company has estimated the tax value of the intangible assets from this transaction and is amortizing the amount over 15 years for tax purposes. As of June 30, 2019, the Company had $22,102 of goodwill deductible for tax purposes. The Company has not furnished pro forma information relating to Germane because such information is not material to the Company's financial results. The revenues and income before income taxes from Germane included in the Company's consolidated results for the fiscal year ended June 30, 2019 were $46,767 and $3,132 , respectively. The Germane results include expenses resulting from purchase accounting which include amortization of intangible assets and inventory step-up. T HEMIS C OMPUTER A CQUISITION On December 21, 2017, the Company and Thunderbird Merger Sub, Inc., a newly formed, wholly-owned subsidiary of the Company (the “Merger Sub”), entered into a Merger Agreement (the “Merger Agreement”) with Ceres Systems (“Ceres”), the holding company that owned Themis Computer (“Themis”, and together with Ceres, collectively the “Acquired Company”). On February 1, 2018, the Company closed the transaction and the Merger Sub merged with and into Ceres with Ceres continuing as the surviving company and a wholly-owned subsidiary of Mercury (the “Merger”). By operation of the Merger, the Company acquired both Ceres and its wholly-owned subsidiary, Themis. Based in Fremont, California, Themis is a leading designer, manufacturer and integrator of commercial, SWaP-optimized rugged servers, computers and storage systems for U.S. and international markets. Under the terms of the Merger Agreement, the merger consideration (including payments with respect to outstanding stock options) consisted of an all cash purchase price of approximately $180,000 , prior to net working capital and net debt adjustments. The merger consideration is subject to post-closing adjustments based on a determination of closing net working capital, transaction expenses and net debt (all as defined in the Merger Agreement). The Company funded the acquisition with borrowings obtained under the Revolver. On July 13, 2018, the Company and former owners of Ceres agreed to post-closing adjustments totaling $700 , which decreased the Company's net purchase price. The following table presents the net purchase price and the fair values of the assets and liabilities of Themis: Amounts Consideration transferred Cash paid at closing $ 187,089 Working capital and net debt adjustment (1,274 ) Less cash acquired (6,810 ) Net purchase price $ 179,005 Fair value of tangible assets acquired and liabilities assumed Cash $ 6,810 Accounts receivable 7,713 Inventory 7,333 Fixed assets 479 Other current and non-current assets 2,896 Accounts payable (3,287 ) Accrued expenses (5,319 ) Other current and non-current liabilities (1,210 ) Deferred tax liability (14,307 ) Fair value of net tangible assets acquired 1,108 Fair value of identifiable intangible assets 71,720 Goodwill 112,987 Fair value of net assets acquired 185,815 Less cash acquired (6,810 ) Net purchase price $ 179,005 On February 1, 2019, the measurement period for Themis expired. The identifiable intangible asset estimates include customer relationships of $52,600 with a useful life of 12.5 years , completed technology of $17,150 with a useful life of 9.5 years and backlog of $1,970 with a useful life of one year . The goodwill of $112,987

Fair Value of Financial Instrum

Fair Value of Financial Instruments	12 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments The following table summarizes the Company’s financial assets measured at fair value on a recurring basis at June 30, 2019 : Fair Value Measurements June 30, 2019 Level 1 Level 2 Level 3 Assets: Certificates of deposit $ 31,522 $ — $ 31,522 $ — Total $ 31,522 $ — $ 31,522 $ — The following table summarizes the Company’s financial assets measured at fair value on a recurring basis at June 30, 2018: Fair Value Measurements June 30, 2018 Level 1 Level 2 Level 3 Assets: Certificates of deposit $ 1,056 $ — $ 1,056 $ — Total $ 1,056 $ — $ 1,056 $ — The carrying values of cash and cash equivalents, including money market funds, restricted cash, accounts receivable and payable, and accrued liabilities approximate fair value due to the short-term maturities of these assets and liabilities. The fair value of the Company’s certificates of deposit are determined through quoted prices for identical or similar instruments in markets that are not active or are directly or indirectly observable. The Company terminated its interest rate swap during the fourth quarter of fiscal 2019 in conjunction with the net proceeds generated by the follow-on equity offering. As such, the Company had no interest rate swaps as of June 30, 2019.

Inventory

Inventory	12 Months Ended
	Jun. 30, 2019
Inventory Disclosure [Abstract]
Inventory	Inventory Inventory was comprised of the following: June 30, 2019 2018 Raw materials $ 84,561 $ 61,748 Work in process 38,525 30,841 Finished goods 14,026 15,996 Total $ 137,112 $ 108,585 The $28,527

Property and Equipment

Property and Equipment	12 Months Ended
	Jun. 30, 2019
Property, Plant and Equipment [Abstract]
Property and Equipment	Property and Equipment Property and equipment consisted of the following: Estimated Useful Lives (Years) June 30, 2019 2018 Computer equipment and software 3-4 $ 78,195 $ 71,799 Furniture and fixtures 5 5,330 4,927 Leasehold improvements lesser of estimated useful life or lease term 25,646 21,552 Machinery and equipment 5-10 63,792 47,419 172,963 145,697 Less: accumulated depreciation (112,962 ) (94,717 ) $ 60,001 $ 50,980 The $9,021 increase in property and equipment was primarily due to current year additions and property and equipment associated with the acquisitions of Germane, GECO, Athena and Syntonic. These increases were partially offset by ongoing depreciation expense. During fiscal 2019 and 2018 , the Company retired $3,980 and $611 , respectively, of computer equipment and software, furniture, and fixtures, leasehold improvements, and machinery and equipment that were no longer in use by the Company. Depreciation expense related to property and equipment for the fiscal years ended June 30, 2019 , 2018 and 2017 was $18,478 , $16,273 and $12,589 , respectively.

Goodwill

Goodwill	12 Months Ended
	Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	Goodwill The following table sets forth the changes in the carrying amount of goodwill by reporting unit for the year ended June 30, 2019: SMP AMS MDS Total Balance at June 30, 2018 $ 119,560 $ 218,147 $ 159,735 $ 497,442 Goodwill adjustment for the Themis acquisition 139 139 Goodwill arising from the Germane acquisition 23,111 23,111 Goodwill arising from the GECO acquisition 21,223 21,223 Goodwill arising from the Syntonic acquisition 4,232 4,232 Goodwill arising from the Athena acquisition 15,999 15,999 Balance at June 30, 2019 $ 140,783 $ 222,379 $ 198,984 $ 562,146

Intangible Assets

Intangible Assets	12 Months Ended
	Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	Intangible Assets Intangible assets consisted of the following: Gross Carrying Amount Accumulated Amortization Net Carrying Amount Weighted Average Useful Life June 30, 2019 Customer relationships $ 167,460 $ (38,308 ) $ 129,152 11.4 years Licensing agreements and patents 1,505 (1,022 ) 483 3.5 years Completed technologies 97,592 (22,246 ) 75,346 9.0 years Backlog 1,610 (467 ) 1,143 1.6 years $ 268,167 $ (62,043 ) $ 206,124 June 30, 2018 Customer relationships $ 171,940 $ (46,505 ) $ 125,435 10.7 years Licensing agreements and patents 1,506 (640 ) 866 3.5 years Completed technologies 62,392 (13,101 ) 49,291 8.1 years Backlog 7,650 (5,338 ) 2,312 1.6 years $ 243,488 $ (65,584 ) $ 177,904 Estimated future amortization expense for intangible assets remaining at June 30, 2019 is as follows: Fiscal Year Totals 2020 $ 27,606 2021 26,390 2022 26,002 2023 24,020 2024 20,869 Thereafter 81,237 Total future amortization expense $ 206,124 The following table summarizes the preliminary estimated fair value of acquired intangible assets arising as a result of the Athena acquisition. These assets are included in the Company's gross and net carrying amounts as of June 30, 2019. Gross Accumulated Net Weighted Completed technologies $ 23,700 $ (358 ) $ 23,342 11.0 years $ 23,700 $ (358 ) $ 23,342 The following table summarizes the preliminary estimated fair value of acquired intangible assets arising as a result of the Syntonic acquisition. These assets are included in the Company's gross and net carrying amounts as of June 30, 2019. Gross Carrying Amount Accumulated Amortization Net Carrying Amount Weighted Average Useful Life Customer relationships $ 4,200 $ (70 ) $ 4,130 10.0 years Completed technologies 2,500 (46 ) 2,454 9.0 years Backlog 400 (67 ) 333 1.0 year $ 7,100 $ (183 ) $ 6,917 The following table summarizes the preliminary estimated fair value of acquired intangible assets arising as a result of the GECO acquisition. These assets are included in the Company's gross and net carrying amounts as of June 30, 2019. Gross Accumulated Net Weighted Customer relationships $ 6,700 $ (254 ) $ 6,446 11.0 years Completed technologies 4,800 (200 ) 4,600 10.0 years Backlog 1,000 (208 ) 792 2.0 years $ 12,500 $ (662 ) $ 11,838 The following table summarizes the preliminary estimated fair value of acquired intangible assets arising as a result of the Germane acquisition. These assets are included in the Company's gross and net carrying amounts as of June 30, 2019. Gross Accumulated Net Weighted Customer relationships $ 8,500 $ (708 ) $ 7,792 11.0 years Completed technologies 4,200 (482 ) 3,718 8.0 years Backlog 210 (193 ) 17 1.0 year $ 12,910 $ (1,383 ) $ 11,527

Restructuring Plan

Restructuring Plan	12 Months Ended
	Jun. 30, 2019
Restructuring and Related Activities [Abstract]
Restructuring Plan	Restructuring During fiscal 2019 , the Company incurred $560 of net restructuring and other charges primarily related to severance costs associated with the recently acquired Germane business. Restructuring and other charges are typically related to acquisitions and organizational redesign programs initiated as part of discrete post-acquisition integration activities. During fiscal 2018 , the Company incurred $3,159 of restructuring and other charges primarily related to the elimination of 38 positions predominantly in R&D and operations functions as well as executive severance. During the fourth quarter of fiscal 2017 , the Company initiated a plan to close its Manteca, California facility as a result of the acquisition of Delta. The Company incurred $910 of severance and related expenses in conjunction with the elimination of 33 positions primarily in operations functions related to the planned closure of the facility. Additionally, the Company incurred $1,042 in restructuring expenses related to other various restructuring events during fiscal 2017 . All of the restructuring and other charges are classified as operating expenses in the consolidated statements of operations and any remaining severance obligations are expected to be paid within the next twelve months. The remaining restructuring liability is classified as accrued expenses in the consolidated balance sheets. The following table presents the detail of expenses for the Company’s restructuring plans: Severance & Related Facilities & Other Total Restructuring liability at June 30, 2017 $ 1,365 $ — $ 1,365 Restructuring charges 3,181 230 3,411 Cash paid (2,546 ) (177 ) (2,723 ) Reversals (*) (199 ) (53 ) (252 ) Restructuring liability at June 30, 2018 1,801 — 1,801 Restructuring charges 549 80 629 Cash paid (2,333 ) (24 ) (2,357 ) Reversals (*) (13 ) (56 ) (69 ) Restructuring liability at June 30, 2019 $ 4 $ — $ 4 (*) Reversals result from the unused outplacement services and operating costs.

Income Taxes

Income Taxes	12 Months Ended
	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The components of income before income taxes and income tax expense were as follows: Year Ended June 30, 2019 2018 2017 Income before income taxes: United States $ 57,281 $ 43,368 $ 30,499 Foreign 2,246 (795 ) 569 $ 59,527 $ 42,573 $ 31,068 Tax provision (benefit): Federal: Current $ 11,454 $ 4,470 $ 11,476 Deferred (3,008 ) (4,527 ) (7,645 ) 8,446 (57 ) 3,831 State: Current 5,194 2,370 3,650 Deferred (1,421 ) (537 ) (1,684 ) 3,773 1,833 1,966 Foreign: Current 546 186 240 Deferred (13 ) (272 ) 156 533 (86 ) 396 $ 12,752 $ 1,690 $ 6,193 The following is the reconciliation between the statutory federal income tax rate and the Company’s effective income tax rate: Year Ended June 30, 2019 2018 2017 Tax provision at federal statutory rates 21.0 % 28.0 % 35.0 % State income tax, net of federal tax benefit 5.9 5.6 4.9 Research and development credits (4.5 ) (5.1 ) (6.1 ) Excess tax benefits on stock compensation (4.5 ) (18.5 ) (13.1 ) Domestic manufacturing deduction — (2.0 ) (3.9 ) Deemed repatriation of foreign earnings — 1.9 (0.1 ) Foreign income tax rate differential 0.1 0.3 0.2 Officer and equity compensation 2.0 1.7 1.8 Acquisition costs 0.1 1.4 0.9 Reserves for tax contingencies 0.3 0.3 (0.6 ) Benefit from tax rate changes — (2.3 ) — Impacts related to acquired tax attributes — (8.7 ) — Other 1.0 1.4 0.9 21.4 % 4.0 % 19.9 % On December 22, 2017, the Tax Cuts and Jobs Act of 2017 (the “Tax Act”) was enacted by the U.S. government. The Tax Act impacted the U.S. corporate tax rate that the Company will use going forward, which has been reduced to 21% from 35%. As the Company has a June 30 fiscal year-end, the lower U.S. corporate tax rate was phased in, resulting in a U.S. corporate tax rate of approximately 28% for the Company's fiscal year ended June 30, 2018, and 21% for fiscal year ended June 30, 2019 and subsequent fiscal years. The Tax Act also includes items that increase the Company’s tax expense including, but not limited to, the elimination of the domestic manufacturing deduction and increased limitations on deductions for executive compensation. In addition, the actual effective tax rate may be materially different than the statutory Federal tax rate (including being higher) based on the availability and impact of various other adjustments including, but not limited to, state taxes, Federal research and development credits, discrete tax benefits related to stock compensation, and the inclusion or exclusion of various items in taxable income which may differ from GAAP income. The effective tax rate for fiscal 2019 differed from the federal statutory rate primarily due to benefits related to research and development tax credits and excess tax benefits for equity compensation. These benefits are offset by additional tax expense for state and local income taxes, non-deductible officer compensation and non-deductible equity compensation. During fiscal 2019 and 2018, the Company recognized a discrete tax benefit of $2,672 and $7,897 , respectively, related to excess tax benefits on stock-based compensation. The components of the Company’s net deferred tax liabilities were as follows: June 30, 2019 2018 Deferred tax assets: Inventory valuation and receivable allowances $ 10,313 $ 8,476 Accrued compensation 4,644 3,803 Equity compensation 4,595 3,944 Federal and state research and development tax credit carryforwards 15,510 18,784 Other accruals 1,128 1,085 Deferred compensation 1,561 1,561 Acquired net operating loss carryforward 721 1,634 Capital loss carryforwards 2,354 2,413 Other temporary differences 2,258 1,565 43,084 43,265 Valuation allowance (16,666 ) (16,992 ) Total deferred tax assets 26,418 26,273 Deferred tax liabilities: Prepaid expenses (848 ) (696 ) Property and equipment (4,927 ) (4,436 ) Intangible assets (38,399 ) (34,546 ) Other temporary differences (58 ) (230 ) Total deferred tax liabilities (44,232 ) (39,908 ) Net deferred tax liabilities $ (17,814 ) $ (13,635 ) As reported: Deferred tax liabilities $ (17,814 ) $ (13,635 ) $ (17,814 ) $ (13,635 ) At June 30, 2019, the Company evaluated the need for a valuation allowance on deferred tax assets. In assessing whether the deferred tax assets are realizable, management considered whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the Company's past operating results, its forecast of future earnings, future taxable income, and tax planning strategies. The Company continues to conclude that it is more likely than not that most domestic deferred tax assets would be realizable based on recent financial performance, projected future taxable income and the reversal of existing deferred tax liabilities. The Company continues to record a full valuation allowance on capital loss carryforwards and certain state research and development credits as of June 30, 2019 as management continues to believe that it is not more likely than not that these deferred tax assets would be realized. Any future reversals of the valuation allowance will impact income tax expense. The Company had federal research and development credit carryforwards of $345 , which will begin to expire in 2029 . The Company had state research and development credit carryforwards of $15,165 , which will expire from 2019 through 2033. The Company files income tax returns in all jurisdictions in which it operates. The Company has established reserves to provide for additional income taxes that management believes will more likely than not be due in future years as these previously filed tax returns are audited. These reserves have been established based upon management’s assessment as to the potential exposures. All tax reserves are analyzed quarterly and adjustments are made as events occur and warrant modification. On August 21, 2018, the Internal Revenue Service (“IRS”) provided initial guidance on amendments made to the limitation on executive compensation by the Tax Act. During the three months ended September 30, 2018, the Company recorded an unrecognized tax position as a result of this guidance. Upon further technical and legal analysis, the Company determined that it’s position no longer required a reserve. No other material changes to the Company’s unrecognized tax positions occurred during fiscal 2019. The changes in the Company’s reserves for unrecognized income tax benefits are summarized as follows: Year Ended June 30, 2019 2018 Unrecognized tax benefits, beginning of period $ 998 $ 804 Increases for previously recognized positions — — Settlements of previously recognized positions — — Reductions as a result of a lapse of the applicable statute of limitations — (81 ) Increases for currently recognized positions 275 315 Reductions for previously recognized positions — (40 ) Unrecognized tax benefits, end of period $ 1,273 $ 998 The $1,273 of unrecognized tax benefits as of June 30, 2019 , if released, would reduce income tax expense. The Company includes interest and penalties related to unrecognized tax benefits within the provision for income taxes. The total amount of gross interest and penalties accrued was $84 as of June 30, 2019 and 2018. In connection with tax matters, the Company recognized interest and penalty expense in fiscal 2019, 2018 and 2017 of $101 , $42 and $30 , respectively.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies L EGAL C LAIMS The Company is subject to litigation, claims, investigations and audits arising from time to time in the ordinary course of business. Although legal proceedings are inherently unpredictable, the Company believes that it has valid defenses with respect to any matters currently pending against the Company and intends to defend itself vigorously. The outcome of these matters, individually and in the aggregate, is not expected to have a material impact on the Company's cash flows, results of operations, or financial position. I NDEMNIFICATION O BLIGATIONS The Company's standard product sales and license agreements entered into in the ordinary course of business typically contain an indemnification provision pursuant to which the Company indemnifies, holds harmless, and agrees to reimburse the indemnified party for losses suffered or incurred by the indemnified party in connection with any patent, copyright or other intellectual property infringement claim by any third party with respect to the Company's products. Such provisions generally survive termination or expiration of the agreements. The potential amount of future payments the Company could be required to make under these indemnification provisions is, in some instances, unlimited. P URCHASE C OMMITMENTS As of June 30, 2019 , the Company has entered into non-cancelable purchase commitments for certain inventory components and services used in its normal operations. The purchase commitments covered by these agreements are for less than one year and aggregate to $73,762 . L EASE C OMMITMENTS The Company leases certain facilities, machinery and equipment under various cancelable and non-cancelable operating leases that expire at various dates through fiscal 2032. The leases contain various renewal options. Rental charges are subject to escalation for increases in certain operating costs of the lessor. For tenant improvement allowances and rent holidays, the Company records a deferred rent liability on the consolidated balance sheets and amortizes the deferred rent over the terms of the leases as reductions to rent expense on the consolidated statements of operations. Rental expense during the fiscal years ended June 30, 2019 , 2018 and 2017 was $8,710 , $6,534 and $7,774 , respectively. Minimum lease payments under the Company’s non-cancelable operating leases are as follows: Fiscal Year Totals 2020 $ 10,205 2021 8,949 2022 8,280 2023 7,414 2024 6,496 Thereafter 28,286 Total minimum lease payments $ 69,630 O THER As part of the Company's strategy for growth, the Company continues to explore acquisitions or strategic alliances. The associated acquisition costs incurred in the form of professional fees and services may be material to the future periods in which they occur, regardless of whether the acquisition is ultimately completed. The Company may elect from time to time to purchase and subsequently retire shares of common stock in order to settle an individual employees’ tax liability associated with vesting of a restricted stock award or exercise of stock options. These transactions would be treated as a use of cash in financing activities in the Company's statement of cash flows.

Debt

Debt	12 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Debt	Debt Revolving Credit Facilities On May 2, 2016, the Company and certain of its subsidiaries, as guarantors, entered into a Credit Agreement (the “Credit Agreement”) with a syndicate of commercial banks and Bank of America, N.A acting as the administrative agent. The Credit Agreement provided for a $200,000 term loan facility (“the Term Loan”) and a $100,000 revolving credit facility. On June 27, 2017, the Company amended the Credit Agreement to increase and extend the borrowing capacity of the Revolver to $400,000 expiring in June 2022 (“the Amended Credit Agreement”). In connection with the amendment, the Company also repaid the remaining principal and accrued and unpaid interest outstanding on the Term Loan using cash on hand at which point the Term Loan portion of the Credit Agreement was cancelled. On September 28, 2018, the Company amended the Revolver to increase and extend the borrowing capacity to a $750,000 , 5 -year revolving credit line, with the maturity extended to September 28, 2023. The Company evaluated the amended Credit Agreement under ASC 470, Debt , and determined that the amendment represented a modification of the Credit Agreement. Due to the increase in the borrowing capacity of the Revolver, new costs associated with the amendment and the previous balance of unamortized deferred financing costs totaling $5,713 , are being amortized to other income (expense), net on a straight line basis over the new term of the Revolver. As of June 30, 2019 , there were no outstanding borrowings against the Revolver. The Company incurred interest expense from the Revolver of $9,109 and $2,850 for the years ended June 30, 2019 and 2018, respectively. There were also outstanding letters of credit of $1,737 as of June 30, 2019 . Maturity The Revolver has a five years maturity, which was extended to September 28, 2023. Interest Rates and Fees Borrowings under the Revolver bear interest, at the Company’s option, at floating rates tied to LIBOR or the prime rate plus an applicable percentage. The applicable percentage is set at LIBOR plus 1.5% and is established pursuant to a pricing grid based on the Company's total net leverage ratio. In addition to interest on the aggregate outstanding principal amounts of any borrowings, the Company will also pay a quarterly commitment fee on the unutilized commitments under the Revolver. The applicable percentage is pursuant to a pricing grid based on the Company's total net leverage ratio. As of June 30, 2019, the stated interest rate for unutilized commitments was 0.25% per annum. The Company will also pay customary letter of credit and agency fees. Covenants and Events of Default The Revolver provides for customary negative covenants. The Revolver also requires the Company to comply with certain financial covenants, including a quarterly minimum consolidated cash interest charge ratio test and a quarterly maximum consolidated total net leverage ratio test. The Revolver also provides for customary representations and warranties, affirmative covenants and events of default. If an event of default occurs, the lenders under the Revolver will be entitled to take various actions, including the termination of unutilized commitments, the acceleration of amounts outstanding under the Revolver and all actions permitted to be taken by a secured creditor. As of June 30, 2019 , the Company was in compliance with all covenants and conditions under the Revolver. Guarantees and Security The Company's obligations under the Revolver are guaranteed by certain of its material domestic wholly-owned restricted subsidiaries (the “Guarantors”). The obligations of both the Company and the Guarantors are secured by a perfected security interest in substantially all of the assets of the Company and the Guarantors, in each case, now owned or later acquired, including a pledge of all of the capital stock of substantially all of its domestic wholly-owned restricted subsidiaries and 65%

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Jun. 30, 2019
Retirement Benefits [Abstract]
Employee Benefit Plans	Employee Benefit Plans Pension Plan The Company maintains a pension plan (the “Plan”) for its Swiss employees, which is administered by an independent pension fund. The Plan is mandated by Swiss law and meets the criteria for a defined benefit plan under ASC 715, Compensation—Retirement Benefits (“ASC 715”), since participants of the Plan are entitled to a defined rate of return on contributions made. The independent pension fund is a multi-employer plan with unrestricted joint liability for all participating companies for which the Plan’s overfunding or underfunding is allocated to each participating company based on an allocation key determined by the Plan. The Company recognizes a net asset or liability for the Plan equal to the difference between the projected benefit obligation of the Plan and the fair value of the Plan’s assets as required by ASC 715. The funded status may vary from year to year due to changes in the fair value of the Plan’s assets and variations on the underlying assumptions of the projected benefit obligation of the Plan. On January 1, 2019, the independent pension fund changed the conversion rate for accumulated retirement savings. The Company’s results contain the effects of this change in conversion rates by the independent pension fund as prior service costs. These prior service costs are amortized from AOCI to net periodic benefit costs over approximately 10 years. At June 30, 2019 , the accumulated benefit obligation of the Plan equals the fair value of the Plan's assets. The Plan's funded status at June 30, 2019 and 2018 was a net liability of $9,186 and $6,098 , respectively, which is recorded in other non-current liabilities on the consolidated balance sheets. The Company recorded a net loss of $2,350 and a net gain of $354 in AOCI during the year ended June 30, 2019 and 2018 , respectively. Total employer contributions to the Plan were $741 during the year ended June 30, 2019 , and the Company's total expected employer contributions to the Plan during fiscal 2020 are $822 . The following table reflects the total pension benefits expected to be paid from the Plan, which is funded from contributions by participants and the Company. Fiscal Year Total 2020 $ 761 2021 733 2022 883 2023 1,197 2024 1,040 Thereafter (next 5 years) 5,529 Total $ 10,143 The following table outlines the components of net periodic benefit cost of the Plan for the year ended June 30, 2019 and 2018 : Year Ended June 30, 2019 2018 Service cost $ 903 $ 835 Interest cost 156 121 Expected return on assets (183 ) (162 ) Amortization of prior service cost (61 ) 39 Net periodic benefit cost $ 815 $ 833 The following table reflects the related actuarial assumptions used to determine net periodic benefit cost of the Plan for the year ended June 30, 2019 and 2018 : Year Ended June 30, 2019 2018 Discount rate 0.50 % 0.85 % Expected rate of return on Plan assets 1.50 % 1.50 % Expected inflation 1.20 % 1.20 % Rate of compensation increases 1.50 % 1.20 % The calculation of the projected benefit obligation (“PBO”) utilized BVG 2015 Generational data for assumptions related to the mortality rates, disability rates, turnover rates, and early retirement ages. The PBO represents the present value of Plan benefits earned through the end of the year, with an allowance for future salary and pension increases as well as turnover rates. The following table presents the change in projected benefit obligation for the periods presented: Year Ended June 30, 2019 2018 Projected benefit obligation, beginning $ 18,127 $ 17,526 Service cost 903 835 Interest cost 156 121 Employee contributions 3,577 1,931 Actuarial gain 2,859 466 Benefits paid (1,607 ) (1,215 ) Plan amendment — (941 ) Foreign exchange loss (gain) 259 (596 ) Projected benefit obligation at end of year $ 24,274 $ 18,127 The following table presents the change in Plan assets for the periods presented: Year Ended June 30, 2019 2018 Fair value of Plan assets, beginning $ 12,029 $ 10,925 Actual return on Plan assets 167 167 Company contributions 741 608 Employee contributions 3,577 1,931 Benefits paid (1,607 ) (1,215 ) Foreign exchange gain (loss) 181 (387 ) Fair value of Plan assets at end of year $ 15,088 $ 12,029 The following table presents the Company's reconciliation of funded status for the period presented: Projected benefit obligation at end of year $ 24,274 $ 18,127 Fair value of plan assets at end of year 15,088 12,029 Funded status $ (9,186 ) $ (6,098 ) The fair value of Plan assets were $15,088 at June 30, 2019 . The Plan is denominated in a foreign currency, the Swiss Franc, which can have an impact on the fair value of Plan assets. The Plan was not subject to material fluctuations during years ended June 30, 2019 or 2018 . The Plan’s assets are administered by an independent pension fund foundation (the “foundation”). As of June 30, 2019, the foundation has invested the assets of the Plan in various investments vehicles, including cash, real estate, equity securities, and bonds. The investments are measured at fair value using a mix of Level 1, Level 2 and Level 3 inputs. 401(k) Plan The Company maintains a qualified 401(k) plan (the “401(k) Plan”) for its U.S. employees. During fiscal 2019 , 2018 and 2017 , the Company matched employee contributions up to 3% of eligible compensation. The Company may also make optional contributions to the plan for any plan year at its discretion. Expense recognized by the Company for matching contributions related to the 401(k) plan was $4,525 , $3,684 and $3,206 during the fiscal years ended June 30, 2019 , 2018 , and 2017 , respectively.

Shareholders' Equity

Shareholders' Equity	12 Months Ended
	Jun. 30, 2019
Equity [Abstract]
Shareholders' Equity	Shareholders’ Equity P REFERRED S TOCK The Company is authorized to issue 1,000 shares of preferred stock with a par value of $0.01 per share. S HELF R EGISTRATION S TATEMENT On August 28, 2017, the Company filed a shelf registration statement on Form S-3ASR with the SEC. The shelf registration statement, which was effective upon filing with the SEC, registered each of the following securities: debt securities, preferred stock, common stock, warrants and units. The Company has an unlimited amount available under the shelf registration statement. Additionally, as part of the shelf registration statement, the Company has entered into an equity distribution agreement which allows the Company to sell an aggregate of up to $200,000 of its common stock from time to time through its agents. F OLLOW-ON E QUITY O FFERING On May 20, 2019 the Company announced the commencement of an underwritten public offering of 5,000 shares of its common stock, par value $0.01 , with an over-allotment allocation of an additional 750 shares. On May 23, 2019, the Company announced it upsized the initial 5,000 share public offering to 6,000 shares, with an over-allotment allocation of 900 shares. On May 31, 2019 the Company closed the offering, including the full over-allotment allocation, selling an aggregate of 6,900 shares of common stock at a price to the public of $69.00 for total net proceeds of $454,343

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Jun. 30, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation S TOCK I NCENTIVE P LANS The Board of Directors approved the Company’s 2018 Stock Incentive Plan (the “2018 Plan”) on July 23, 2018. The 2018 Plan became effective upon the approval of shareholders at the Company’s annual meeting held on October 24, 2018. The aggregate number of shares authorized for issuance under the 2018 Plan is 2,862 shares, with an additional 710 shares rolled into the 2018 Plan that were available for future grant under the Company’s 2005 Stock Incentive Plan, as amended and restated (the “2005 Plan”) at the time of shareholder approval of the 2018 Plan. The 2018 Plan replaced the 2005 Plan. The shares authorized for issuance under the 2018 Plan will be increased by any future cancellations, forfeitures or terminations (other than by exercise) of awards under the 2005 Plan. The foregoing does not affect any outstanding awards under the 2005 Plan, which remain in full force and effect in accordance with their terms. The 2018 Plan provides for the grant of non-qualified and incentive stock options, restricted stock, stock appreciation rights and deferred stock awards to employees and non-employees. All stock options are granted with an exercise price of not less than 100% of the fair value of the Company’s common stock at the date of grant and the options generally have a term of seven years . There were 3,512 shares available for future grant under the 2018 Plan at June 30, 2019. As part of the Company's ongoing annual equity grant program for employees, the Company grants performance-based restricted stock awards to certain executives and employees pursuant to the 2018 Plan. Performance awards vest based on the requisite service period subject to the achievement of specific financial performance targets. Based on the performance targets, some of these awards require graded vesting which results in more rapid expense recognition compared to traditional time-based vesting over the same vesting period. The Company monitors the probability of achieving the performance targets on a quarterly basis and may adjust periodic stock compensation expense accordingly based on its determination of the likelihood for reaching targets. The performance targets include: (i) the achievement of internal performance targets only, and (ii) the achievement of internal performance targets in relation to a peer group of companies. E MPLOYEE S TOCK P URCHASE P LAN The number of shares authorized for issuance under the Company’s 1997 Employee Stock Purchase Plan, as amended and restated (“ESPP”), is 1,800 shares. Under the ESPP, rights are granted to purchase shares of common stock at 85% of the lesser of the market value of such shares at either the beginning or the end of each six-month offering period. The ESPP permits employees to purchase common stock through payroll deductions, which may not exceed 10% of an employee’s compensation as defined in the ESPP. The number of shares issued under the ESPP during fiscal years 2019 , 2018 , and 2017 was 102 , 82 and 96 , respectively. Shares available for future purchase under the ESPP totaled 118 at June 30, 2019 . S TOCK O PTION AND A WARD A CTIVITY The following table summarizes activity of the Company’s stock option plans since June 30, 2017 : Options Outstanding Number of Weighted Average Weighted Average Aggregate Outstanding at June 30, 2017 51 $ 13.53 0.60 Granted — — Exercised (47 ) 14.12 Cancelled — — Outstanding at June 30, 2018 4 $ 5.52 3.13 Granted — — Exercised — — Cancelled — — Outstanding at June 30, 2019 4 $ 5.52 2.13 $ 227 Vested and expected to vest at June 30, 2019 4 $ 5.52 2.13 $ 227 Exercisable at June 30, 2019 4 $ 5.52 2.13 $ 227 There were no options exercised during fiscal 2019 . The intrinsic value of the options exercised during fiscal years 2018 , and 2017 was $1,780 and $3,762 , respectively. Non-vested stock options are subject to the risk of forfeiture until the fulfillment of specified conditions. As of June 30, 2019 , 2018 and 2017 , there was no unrecognized compensation cost related to non-vested options granted under the Company’s stock plans. There were no stock options granted during fiscal years 2019 , 2018 or 2017 . The following table summarizes the status of the Company’s non-vested restricted stock awards since June 30, 2017 : Non-Vested Restricted Stock Awards Number of Shares Weighted Average Grant Date Fair Value Outstanding at June 30, 2017 1,564 $ 18.93 Granted 521 47.28 Vested (821 ) 46.71 Forfeited (129 ) 31.41 Outstanding at June 30, 2018 1,135 $ 27.26 Granted 468 52.50 Vested (478 ) 51.50 Forfeited (79 ) 36.97 Outstanding at June 30, 2019 1,046 $ 39.62 The total fair value of restricted stock awards vested during fiscal years 2019 , 2018 , and 2017 was $24,596 , $38,344 and $19,402 , respectively. Non-vested restricted stock awards are subject to the risk of forfeiture until the fulfillment of specified conditions. As of June 30, 2019 , there was $32,886 of total unrecognized compensation cost related to non-vested restricted stock awards granted under the Company’s stock plans that is expected to be recognized over a weighted-average period of 2.5 years from June 30, 2019 . As of June 30, 2018 , there was $24,740 of total unrecognized compensation cost related to non-vested restricted stock awards granted under the Company’s stock plans that is expected to be recognized over a weighted-average period of 2.3 years from June 30, 2018 . S TOCK - BASED C OMPENSATION E XPENSE The Company recognizes expense for its share-based payment plans in the consolidated statements of operations for the fiscal years 2019 and 2018 in accordance with ASC 718. The Company had $241 and $317 of capitalized stock-based compensation expense on the consolidated balance sheet as of June 30, 2019 and 2018 , respectively. Under the fair value recognition provisions of ASC 718, stock-based compensation cost is measured at the grant date based on the value of the award and is recognized as expense over the service period. The following table presents share-based compensation expenses from continuing operations included in the Company’s consolidated statement of operations: Year Ended June 30, 2019 2018 2017 Cost of revenues $ 820 $ 502 $ 531 Selling, general and administrative 16,188 14,828 13,212 Research and development 2,414 1,984 1,598 Stock-based compensation expense before tax 19,422 17,314 15,341 Income taxes (5,263 ) (5,713 ) (5,874 ) Stock-based compensation expense, net of income taxes $ 14,159 $ 11,601 $ 9,467

Operating Segment, Geographic I

Operating Segment, Geographic Information and Significant Customers	12 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Operating Segment, Geographic Information and Significant Customers	Operating Segment, Geographic Information and Significant Customers Operating segments are defined as components of an enterprise evaluated regularly by the Company's chief operating decision maker (“CODM”) in deciding how to allocate resources and assess performance. The Company is comprised of one operating and reportable segment. The Company utilized the management approach for determining its operating segment in accordance with ASC 280, Segment Reporting . The geographic distribution of the Company’s revenues as determined by order origination based on the country in which the Company's legal subsidiary is domiciled is summarized as follows: U.S. Europe Asia Pacific Eliminations Total YEAR ENDED JUNE 30, 2019 Net revenues to unaffiliated customers $ 599,422 $ 49,332 $ 5,990 $ — $ 654,744 Inter-geographic revenues 10,570 1,343 — (11,913 ) — Net revenues $ 609,992 $ 50,675 $ 5,990 $ (11,913 ) $ 654,744 Identifiable long-lived assets (1) $ 54,952 $ 5,037 $ 12 $ — $ 60,001 YEAR ENDED JUNE 30, 2018 Net revenues to unaffiliated customers $ 450,218 $ 35,000 $ 7,966 $ — $ 493,184 Inter-geographic revenues 10,650 925 — (11,575 ) — Net revenues $ 460,868 $ 35,925 $ 7,966 $ (11,575 ) $ 493,184 Identifiable long-lived assets (1) $ 47,997 $ 2,974 $ 9 $ — $ 50,980 YEAR ENDED JUNE 30, 2017 Net revenues to unaffiliated customers $ 380,538 $ 22,242 $ 5,808 $ — $ 408,588 Inter-geographic revenues 7,637 44 — (7,681 ) — Net revenues $ 388,175 $ 22,286 $ 5,808 $ (7,681 ) $ 408,588 Identifiable long-lived assets (1) $ 50,340 $ 1,288 $ 15 $ — $ 51,643 (1) Identifiable long-lived assets exclude goodwill and intangible assets. In recent years, the Company completed a series of acquisitions that changed its technological capabilities, applications and end markets. As these acquisitions and changes occurred, the Company increased the proportion of its revenue derived from the sale of components in different technological areas, and also increased the amount of revenue associated with combining technologies into more complex and diverse products including modules, sub-assemblies and integrated subsystems. The following tables present revenue consistent with the Company's strategy of expanding its technological capabilities and program content. As additional information related to the Company’s products by end user, application and/or product grouping is attained, the categorization of these products can vary over time. When this occurs, the Company reclassifies revenue by end user, application and/or product grouping for prior periods. Such reclassifications typically do not materially change the sizing of, or the underlying trends of results within, each revenue category. The following table presents the Company's net revenue by end market for the periods presented: Year Ended June 30, 2019 2018 2017 Domestic (1) $ 580,935 $ 410,050 $ 341,699 International/Foreign Military Sales (2) 73,809 83,134 66,889 Total Net Revenue $ 654,744 $ 493,184 $ 408,588 (1) Domestic revenues consist of sales where the end user is within the U.S., as well as sales to prime defense contractor customers where the ultimate end user location is not defined. (2) International/Foreign Military Sales consist of sales to U.S. prime defense contractor customers where the end user is outside the U.S., foreign military sales through the U.S. government, and direct sales to non-U.S. based customers intended for end use outside of the U.S. The following table presents the Company's net revenue by end application for the periods presented: Year Ended June 30, 2019 2018 2017 Radar (1) $ 164,046 $ 159,737 $ 150,441 Electronic Warfare (2) 128,841 114,801 106,446 Other Sensor and Effector (3) 90,245 48,088 27,719 Total Sensor and Effector 383,132 322,626 284,606 C4I (4) 183,172 87,414 31,679 Other (5) 88,440 83,144 92,303 Total Net Revenues $ 654,744 $ 493,184 $ 408,588 (1) Radar includes end-use applications where radio frequency signals are utilized to detect, track, and identify objects. (2) Electronic Warfare includes end-use applications comprising the offensive and defensive use of the electromagnetic spectrum. (3) Other Sensor and Effector products include all Sensor and Effector end markets other than Radar and Electronic Warfare. (4) C4I includes rugged secure rackmount servers that are designed to drive the most powerful military processing applications. (5) Other products include all component and other sales where the end use is not specified. The following table presents the Company's net revenue by product grouping for the periods presented: Year Ended June 30, 2019 2018 2017 Components (1) $ 184,870 $ 142,982 $ 105,669 Modules and Sub-assemblies (2) 180,873 194,377 161,973 Integrated Subsystems (3) 289,001 155,825 140,946 Total Net Revenues $ 654,744 $ 493,184 $ 408,588 (1) Components include technology elements typically performing a single, discrete technological function, which when physically combined with other components may be used to create a module or sub-assembly. Examples include but are not limited to power amplifiers and limiters, switches, oscillators, filters, equalizers, digital and analog converters, chips, MMICs (monolithic microwave integrated circuits), and memory and storage devices. (2) Modules and Sub-assemblies include combinations of multiple functional technology elements and/or components that work together to perform multiple functions but are typically resident on or within a single board or housing. Modules and sub-assemblies may in turn be combined to form an integrated subsystem. Examples of modules and sub-assemblies include but are not limited to embedded processing modules, embedded processing boards, switch fabric boards, high speed input/output boards, digital receiver boards, graphics and video processing and Ethernet and IO (input-output) boards, multi-chip modules, integrated radio frequency and microwave multi-function assemblies, tuners, and transceivers. (3) Integrated Subsystems include multiple modules and/or sub-assemblies combined with a backplane or similar functional element and software to enable a solution. These are typically but not always integrated within a chassis and with cooling, power and other elements to address various requirements and are also often combined with additional technologies for interaction with other parts of a complete system or platform. Integrated subsystems also include spare and replacement modules and sub-assemblies sold as part of the same program for use in or with integrated subsystems sold by the Company. Customers comprising 10% or more of the Company’s revenues for the periods shown below are as follows: Year Ended June 30, 2019 2018 2017 Raytheon Company 20 % 19 % 16 % Lockheed Martin Corporation 17 % 19 % 20 % 37 % 38 % 36 % While the Company typically has customers from which it derives 10% or more of its revenue, the sales to each of these customers are spread across multiple programs and platforms. There were no programs comprising 10% or more of the Company's revenues for the year ended June 30, 2019 , 2018 and 2017 .

Derivatives

Derivatives	12 Months Ended
	Jun. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	Derivatives The Company utilizes interest rate derivatives to mitigate interest rate exposure with respect to its financing arrangements. On January 11, 2019, the Company entered into an interest rate swap (the “Swap”) with Bank of America, N.A. for a notional amount of $175,000 in order to fix the interest rate associated with a portion of the Revolver. The Swap agreement was designated and qualified for hedge accounting treatment as a cash flow hedge. The Swap would have matured on September 28, 2023, coterminous with the maturity of the Revolver. The Swap established a fixed interest rate on the first $175,000 of the Company's outstanding borrowings against the Revolver obligation at 2.54% . The Company incurred $5,400 in expense associated with the termination of the interest rate swap in conjunction with leveraging the net proceeds generated by our follow-on equity offering to pay down the balance on the Revolver during the fourth quarter of fiscal 2019. There were no outstanding interest rate derivatives at June 30, 2019.

Subsequent Events

Subsequent Events	12 Months Ended
	Jun. 30, 2019
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On July 30, 2019, the Company announced the pending purchase agreement to acquire American Panel Corporation (“APC”). Based in Alpharetta, Georgia, APC is a leading innovator in large area display technology. Their capabilities are deployed on a wide range of Defense and Commercial aviation platforms. The Company's agreement to acquire APC is for an all cash purchase price of $ 100,000 , subject to net working capital and net debt adjustments. The acquisition and associated transaction expenses will be funded with cash on hand. Effective as of July 1, 2019, the Company's fiscal year has changed to the 52-week or 53-week period ending on the Friday closest to the last day in June. The Company has evaluated subsequent events from the date of the consolidated balance sheet through the date the consolidated financial statements were issued.

Supplementary Information (Unau

Supplementary Information (Unaudited)	12 Months Ended
	Jun. 30, 2019
Quarterly Financial Information Disclosure [Abstract]
Supplementary Information (Unaudited)	S UPPLEMENTARY I NFORMATION (U NAUDITED ) The following sets forth certain unaudited consolidated quarterly statements of operations data for each of the Company’s last eight quarters. In management’s opinion, this quarterly information reflects all adjustments, consisting only of normal recurring adjustments, necessary for a fair presentation for the periods presented. Such quarterly results are not necessarily indicative of future results of operations and should be read in conjunction with the audited consolidated financial statements of the Company and the notes thereto. 2019 (In thousands, except per share data) 1ST QUARTER 2ND QUARTER 3RD QUARTER 4TH QUARTER Net revenues $ 144,056 $ 159,089 $ 174,636 $ 176,963 Gross margin $ 61,583 $ 70,887 $ 73,847 $ 79,839 Income from operations $ 13,810 $ 19,861 $ 22,062 $ 20,851 Income before income taxes $ 10,608 $ 16,866 $ 19,466 $ 12,587 Income tax provision (benefit) $ 3,129 $ 4,483 $ 5,357 $ (217 ) Net income $ 7,479 $ 12,383 $ 14,109 $ 12,804 Net income per share: Basic net income per share $ 0.16 $ 0.26 $ 0.30 $ 0.26 Diluted net income per share $ 0.16 $ 0.26 $ 0.29 $ 0.25 2018 (In thousands, except per share data) 1ST QUARTER 2ND QUARTER 3RD QUARTER 4TH QUARTER Net revenues $ 106,069 $ 117,912 $ 116,336 $ 152,867 Gross margin $ 50,674 $ 54,160 $ 52,766 $ 68,258 Income from operations $ 10,371 $ 10,888 $ 6,838 $ 18,888 Income before income taxes $ 9,572 $ 10,468 $ 5,905 $ 16,628 Income tax (benefit) provision $ (8,381 ) $ 1,335 $ 2,209 $ 6,527 Net income $ 17,953 $ 9,133 $ 3,696 $ 10,101 Net income per share: Basic net income per share $ 0.39 $ 0.20 $ 0.08 $ 0.22 Diluted net income per share $ 0.38 $ 0.19 $ 0.08 $ 0.21 Due to the effects of rounding, the sum of the four quarters does not equal the annual total.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Receivables, Policy [Policy Text Block]
Principles Of Consolidation	P RINCIPLES OF C ONSOLIDATION The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany transactions and balances have been eliminated.
Business Combinations	B USINESS C OMBINATIONS The Company utilizes the acquisition method of accounting under ASC 805, Business Combinations, (“ASC 805”), for all transactions and events which it obtains control over one or more other businesses, to recognize the fair value of all assets and liabilities acquired, even if less than one hundred percent ownership is acquired, and in establishing the acquisition date fair value as of the measurement date for all assets and liabilities assumed. The Company also utilizes ASC 805 for the initial recognition and measurement, subsequent measurement and accounting, and disclosure of assets and liabilities arising from contingencies in business combinations. Other estimates include: • estimated step-ups for fixed assets and inventory; • estimated fair values of intangible assets; and • estimated income tax assets and liabilities assumed from the acquiree. While the Company uses its best estimates and assumptions as part of the purchase price allocation process to accurately value assets acquired and liabilities assumed at the business acquisition date, the estimates and assumptions are inherently uncertain and subject to refinement. As a result, during the purchase price allocation period, which is generally one year from the business acquisition date, the Company records adjustments to the assets acquired and liabilities assumed, with the corresponding offset to goodwill. For changes in the valuation of intangible assets between the preliminary and final purchase price allocation, the related amortization is adjusted in the period it occurs. Subsequent to the purchase price allocation period, any adjustment to assets acquired or liabilities assumed is included in operating results in the period in which the adjustment is determined.
Use Of Estimates	U SE OF E STIMATES The preparation of financial statements in conformity with Generally Accepted Accounting Principles (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the dates of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from those estimates.
Revenue Recognition	R EVENUE R ECOGNITION The Company recognizes revenue in accordance with ASC 606, Revenue from Contracts with Customers , (“ASC 606”), which was adopted on July 1, 2018, using the retrospective method. Revenue is recognized in accordance with the five step model set forth by ASC 606, which involves identification of the contract(s), identification of performance obligations in the contract, determination of the transaction price, allocation of the transaction price to the previously identified performance obligations, and revenue recognition as the performance obligations are satisfied. The adoption of ASC 606 did not have a material impact to the amount or timing of revenue recognition related to the Company's legacy accounting methods for contracts including ship and bill, multiple-deliverable, and contract accounting. Such adoption did not have a material impact, individually or in the aggregate, to any amounts in the Company's Consolidated Balance Sheets, Consolidated Statements of Operations and Comprehensive Income, Consolidated Statements of Shareholders’ Equity or Consolidated Statements of Cash Flows. Refer to Note P for disaggregation of revenue for the period. During step one of the five step model, the Company considers whether contracts should be combined or segmented, and based on this assessment, the Company combines closely related contracts when all the applicable criteria are met. The combination of two or more contracts requires judgment in determining whether the intent of entering into the contracts was effectively to enter into a single contract, which should be combined to reflect an overall profit rate. Similarly, the Company may separate an arrangement, which may consist of a single contract or group of contracts, with varying rates of profitability, only if the applicable criteria are met. Judgment also is involved in determining whether a single contract or group of contracts may be segmented based on how the arrangement and the related performance criteria were negotiated. The decision to combine a group of contracts or segment a contract could change the amount of revenue and gross profit recorded in a given period. A performance obligation is a promise in a contract to transfer a distinct good or service to the customer. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue when the performance obligation is satisfied. Certain contracts with customers require the Company to perform tests of its products prior to shipment to ensure their performance complies with the Company’s published product specifications and, on occasion, with additional customer-requested specifications. In these cases, the Company conducts such tests and, if they are completed successfully, includes a written confirmation with each order shipped. As a result, at the time of each product shipment, the Company believes that no further customer testing requirements exist and that there is no uncertainty of acceptance by its customer. The Company's contracts with customers generally do not include a right of return relative to delivered products. In certain cases, contracts are modified to account for changes in the contract specifications or requirements. In most instances, contract modifications are accounted for as part of the existing contract. Certain contracts with customers have options for the customer to acquire additional goods or services. In most cases the pricing of these options are reflective of the standalone selling price of the good or service. These options do not provide the customer with a material right and are accounted for only when the customer exercises the option to purchase the additional goods or services. If the option on the customer contract was not indicative of the standalone selling price of the good or service, the material right would be accounted for as a separate performance obligation. The Company is a leading provider of secure sensor and safety-critical mission processing subsystems. Revenues are derived from the sales of products that are grouped into one of the following three categories: (i) components; (ii) modules and sub-assemblies; and (iii) integrated subsystems. The Company also generates revenues from the performance of services, including systems engineering support, consulting, maintenance and other support, testing and installation. Each promised good or service within a contract is accounted for separately under the guidance of ASC 606 if they are distinct, i.e., if a good or service is separately identifiable from other items in the contract and if a customer can benefit from it on its own or with other resources that are readily available to the customer. Promised goods or services not meeting the criteria for being a distinct performance obligation are bundled into a single performance obligation with other goods or services that together meet the criteria for being distinct. The appropriate allocation of the transaction price and recognition of revenue is then determined for the bundled performance obligation. Once the Company identifies the performance obligations, the Company then determines the transaction price, which includes estimating the amount of variable consideration to be included in the transaction price, if any. Variable consideration typically arises due to volume discounts, or other provisions that can either decrease or increase the transaction price. To the extent the transaction price includes variable consideration, the Company estimates the amount of variable consideration that should be included in the transaction price utilizing either the expected value method or the most likely amount method depending on the method the Company expects to better predict the amount of consideration to which it will be entitled. The determination of the estimates for variable consideration require judgment, and are based on past history with similar contracts and anticipated performance. Further, variable consideration is only included in the determination of the transaction price if it is probable that a significant reversal in the amount of revenue recognized will not occur. There are no constraints on the variable consideration recorded. For contracts with multiple performance obligations, the transaction price is allocated to each performance obligation using the standalone selling price of each distinct good or service in the contract. Standalone selling prices of the Company’s goods and services are generally not directly observable. Accordingly, the primary method used to estimate standalone selling price is the expected cost plus a margin approach, under which the Company forecasts the expected costs of satisfying a performance obligation and then adds an appropriate margin for that distinct good or service. The objective of the expected cost plus a margin approach is to determine the price at which the Company would transact if the product or service were sold by the Company on a standalone basis. The Company's determination of the expected cost plus a margin approach involves the consideration of several factors based on the specific facts and circumstances of each contract. Specifically, the Company considers the cost to produce the deliverable, the anticipated margin on that deliverable, the selling price and profit margin for similar parts, the Company’s ongoing pricing strategy and policies, often based on the price list established and updated by management on a regular basis, the value of any enhancements that have been built into the deliverable and the characteristics of the varying markets in which the deliverable is sold. The Company analyzes the standalone selling prices used in its allocation of transaction price on contracts at least annually. Standalone selling prices will be analyzed on a more frequent basis if a significant change in the Company’s business necessitates a more frequent analysis or if the Company experiences significant variances in its selling prices. Revenue recognized at a point in time generally relates to contracts that include a combination of components, modules and sub-assemblies, integrated subsystems and related system integration or other services. Contracts with distinct performance obligations recognized at a point in time, with or without an allocation of the transaction price, totaled 77% , 79% and 77% of revenues in the years ended June 30, 2019, 2018, and 2017, respectively. Revenue is recognized at a point in time for these products and services (versus over time recognition) due to the following: (i) customers are only able to consume the benefits provided by the Company upon completion of the product or service; (ii) customers do not control the product or service prior to completion; and (iii) the Company does not have an enforceable right to payment at all times for performance completed to date. Accordingly, there is little judgment in determining when control of the good or service transfers to the customer, and revenue is generally recognized upon shipment (for goods) or completion (for services). The Company engages in long-term contracts for development, production and service activities and recognizes revenue for performance obligations over time. These long-term contracts involve the design, development, manufacture, or modification of complex modules and sub-assemblies or integrated subsystems and related services. Revenue is recognized over time, due to the fact that: (i) the Company’s performance creates or enhances an asset that the customer controls as the asset is created or enhanced; and (ii) the Company’s performance creates an asset with no alternative use to the Company and the Company has an enforceable right to payment for performance completed to date. The Company considers the nature of these contracts and the types of products and services provided when determining the proper accounting for a particular contract. These contracts include both fixed-price and cost reimbursable contracts. The Company’s cost reimbursable contracts typically include cost-plus fixed fee and time and material (“T&M”) contracts. For long-term contracts, the Company typically leverages the input method, using a cost-to-cost measure of progress. The Company believes that this method represents the most faithful depiction of the Company’s performance because it directly measures value transferred to the customer. Contract estimates and estimates of any variable consideration are based on various assumptions to project the outcome of future events that may span several years. These assumptions include: the amount of time to complete the contract, including the assessment of the nature and complexity of the work to be performed; the cost and availability of materials; the availability of subcontractor services and materials; and the availability and timing of funding from the customer. The Company bears the risk of changes in estimates to complete on a fixed-price contract which may cause profit levels to vary from period to period. For cost reimburseable contracts, the Company is reimbursed periodically for allowable costs and is paid a portion of the fee based on contract progress. In the limited instances where the Company enters into T&M contracts, revenue recognized reflects the number of direct labor hours expended in the performance of a contract multiplied by the contract billing rate, as well as reimbursement of other direct billable costs. For T&M contracts, the Company elected to use a practical expedient permitted by ASC 606 whereby revenue is recognized in the amount for which the Company has a right to invoice the customer based on the control transferred to the customer. For all types of contracts, the Company recognizes anticipated contract losses as soon as they become known and estimable. Accounting for long-term contracts requires significant judgment relative to estimating total contract revenues and costs, in particular, assumptions relative to the amount of time to complete the contract, including the assessment of the nature and complexity of the work to be performed. The Company’s estimates are based upon the professional knowledge and experience of its engineers, program managers and other personnel, who review each long-term contract monthly to assess the contract’s schedule, performance, technical matters and estimated cost at completion. Changes in estimates are applied retrospectively and when adjustments in estimated contract costs are identified, such revisions may result in current period adjustments to earnings applicable to performance in prior periods. Total revenue recognized under long-term contracts over time was 23% , 21% and 23% of revenues in the years ended June 30, 2019, 2018, and 2017, respectively. The Company generally does not provide its customers with rights of product return other than those related to assurance warranty provisions that permit repair or replacement of defective goods over a period of 12 to 36 months . The Company accrues for anticipated warranty costs upon product shipment. The Company does not consider activities related to such assurance warranties, if any, to be a separate performance obligation. The Company does offer separately priced extended warranties which generally range from 12 to 36 months that are treated as separate performance obligations. The transaction price allocated to extended warranties is recognized over time in proportion to the costs expected to be incurred in satisfying the obligations under the contract. On long-term contracts, the portion of the payments retained by the customer is not considered a significant financing component because most contracts have a duration of less than one year and payment is received as progress is made. Many of the Company's long-term contracts have milestone payments, which align the payment schedule with the progress towards completion on the performance obligation. On some contracts, the Company may be entitled to receive an advance payment, which is not considered a significant financing component because it is used to facilitate inventory demands at the onset of a contract and to safeguard the Company from the failure of the other party to abide by some or all of their obligations under the contract. All revenues are reported net of government assessed taxes (e.g., sales taxes or value-added taxes).
Cash And Cash Equivalents	C ASH AND C ASH E QUIVALENTS Cash equivalents, consisting of highly liquid money market funds and U.S. government and U.S. government agency issues with original maturities of 90 days or less at the date of purchase, are carried at fair market value which approximates cost.
Fair Value Measurement, Policy [Policy Text Block]	F AIR V ALUE OF F INANCIAL I NSTRUMENTS The Company measures at fair value certain financial assets and liabilities, including cash equivalents, restricted cash and contingent consideration. ASC 820, Fair Value Measurement and Disclosures , specifies a hierarchy of valuation techniques based on whether the inputs to those valuation techniques are observable or unobservable. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect the Company’s market assumptions. These two types of inputs have created the following fair-value hierarchy: Level 1—Quoted prices for identical instruments in active markets; Level 2—Quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets; and Level 3—Valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable.
Concentration Of Credit Risk	C ONCENTRATION OF C REDIT R ISK Financial instruments that potentially expose the Company to concentrations of credit risk consist principally of cash, cash equivalents and accounts receivable. The Company places its cash and cash equivalents with financial institutions of high credit quality. At June 30, 2019 and 2018 , the Company had $257,932 and $66,521 , respectively, of cash and cash equivalents on deposit or invested with its financial and lending institutions. The Company provides credit to customers in the normal course of business. The Company performs ongoing credit evaluations of its customers’ financial condition and limits the amount of credit extended when deemed necessary. At June 30, 2019 , five customers accounted for 56% of the Company's accounts receivable, unbilled receivables and costs in excess of billings. At June 30, 2018 , five customers accounted for 54% of the Company’s accounts receivable, unbilled receivables and costs in excess of billings.
Inventory	I NVENTORY Inventory is stated at the lower of cost (first-in, first-out) or net realizable value, and consists of materials, labor and overhead. On a quarterly basis, the Company evaluates inventory for net realizable value. Once an item is written down, the value becomes the new inventory cost basis. The Company reduces the value of inventory for excess and obsolete inventory, consisting of on-hand and non-cancelable on-order inventory in excess of estimated usage. The excess and obsolete inventory evaluation is based upon assumptions about future demand, product mix and possible alternative uses.
Goodwill And Acquired Intangible Assets	G OODWILL AND I NTANGIBLE A SSETS Goodwill is the amount by which the cost of the net assets obtained in a business acquisition exceeded the fair values of the net identifiable assets on the date of purchase (see Note G). Goodwill is not amortized in accordance with the requirements of ASC 350, Intangibles-Goodwill and Other (“ASC 350”). Goodwill is assessed for impairment at least annually, on a reporting unit basis, or when events and circumstances occur indicating that the recorded goodwill may be impaired. If the book value of a reporting unit exceeds its fair value, the implied fair value of goodwill is compared with the carrying amount of goodwill. If the carrying amount of goodwill exceeds the implied fair value, an impairment loss is recorded in an amount equal to that excess. Intangible assets result from the Company’s various business acquisitions (see Note H) and certain licensed technologies, and consist of identifiable intangible assets, including completed technology, licensing agreements, patents, customer relationships, trademarks, backlog, and non-compete agreements. Intangible assets are reported at cost, net of accumulated amortization and are either amortized on a straight-line basis over their estimated useful lives of up to 12.5
Long-Lived Assets	L ONG - LIVED A SSETS Long-lived assets primarily include property and equipment and acquired intangible assets. The Company regularly evaluates its long-lived assets for events and circumstances that indicate a potential impairment in accordance with ASC 360, Property, Plant, and Equipment (“ASC 360”). The Company reviews long-lived assets for impairment whenever events or changes in business circumstances indicate that the carrying amount of the assets may not be fully recoverable or that the useful lives of these assets are no longer appropriate. Each impairment test is based on a comparison of the estimated undiscounted cash flows of the asset as compared to the recorded value of the asset. If impairment is indicated, the asset is written down to its estimated fair value.
Property And Equipment	Property and equipment are the long-lived, physical assets of the Company acquired for use in the Company’s normal business operations and are not intended for resale by the Company. These assets are recorded at cost. Renewals and betterments that increase the useful lives of the assets are capitalized. Repair and maintenance expenditures that increase the efficiency of the assets are expensed as incurred. Equipment under capital lease is recorded at the present value of the minimum lease payments required during the lease period. Depreciation is based on the estimated useful lives of the assets using the straight-line method (see Note F). As assets are retired or sold, the related cost and accumulated depreciation are removed from the accounts and any resulting gain or loss is included in the results of operations. Expenditures for major software purchases and software developed for internal use are capitalized and depreciated using the straight-line method over the estimated useful lives of the related assets, which are generally three years . For software developed for internal use, all external direct costs for material and services and certain payroll and related fringe benefit costs are capitalized in accordance with ASC 350. During fiscal 2019 , 2018 and 2017 , the Company capitalized $749 , $733 and $508 of software development costs.
Deferred Revenues And Customer Advances
Income Taxes	I NCOME T AXES The Company accounts for income taxes under ASC 740, Income Taxes (“ASC 740”). The Company recognizes deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the Company’s consolidated financial statements. Under this method, deferred tax assets and liabilities are determined based on the difference between the financial statement and tax basis of assets and liabilities using enacted tax rates for the year in which the differences are expected to reverse. The Company records a valuation allowance against net deferred tax assets if, based upon the available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized. ASC 740 requires a two-step approach to recognizing and measuring uncertain tax positions. First, the tax position must be evaluated to determine the likelihood that it will be sustained upon external examination. If the tax position is deemed more-likely-than-not to be sustained, the tax position is then assessed to determine the amount of benefit to recognize in the financial statements. The amount of the benefit that may be recognized is the largest amount that has a greater than 50% likelihood of being realized upon ultimate settlement. The Company recognizes interest and penalties accrued on any unrecognized tax benefits as a component of income tax expense.
Product Warranty Accrual	P RODUCT W ARRANTY A CCRUAL The Company’s product sales generally include a 12 to 36
Research And Development Costs	R ESEARCH AND D EVELOPMENT C OSTS Research and development costs are expensed as incurred. Research and development costs are primarily made up of labor charges and prototype material and development expenses.
Stock-Based Compensation	S TOCK - BASED C OMPENSATION Stock-based compensation cost is measured at the grant date based on the fair value of the award and is recognized as expense over the requisite service period, which generally represents the vesting period, and includes an estimate of the awards that will be forfeited. Stock-based compensation expense for the Company’s performance-based restricted stock awards are amortized over the requisite service period using graded vesting. The Company’s other restricted stock awards recognize expense over the requisite service period on a straight-line basis. The Company uses the Black-Scholes valuation model for estimating the fair value on the date of grant of stock options.
Segment Reporting, Policy [Policy Text Block]	S EGMENT I NFORMATION The Company uses the management approach for segment disclosure, which designates the internal organization that is used by management for making operating decisions and assessing performance as the source of its reportable segments. The Company manages its business on the basis of one reportable segment, as a leading commercial provider of secure sensor and safety critical mission processing subsystems for a broad range of critical aerospace, defense and intelligence programs.
Retirement of Common Stock	R ETIREMENT OF C OMMON S TOCK Stock that is repurchased or received in connection with the exercise of stock options or in order to cover tax payment obligations triggered by exercise of stock options or the vesting of restricted stock is retired immediately upon the Company’s repurchase. The Company accounts for this under the cost method and upon retirement the excess amount over par value is charged against additional paid-in capital.
Net Earnings Per Share	N ET E ARNINGS P ER S HARE
Accumulated Other Comprehensive Income	A CCUMULATED O THER C OMPREHENSIVE I NCOME ( L OSS) Accumulated other comprehensive income (loss) (“AOCI”) includes foreign currency translation adjustments and pension benefit plan adjustments. The components of accumulated other comprehensive (loss) income included $(232) , $(137) and $(93) of foreign currency translation adjustments for the years ended June 30, 2019 , 2018 and 2017, respectively. In addition, pension benefit plan adjustments totaled $(2,350) , $354 and $220 for the years ended June 30, 2019, 2018 and 2017 respectively. There were no material net unrealized gains on investments for the years ended June 30, 2019 , 2018 and 2017.
Foreign Currency	F OREIGN C URRENCY Local currencies are the functional currency for the Company’s subsidiaries in Switzerland, the United Kingdom, France, Japan, Spain and Canada. The accounts of foreign subsidiaries are translated using exchange rates in effect at period-end for assets and liabilities and at average exchange rates during the period for results of operations. The related translation adjustments are reported in accumulated other comprehensive income in shareholders’ equity. Gains (losses) resulting from non-U.S. currency transactions are included in other (expense) income, net in the Consolidated Statements of Operations and Comprehensive Income and were immaterial for all periods presented.
Recently Issued Accounting Pronouncements	R ECENTLY I SSUED A CCOUNTING P RONOUNCEMENTS In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) , an amendment of the FASB Accounting Standards Codification. This ASU requires lessees to recognize a right-of-use asset and lease liability for most lease arrangements. The new standard is effective for the Company on July 1, 2019. The standard mandates a modified retrospective transition method for all entities and early adoption is permitted. This ASU, among other things, allows companies to elect an optional transition method to apply the new lease standard through a cumulative-effect adjustment in the period of adoption. The Company plans to adopt the new standard using the optional transition method. As of June 30, 2019 , the Company had $69,630 of future minimum lease payments under non-cancelable operating leases, primarily for facilities. The future minimum lease payments have not yet been adjusted to the present value, as the Company is still assessing the impact of each applicable discount rate. The Company will leverage the rate implicit in the lease unless that rate cannot be readily determined, in which case the Company's incremental borrowing rate will be used to determine the discount rate applicable for the calculation of our lease liabilities. See Note K to consolidated financial statements for more information about the timing and amount of future operating lease payments, which the Company believes is indicative of the materiality of adoption of the ASU to the Company's consolidated financial statements. The Company intends to elect the package of practical expedients which allows the Company to not reassess 1) whether any expired or existing contracts are or contain leases; 2) the lease classification for any expired or existing leases; and 3) initial direct costs for any existing leases. The Company has completed the identification of the population of leases subject to the ASU and is in the process of calculating the financial impact that the adoption will have on its consolidated financial statements and related disclosures. In January 2017, the FASB issued ASU No. 2017-04, Intangibles—Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment , an amendment of the FASB Accounting Standards Codification. This ASU eliminates the requirement to measure the implied fair value of goodwill by assigning the fair value of a reporting unit to all assets and liabilities within that unit (“the Step 2 test”) from the goodwill impairment test. Instead, if the carrying amount of a reporting unit exceeds its fair value, an impairment loss is recognized in an amount equal to that excess, limited by the amount of goodwill in that reporting unit. For public business entities, the new standard is effective for its annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019. The ASU requires prospective adoption and permits early adoption for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The Company does not expect this guidance to have a material impact to its consolidated financial statements. In March 2018, the FASB issued ASU No. 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220) Reclassification of Certain Tax Effects for Accumulated Other Comprehensive Income , an amendment of the FASB Accounting Standards Codification. This ASU permits a company to reclassify the disproportionate income tax effects of the Tax Cuts and Jobs Act of 2017 on items within AOCI to retained earnings. The amounts applicable for reclassification should include the effect of the change in the U.S. Federal corporate income tax rate on the gross deferred tax amounts and related valuation allowances, if any, at the date of the enactment of the Tax Cuts and Jobs Act of 2017 related to the items remaining in AOCI. The effect of the change in the U.S. Federal corporate income tax rate on gross valuation allowances that were originally charged to income from continuing operations shall not be included. For all entities, the new standard is effective for fiscal years beginning after December 15, 2018, including interim periods within that annual period, and early adoption is permitted. The Company is evaluating the effect that ASU 2018-02 will have on its consolidated financial statements and related disclosures. In August 2018, the FASB issued ASU No. 2018-14, Compensation—Retirement Benefits—Defined Benefit Plans—General (Topic 715) Changes to the Disclosure Requirements for Defined Benefit Plans , an amendment of the FASB Accounting Standards Codification. The amendments in this ASU remove disclosures that no longer are considered cost-beneficial, clarify the specific requirements of disclosures, and add disclosure requirements identified as relevant. For public business entities, the standard is effective for fiscal years ending after December 15, 2020. The ASU requires retrospective adoption and permits early adoption for all entities. The Company does not expect this guidance to have a material impact to its consolidated financial statements or related disclosures. In August 2018, the FASB issued ASU No. 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40) , an amendment of the FASB Accounting Standards Codification. The ASU provides guidance to determine whether to capitalize implementation costs of cloud computing arrangement that is a service contract or expense as incurred. Costs of arrangements that do not include a software license should be accounted for as a service contract and expensed as incurred. This ASU is effective for fiscal years beginning after December 15, 2019, with early adoption permitted. The ASU permits two methods of adoption: prospectively to all implementation costs incurred after the date of adoption, or retrospectively to each prior reporting period presented. The Company does not expect this guidance to have a material impact to its consolidated financial statements or related disclosures. R ECENTLY A DOPTED A CCOUNTING P RONOUNCEMENTS Effective July 1, 2018, the Company adopted ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) , which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The ASU replaces most existing revenue recognition guidance in GAAP. The new standard permits adoption by using either (i) a retrospective approach for all periods presented in the period of adoption or (ii) a modified retrospective approach with the cumulative effect of initially applying the new standard recognized at the date of initial application and providing certain additional disclosures. In accordance with this standard, the Company has adopted the new standard using the retrospective method. The Company has completed the assessment phase and implemented the new standard accordingly. Further, it has evaluated the Company's policies in relation to its internal controls framework. This assessment included identification, consideration, and quantification of the impact of the new standard on our financial statements, accounting policies, processes, control environment and systems. The outcome of this assessment included implementation of supporting processes and systems that enable timely and accurate reporting under the new standard. Adoption of the new standard did not result in a significant change in the Company's control environment. Such adoption has resulted in additional disclosures around the nature and timing of our performance obligations, contract liabilities, deferred contract cost assets, as well as significant judgments and practical expedients used by us. The Company has applied the standard’s practical expedient that permits the omission of prior-period information about our remaining performance obligations. The Company has also elected to use a practical expedient available under the new standard whereby contracts with original expected durations of one year or less are excluded from the Company's remaining performance obligations. Adoption of the new standard did not have a material impact to the amount or timing of revenue recognition related to the Company's legacy accounting methods for contracts including ship and bill, multiple-deliverable, and contract accounting, which encompassed the legacy percentage-of-completion, completed contract and time and materials methods. For T&M contracts, the Company has elected to use a practical expedient permitted by the new standard whereby revenue is recognized in the amount for which the Company has a right to invoice the customer based on the control transferred to the customer. Such adoption did not have a material impact to its consolidated financial statements. In connection with the adoption of the new standard, there is a requirement to capitalize certain incremental costs of obtaining a contract, which for the Company, primarily comprises commission expenses for internal and external sales representatives. Any such costs required to be capitalized would be amortized over the period of performance for the underlying contracts. The Company has elected the practical expedient under the new standard whereby costs associated with contracts that have a duration less than one year are expensed as incurred. The Company has completed the evaluation of capitalizing costs to obtain a contract, noting that the impact related to these costs would be limited to commissions on contracts with a duration exceeding one year. The impact was not material to its consolidated financial statements. Effective July 1, 2018, the Company adopted ASU No. 2016-15, Classification of Certain Cash Receipts and Cash Payments , an amendment of the FASB Accounting Standards Codification. This ASU will reduce diversity in practice for classifying cash payments and receipts in the statement of cash flows for a number of common transactions. It will also clarify when identifiable cash flows should be separated versus classified based on their predominant source or use. Such adoption has not and will not have any impact to its consolidated financial statements. Effective July 1, 2018, we adopted ASU No. 2016-16, Intra-Entity Transfers of Assets Other Than Inventory, an amendment of the FASB Accounting Standards Codification. This ASU requires the seller and buyer to recognize at the transaction date the current and deferred income tax consequences of intercompany asset transfers (except transfers of inventory). Under current U.S. GAAP, the seller and buyer defer the consolidated tax consequences of an intercompany asset transfer from the period of the transfer to a future period when the asset is transferred out of the consolidated group, or otherwise affects consolidated earnings. This standard will cause volatility in companies’ effective tax rates, particularly for those that transfer intangible assets to foreign subsidiaries. Such adoption has not and will not have any impact to the Company's consolidated financial statements. Effective July 1, 2018, we adopted ASU No. 2017-07, Compensation Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost , an amendment of the FASB Accounting Standards Codification. This ASU requires employers that sponsor defined benefit pension and/or other post-retirement benefit plans to report the service cost component of net benefit cost in the same line item as other compensation costs arising from services rendered by the pertinent employees during the period. Employers are required to present the other components of net benefit costs in the income statement separately from the service cost component and outside a subtotal of income from operations. Additionally, only the service cost component of net periodic pension cost will be eligible for asset capitalization. The ASU should be applied retrospectively for the presentation of the service cost component and the other components of net periodic pension cost and net periodic postretirement benefit cost in the income statement and prospectively, on and after the effective date, for the capitalization of the service cost component of net periodic pension cost and net periodic postretirement benefit in assets. Such adoption has not and will not have a material impact to the Company's consolidated financial statements. Effective January 1, 2019, the Company adopted ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities , an amendment of the FASB Accounting Standards Codification. This ASU provides improved financial reporting of hedging relationships to better portray the economic result of an entity's risk management activities in its financial statements. In addition, the amendments in this update make certain targeted improvements to simplify the application of hedge accounting guidance. The ASU requires modified retrospective adoption and permits early adoption in any interim period after issuance of the ASU. Disclosures reflect the adoption of ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities , in the third quarter of fiscal 2019. Prior period amounts have not been restated. See Note Q for additional disclosures. Effective January 1, 2019, the Company adopted SEC Final Rule 33-10532, Disclosure Update and Simplification
Employee Benefit Plans	The Company recognizes a net asset or liability for the Plan equal to the difference between the projected benefit obligation of the Plan and the fair value of the Plan’s assets as required by ASC 715. The funded status may vary from year to year due to changes in the fair value of the Plan’s assets and variations on the underlying assumptions of the projected benefit obligation of the Plan.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Schedule of Product Warranty Liability	The following table presents the changes in the Company's product warranty accrual. Fiscal Fiscal Fiscal Beginning balance at July 1, $ 1,336 $ 1,691 $ 1,523 Warranty assumed from Germane 169 — — Warranty assumed from Themis — 117 — Warranty assumed from CES — — 176 Warranty assumed from Delta — — 30 Accruals for warranties issued during the period 2,274 1,318 1,328 Settlements made during the period (1,909 ) (1,790 ) (1,366 ) Ending balance at June 30, $ 1,870 $ 1,336 $ 1,691
Basic and Diluted Weighted Average Shares Outstanding	Basic and diluted weighted average shares outstanding were as follows: Years Ended June 30, 2019 2018 2017 Basic weighted-average shares outstanding 47,831 46,719 41,986 Effect of dilutive equity instruments 669 752 1,032 Diluted weighted-average shares outstanding 48,500 47,471 43,018

Acquisitions (Tables)

Acquisitions (Tables)	12 Months Ended
	Jun. 30, 2019
Business Combinations [Abstract]
Schedule of Assets Acquired and Liabilities Assumed	The following table presents the net purchase price and the fair values of the assets and liabilities of Syntonic on a preliminary basis: Amounts Consideration transferred Cash paid at closing $ 13,118 Less cash acquired (1,118 ) Net purchase price $ 12,000 Estimated fair value of tangible assets acquired and liabilities assumed Cash $ 1,118 Accounts receivable 281 Inventory 482 Fixed assets 31 Other current and non-current assets 6 Accounts payable (71 ) Accrued expenses (61 ) Estimated fair value of net tangible assets acquired 1,786 Estimated fair value of identifiable intangible assets 7,100 Estimated goodwill 4,232 Estimated fair value of net assets acquired 13,118 Less cash acquired (1,118 ) Net purchase price $ 12,000 The following table presents the net purchase price and the fair values of the assets and liabilities of Athena on a preliminary basis: Amounts Consideration transferred Cash paid at closing $ 34,049 Working capital and net debt adjustment (446 ) Less cash acquired (49 ) Net purchase price $ 33,554 Estimated fair value of tangible assets acquired and liabilities assumed Cash $ 49 Accounts receivable 726 Fixed assets 74 Other current and non-current assets 260 Accounts payable (48 ) Accrued expenses (143 ) Other current and non-current liabilities (600 ) Deferred tax liability (6,414 ) Estimated fair value of net tangible liabilities acquired (6,096 ) Estimated fair value of identifiable intangible assets 23,700 Estimated goodwill 15,999 Estimated fair value of net assets acquired 33,603 Less cash acquired (49 ) Net purchase price $ 33,554 The following table presents the net purchase price and the fair values of the assets and liabilities of GECO on a preliminary basis: Amounts Consideration transferred Cash paid at closing $ 36,500 Net purchase price $ 36,500 Estimated fair value of tangible assets acquired and liabilities assumed Accounts receivable $ 1,320 Inventory 1,454 Fixed assets 459 Accounts payable (217 ) Accrued expenses (239 ) Estimated fair value of net tangible assets acquired 2,777 Estimated fair value of identifiable intangible assets 12,500 Estimated goodwill 21,223 Estimated fair value of net assets acquired 36,500 Net purchase price $ 36,500 The following table presents the net purchase price and the fair values of the assets and liabilities of Themis: Amounts Consideration transferred Cash paid at closing $ 187,089 Working capital and net debt adjustment (1,274 ) Less cash acquired (6,810 ) Net purchase price $ 179,005 Fair value of tangible assets acquired and liabilities assumed Cash $ 6,810 Accounts receivable 7,713 Inventory 7,333 Fixed assets 479 Other current and non-current assets 2,896 Accounts payable (3,287 ) Accrued expenses (5,319 ) Other current and non-current liabilities (1,210 ) Deferred tax liability (14,307 ) Fair value of net tangible assets acquired 1,108 Fair value of identifiable intangible assets 71,720 Goodwill 112,987 Fair value of net assets acquired 185,815 Less cash acquired (6,810 ) Net purchase price $ 179,005 The following table presents the net purchase price and the fair values of the assets and liabilities of Germane on a preliminary basis: Amounts Consideration transferred Cash paid at closing $ 47,166 Working capital and net debt adjustment (1,244 ) Less cash acquired (193 ) Net purchase price $ 45,729 Estimated fair value of tangible assets acquired and liabilities assumed Cash $ 193 Accounts receivable 4,277 Inventory 8,575 Fixed assets 867 Other current and non-current assets 596 Accounts payable (3,146 ) Accrued expenses (1,229 ) Other current and non-current liabilities (232 ) Estimated fair value of net tangible assets acquired 9,901 Estimated fair value of identifiable intangible assets 12,910 Estimated goodwill 23,111 Estimated fair value of net assets acquired 45,922 Less cash acquired (193 ) Net purchase price $ 45,729

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Summary of Financial Assets Measured at Fair Value on Recurring Basis	The following table summarizes the Company’s financial assets measured at fair value on a recurring basis at June 30, 2019 : Fair Value Measurements June 30, 2019 Level 1 Level 2 Level 3 Assets: Certificates of deposit $ 31,522 $ — $ 31,522 $ — Total $ 31,522 $ — $ 31,522 $ — The following table summarizes the Company’s financial assets measured at fair value on a recurring basis at June 30, 2018: Fair Value Measurements June 30, 2018 Level 1 Level 2 Level 3 Assets: Certificates of deposit $ 1,056 $ — $ 1,056 $ — Total $ 1,056 $ — $ 1,056 $ —

Inventory (Tables)

Inventory (Tables)	12 Months Ended
	Jun. 30, 2019
Inventory Disclosure [Abstract]
Inventory	Inventory was comprised of the following: June 30, 2019 2018 Raw materials $ 84,561 $ 61,748 Work in process 38,525 30,841 Finished goods 14,026 15,996 Total $ 137,112 $ 108,585

Property and Equipment (Tables)

Property and Equipment (Tables)	12 Months Ended
	Jun. 30, 2019
Property, Plant and Equipment [Abstract]
Property and Equipment	Property and equipment consisted of the following: Estimated Useful Lives (Years) June 30, 2019 2018 Computer equipment and software 3-4 $ 78,195 $ 71,799 Furniture and fixtures 5 5,330 4,927 Leasehold improvements lesser of estimated useful life or lease term 25,646 21,552 Machinery and equipment 5-10 63,792 47,419 172,963 145,697 Less: accumulated depreciation (112,962 ) (94,717 ) $ 60,001 $ 50,980

Goodwill (Tables)

Goodwill (Tables)	12 Months Ended
	Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in Carrying Amount of Goodwill	The following table sets forth the changes in the carrying amount of goodwill by reporting unit for the year ended June 30, 2019: SMP AMS MDS Total Balance at June 30, 2018 $ 119,560 $ 218,147 $ 159,735 $ 497,442 Goodwill adjustment for the Themis acquisition 139 139 Goodwill arising from the Germane acquisition 23,111 23,111 Goodwill arising from the GECO acquisition 21,223 21,223 Goodwill arising from the Syntonic acquisition 4,232 4,232 Goodwill arising from the Athena acquisition 15,999 15,999 Balance at June 30, 2019 $ 140,783 $ 222,379 $ 198,984 $ 562,146

Intangible Assets (Tables)

Intangible Assets (Tables)	12 Months Ended
	Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Acquired Intangible Assets	Intangible assets consisted of the following: Gross Carrying Amount Accumulated Amortization Net Carrying Amount Weighted Average Useful Life June 30, 2019 Customer relationships $ 167,460 $ (38,308 ) $ 129,152 11.4 years Licensing agreements and patents 1,505 (1,022 ) 483 3.5 years Completed technologies 97,592 (22,246 ) 75,346 9.0 years Backlog 1,610 (467 ) 1,143 1.6 years $ 268,167 $ (62,043 ) $ 206,124 June 30, 2018 Customer relationships $ 171,940 $ (46,505 ) $ 125,435 10.7 years Licensing agreements and patents 1,506 (640 ) 866 3.5 years Completed technologies 62,392 (13,101 ) 49,291 8.1 years Backlog 7,650 (5,338 ) 2,312 1.6 years $ 243,488 $ (65,584 ) $ 177,904
Estimated Future Amortization Expense for Acquired Intangible Assets	Estimated future amortization expense for intangible assets remaining at June 30, 2019 is as follows: Fiscal Year Totals 2020 $ 27,606 2021 26,390 2022 26,002 2023 24,020 2024 20,869 Thereafter 81,237 Total future amortization expense $ 206,124
Schedule of Acquired Finite-Lived Intangible Assets by Major Class	The following table summarizes the preliminary estimated fair value of acquired intangible assets arising as a result of the Athena acquisition. These assets are included in the Company's gross and net carrying amounts as of June 30, 2019. Gross Accumulated Net Weighted Completed technologies $ 23,700 $ (358 ) $ 23,342 11.0 years $ 23,700 $ (358 ) $ 23,342 The following table summarizes the preliminary estimated fair value of acquired intangible assets arising as a result of the Syntonic acquisition. These assets are included in the Company's gross and net carrying amounts as of June 30, 2019. Gross Carrying Amount Accumulated Amortization Net Carrying Amount Weighted Average Useful Life Customer relationships $ 4,200 $ (70 ) $ 4,130 10.0 years Completed technologies 2,500 (46 ) 2,454 9.0 years Backlog 400 (67 ) 333 1.0 year $ 7,100 $ (183 ) $ 6,917 The following table summarizes the preliminary estimated fair value of acquired intangible assets arising as a result of the GECO acquisition. These assets are included in the Company's gross and net carrying amounts as of June 30, 2019. Gross Accumulated Net Weighted Customer relationships $ 6,700 $ (254 ) $ 6,446 11.0 years Completed technologies 4,800 (200 ) 4,600 10.0 years Backlog 1,000 (208 ) 792 2.0 years $ 12,500 $ (662 ) $ 11,838 The following table summarizes the preliminary estimated fair value of acquired intangible assets arising as a result of the Germane acquisition. These assets are included in the Company's gross and net carrying amounts as of June 30, 2019. Gross Accumulated Net Weighted Customer relationships $ 8,500 $ (708 ) $ 7,792 11.0 years Completed technologies 4,200 (482 ) 3,718 8.0 years Backlog 210 (193 ) 17 1.0 year $ 12,910 $ (1,383 ) $ 11,527

Restructuring Plan (Tables)

Restructuring Plan (Tables)	12 Months Ended
	Jun. 30, 2019
Restructuring and Related Activities [Abstract]
Expenses by Business Segment for Restructuring Plans	The following table presents the detail of expenses for the Company’s restructuring plans: Severance & Related Facilities & Other Total Restructuring liability at June 30, 2017 $ 1,365 $ — $ 1,365 Restructuring charges 3,181 230 3,411 Cash paid (2,546 ) (177 ) (2,723 ) Reversals (*) (199 ) (53 ) (252 ) Restructuring liability at June 30, 2018 1,801 — 1,801 Restructuring charges 549 80 629 Cash paid (2,333 ) (24 ) (2,357 ) Reversals (*) (13 ) (56 ) (69 ) Restructuring liability at June 30, 2019 $ 4 $ — $ 4 (*) Reversals result from the unused outplacement services and operating costs.

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Components of Income Before Income Taxes and Income Tax Expense (Benefit)	The components of income before income taxes and income tax expense were as follows: Year Ended June 30, 2019 2018 2017 Income before income taxes: United States $ 57,281 $ 43,368 $ 30,499 Foreign 2,246 (795 ) 569 $ 59,527 $ 42,573 $ 31,068 Tax provision (benefit): Federal: Current $ 11,454 $ 4,470 $ 11,476 Deferred (3,008 ) (4,527 ) (7,645 ) 8,446 (57 ) 3,831 State: Current 5,194 2,370 3,650 Deferred (1,421 ) (537 ) (1,684 ) 3,773 1,833 1,966 Foreign: Current 546 186 240 Deferred (13 ) (272 ) 156 533 (86 ) 396 $ 12,752 $ 1,690 $ 6,193
Reconciliation Between Statutory Federal Income Tax Rate and Effective Income Tax Rate from Continuing Operations	The following is the reconciliation between the statutory federal income tax rate and the Company’s effective income tax rate: Year Ended June 30, 2019 2018 2017 Tax provision at federal statutory rates 21.0 % 28.0 % 35.0 % State income tax, net of federal tax benefit 5.9 5.6 4.9 Research and development credits (4.5 ) (5.1 ) (6.1 ) Excess tax benefits on stock compensation (4.5 ) (18.5 ) (13.1 ) Domestic manufacturing deduction — (2.0 ) (3.9 ) Deemed repatriation of foreign earnings — 1.9 (0.1 ) Foreign income tax rate differential 0.1 0.3 0.2 Officer and equity compensation 2.0 1.7 1.8 Acquisition costs 0.1 1.4 0.9 Reserves for tax contingencies 0.3 0.3 (0.6 ) Benefit from tax rate changes — (2.3 ) — Impacts related to acquired tax attributes — (8.7 ) — Other 1.0 1.4 0.9 21.4 % 4.0 % 19.9 %
Components of Net Deferred Tax Assets (Liabilities)	June 30, 2019 2018 Deferred tax assets: Inventory valuation and receivable allowances $ 10,313 $ 8,476 Accrued compensation 4,644 3,803 Equity compensation 4,595 3,944 Federal and state research and development tax credit carryforwards 15,510 18,784 Other accruals 1,128 1,085 Deferred compensation 1,561 1,561 Acquired net operating loss carryforward 721 1,634 Capital loss carryforwards 2,354 2,413 Other temporary differences 2,258 1,565 43,084 43,265 Valuation allowance (16,666 ) (16,992 ) Total deferred tax assets 26,418 26,273 Deferred tax liabilities: Prepaid expenses (848 ) (696 ) Property and equipment (4,927 ) (4,436 ) Intangible assets (38,399 ) (34,546 ) Other temporary differences (58 ) (230 ) Total deferred tax liabilities (44,232 ) (39,908 ) Net deferred tax liabilities $ (17,814 ) $ (13,635 ) As reported: Deferred tax liabilities $ (17,814 ) $ (13,635 ) $ (17,814 ) $ (13,635 )
Summary of Reserves for Unrecognized Income Tax Benefits	The changes in the Company’s reserves for unrecognized income tax benefits are summarized as follows: Year Ended June 30, 2019 2018 Unrecognized tax benefits, beginning of period $ 998 $ 804 Increases for previously recognized positions — — Settlements of previously recognized positions — — Reductions as a result of a lapse of the applicable statute of limitations — (81 ) Increases for currently recognized positions 275 315 Reductions for previously recognized positions — (40 ) Unrecognized tax benefits, end of period $ 1,273 $ 998

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Minimum Lease Payments under Non Cancelable Operating Leases	Minimum lease payments under the Company’s non-cancelable operating leases are as follows: Fiscal Year Totals 2020 $ 10,205 2021 8,949 2022 8,280 2023 7,414 2024 6,496 Thereafter 28,286 Total minimum lease payments $ 69,630

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Jun. 30, 2019
Retirement Benefits [Abstract]
Schedule of Expected Benefit Payments	The following table reflects the total pension benefits expected to be paid from the Plan, which is funded from contributions by participants and the Company. Fiscal Year Total 2020 $ 761 2021 733 2022 883 2023 1,197 2024 1,040 Thereafter (next 5 years) 5,529 Total $ 10,143
Schedule of Net Benefit Costs	The following table outlines the components of net periodic benefit cost of the Plan for the year ended June 30, 2019 and 2018 : Year Ended June 30, 2019 2018 Service cost $ 903 $ 835 Interest cost 156 121 Expected return on assets (183 ) (162 ) Amortization of prior service cost (61 ) 39 Net periodic benefit cost $ 815 $ 833
Schedule of Assumptions Used	The following table reflects the related actuarial assumptions used to determine net periodic benefit cost of the Plan for the year ended June 30, 2019 and 2018 : Year Ended June 30, 2019 2018 Discount rate 0.50 % 0.85 % Expected rate of return on Plan assets 1.50 % 1.50 % Expected inflation 1.20 % 1.20 % Rate of compensation increases 1.50 % 1.20 %
Schedule of Changes in Projected Benefit Obligations	The following table presents the change in projected benefit obligation for the periods presented: Year Ended June 30, 2019 2018 Projected benefit obligation, beginning $ 18,127 $ 17,526 Service cost 903 835 Interest cost 156 121 Employee contributions 3,577 1,931 Actuarial gain 2,859 466 Benefits paid (1,607 ) (1,215 ) Plan amendment — (941 ) Foreign exchange loss (gain) 259 (596 ) Projected benefit obligation at end of year $ 24,274 $ 18,127
Schedule of Changes in Fair Value of Plan Assets	The following table presents the change in Plan assets for the periods presented: Year Ended June 30, 2019 2018 Fair value of Plan assets, beginning $ 12,029 $ 10,925 Actual return on Plan assets 167 167 Company contributions 741 608 Employee contributions 3,577 1,931 Benefits paid (1,607 ) (1,215 ) Foreign exchange gain (loss) 181 (387 ) Fair value of Plan assets at end of year $ 15,088 $ 12,029
Schedule of Net Funded Status	The following table presents the Company's reconciliation of funded status for the period presented: Projected benefit obligation at end of year $ 24,274 $ 18,127 Fair value of plan assets at end of year 15,088 12,029 Funded status $ (9,186 ) $ (6,098 )

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Jun. 30, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Stock Option Plans	The following table summarizes activity of the Company’s stock option plans since June 30, 2017 : Options Outstanding Number of Weighted Average Weighted Average Aggregate Outstanding at June 30, 2017 51 $ 13.53 0.60 Granted — — Exercised (47 ) 14.12 Cancelled — — Outstanding at June 30, 2018 4 $ 5.52 3.13 Granted — — Exercised — — Cancelled — — Outstanding at June 30, 2019 4 $ 5.52 2.13 $ 227 Vested and expected to vest at June 30, 2019 4 $ 5.52 2.13 $ 227 Exercisable at June 30, 2019 4 $ 5.52 2.13 $ 227
Summary of Nonvested Restricted Stock	The following table summarizes the status of the Company’s non-vested restricted stock awards since June 30, 2017 : Non-Vested Restricted Stock Awards Number of Shares Weighted Average Grant Date Fair Value Outstanding at June 30, 2017 1,564 $ 18.93 Granted 521 47.28 Vested (821 ) 46.71 Forfeited (129 ) 31.41 Outstanding at June 30, 2018 1,135 $ 27.26 Granted 468 52.50 Vested (478 ) 51.50 Forfeited (79 ) 36.97 Outstanding at June 30, 2019 1,046 $ 39.62
Stock Based Compensation Expenses	The following table presents share-based compensation expenses from continuing operations included in the Company’s consolidated statement of operations: Year Ended June 30, 2019 2018 2017 Cost of revenues $ 820 $ 502 $ 531 Selling, general and administrative 16,188 14,828 13,212 Research and development 2,414 1,984 1,598 Stock-based compensation expense before tax 19,422 17,314 15,341 Income taxes (5,263 ) (5,713 ) (5,874 ) Stock-based compensation expense, net of income taxes $ 14,159 $ 11,601 $ 9,467

Operating Segment, Geographic_2

Operating Segment, Geographic Information and Significant Customers (Tables)	12 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Geographic Distribution of Revenues and Long Lived Assets from Continuing Operations	The geographic distribution of the Company’s revenues as determined by order origination based on the country in which the Company's legal subsidiary is domiciled is summarized as follows: U.S. Europe Asia Pacific Eliminations Total YEAR ENDED JUNE 30, 2019 Net revenues to unaffiliated customers $ 599,422 $ 49,332 $ 5,990 $ — $ 654,744 Inter-geographic revenues 10,570 1,343 — (11,913 ) — Net revenues $ 609,992 $ 50,675 $ 5,990 $ (11,913 ) $ 654,744 Identifiable long-lived assets (1) $ 54,952 $ 5,037 $ 12 $ — $ 60,001 YEAR ENDED JUNE 30, 2018 Net revenues to unaffiliated customers $ 450,218 $ 35,000 $ 7,966 $ — $ 493,184 Inter-geographic revenues 10,650 925 — (11,575 ) — Net revenues $ 460,868 $ 35,925 $ 7,966 $ (11,575 ) $ 493,184 Identifiable long-lived assets (1) $ 47,997 $ 2,974 $ 9 $ — $ 50,980 YEAR ENDED JUNE 30, 2017 Net revenues to unaffiliated customers $ 380,538 $ 22,242 $ 5,808 $ — $ 408,588 Inter-geographic revenues 7,637 44 — (7,681 ) — Net revenues $ 388,175 $ 22,286 $ 5,808 $ (7,681 ) $ 408,588 Identifiable long-lived assets (1) $ 50,340 $ 1,288 $ 15 $ — $ 51,643 (1) Identifiable long-lived assets exclude goodwill and intangible assets.
Revenue from External Customers by Geographic Areas	The following table presents the Company's net revenue by end market for the periods presented: Year Ended June 30, 2019 2018 2017 Domestic (1) $ 580,935 $ 410,050 $ 341,699 International/Foreign Military Sales (2) 73,809 83,134 66,889 Total Net Revenue $ 654,744 $ 493,184 $ 408,588 (1) Domestic revenues consist of sales where the end user is within the U.S., as well as sales to prime defense contractor customers where the ultimate end user location is not defined. (2) International/Foreign Military Sales consist of sales to U.S. prime defense contractor customers where the end user is outside the U.S., foreign military sales through the U.S. government, and direct sales to non-U.S. based customers intended for end use outside of the U.S.
Revenue from External Customers by Products and Services	The following table presents the Company's net revenue by end application for the periods presented: Year Ended June 30, 2019 2018 2017 Radar (1) $ 164,046 $ 159,737 $ 150,441 Electronic Warfare (2) 128,841 114,801 106,446 Other Sensor and Effector (3) 90,245 48,088 27,719 Total Sensor and Effector 383,132 322,626 284,606 C4I (4) 183,172 87,414 31,679 Other (5) 88,440 83,144 92,303 Total Net Revenues $ 654,744 $ 493,184 $ 408,588 (1) Radar includes end-use applications where radio frequency signals are utilized to detect, track, and identify objects. (2) Electronic Warfare includes end-use applications comprising the offensive and defensive use of the electromagnetic spectrum. (3) Other Sensor and Effector products include all Sensor and Effector end markets other than Radar and Electronic Warfare. (4) C4I includes rugged secure rackmount servers that are designed to drive the most powerful military processing applications. (5) Other products include all component and other sales where the end use is not specified. The following table presents the Company's net revenue by product grouping for the periods presented: Year Ended June 30, 2019 2018 2017 Components (1) $ 184,870 $ 142,982 $ 105,669 Modules and Sub-assemblies (2) 180,873 194,377 161,973 Integrated Subsystems (3) 289,001 155,825 140,946 Total Net Revenues $ 654,744 $ 493,184 $ 408,588
Customers Comprising Ten Percent or more Revenues	Customers comprising 10% or more of the Company’s revenues for the periods shown below are as follows: Year Ended June 30, 2019 2018 2017 Raytheon Company 20 % 19 % 16 % Lockheed Martin Corporation 17 % 19 % 20 % 37 % 38 % 36 %
Schedules of Concentration of Risk, by Risk Factor	.

Supplementary Information (Un_2

Supplementary Information (Unaudited) (Tables)	12 Months Ended
	Jun. 30, 2019
Quarterly Financial Information Disclosure [Abstract]
Consolidated Quarterly Statements of Operations	The following sets forth certain unaudited consolidated quarterly statements of operations data for each of the Company’s last eight quarters. In management’s opinion, this quarterly information reflects all adjustments, consisting only of normal recurring adjustments, necessary for a fair presentation for the periods presented. Such quarterly results are not necessarily indicative of future results of operations and should be read in conjunction with the audited consolidated financial statements of the Company and the notes thereto. 2019 (In thousands, except per share data) 1ST QUARTER 2ND QUARTER 3RD QUARTER 4TH QUARTER Net revenues $ 144,056 $ 159,089 $ 174,636 $ 176,963 Gross margin $ 61,583 $ 70,887 $ 73,847 $ 79,839 Income from operations $ 13,810 $ 19,861 $ 22,062 $ 20,851 Income before income taxes $ 10,608 $ 16,866 $ 19,466 $ 12,587 Income tax provision (benefit) $ 3,129 $ 4,483 $ 5,357 $ (217 ) Net income $ 7,479 $ 12,383 $ 14,109 $ 12,804 Net income per share: Basic net income per share $ 0.16 $ 0.26 $ 0.30 $ 0.26 Diluted net income per share $ 0.16 $ 0.26 $ 0.29 $ 0.25 2018 (In thousands, except per share data) 1ST QUARTER 2ND QUARTER 3RD QUARTER 4TH QUARTER Net revenues $ 106,069 $ 117,912 $ 116,336 $ 152,867 Gross margin $ 50,674 $ 54,160 $ 52,766 $ 68,258 Income from operations $ 10,371 $ 10,888 $ 6,838 $ 18,888 Income before income taxes $ 9,572 $ 10,468 $ 5,905 $ 16,628 Income tax (benefit) provision $ (8,381 ) $ 1,335 $ 2,209 $ 6,527 Net income $ 17,953 $ 9,133 $ 3,696 $ 10,101 Net income per share: Basic net income per share $ 0.39 $ 0.20 $ 0.08 $ 0.22 Diluted net income per share $ 0.38 $ 0.19 $ 0.08 $ 0.21

Description of Business (Detail

Description of Business (Details) $ / shares in Units, $ in Thousands	Apr. 18, 2019USD ($)	Jan. 29, 2019USD ($)	Jul. 31, 2018USD ($)	Jun. 30, 2019USD ($)programcontractor$ / shares	Jun. 30, 2018USD ($)$ / shares	Jun. 30, 2017USD ($)	May 31, 2019$ / shares	May 29, 2019USD ($)
Number of programs using products and services, more than 300 | program				300
Number of contractors using products and services, more than 25 | contractor				25
Common stock, par value (in dollars per share) | $ / shares				$ 0.01	$ 0.01
Equity Securities, FV-NI								$ 6,900
Price of stock sold (in dollars per share) | $ / shares							$ 69
Proceeds from Issuance of Common Stock				$ 454,343	$ 0	$ 215,725
The Athena Group, Inc And Syntonic Microwave LLC
Total purchase price	$ 46,000
GECO Avionics, LLC
Total purchase price		$ 36,500
Germane Systems, LC
Total purchase price			$ 45,000,000

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Cash and Cash Equivalents (Details)	12 Months Ended
	Jun. 30, 2019
Maximum
Restricted Cash and Cash Equivalents Items [Line Items]
Maturity of cash and cash equivalents	90 days

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Restricted Cash (Details) $ in Thousands	Jun. 30, 2016USD ($)
Accounting Policies [Abstract]
Restricted cash	$ 0

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Concentration of Risk (Details) $ in Thousands	12 Months Ended
	Jun. 30, 2019USD ($)customer	Jun. 30, 2018USD ($)customer
Concentration Risk [Line Items]
Cash and cash equivalent | $	$ 257,932	$ 66,521
Customer Concentration Risk | Accounts Receivable, Unbilled Receivables, and Costs in Excess of Billings [Member]
Concentration Risk [Line Items]
Concentration risk, number | customer	5	5
Concentration risk, percent	56.00%	54.00%

Summary of Significant Accoun_7

Summary of Significant Accounting Policies Summary of Significant Accounting Policies - Segment Information (Details) - segment	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Accounting Policies [Abstract]
Number of reportable segments	1	1

Summary of Significant Accoun_8

Summary of Significant Accounting Policies - Intangible Assets (Detail)	12 Months Ended
	Jun. 30, 2019
Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, estimated useful lives	12 years 6 months

Summary of Significant Accoun_9

Summary of Significant Accounting Policies - Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Accounting Policies [Abstract]
Property and equipment, estimated useful lives	3 years
Capitalized software development cost	$ 749	$ 733	$ 508

Summary of Significant Accou_10

Summary of Significant Accounting Policies - Income Taxes (Details)	Jun. 30, 2019
Accounting Policies [Abstract]
Minimum likelihood of tax benefits being recognized upon ultimate settlement	50.00%

Summary of Significant Accou_11

Summary of Significant Accounting Policies - Changes in Product Warranty Accrual (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Product Warranty Liability [Line Items]
Product warranty term	12 months
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Beginning Balance	$ 1,336	$ 1,691	$ 1,523
Accruals for warranties issued during the period	2,274	1,318	1,328
Settlements made during the period	(1,909)	(1,790)	(1,366)
Ending Balance	1,870	1,336	1,691
Germane Systems, LC
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Warranty assumed from CES	169	0	0
Themis
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Warranty assumed from CES	0	117	0
CES Creative Electronic Systems S.A.
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Warranty assumed from CES	0	0	176
Delta
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Warranty assumed from CES	$ 0	$ 0	$ 30

Summary of Significant Accou_12

Summary of Significant Accounting Policies - Basic and Diluted Weighted Average Shares Outstanding (Detail) - shares shares in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Accounting Policies [Abstract]
Basic weighted-average shares outstanding	47,831	46,719	41,986
Effect of dilutive equity instruments	669	752	1,032
Diluted weighted-average shares outstanding	48,500	47,471	43,018

Summary of Significant Accou_13

Summary of Significant Accounting Policies - Net Earnings Per Share Additional Information (Details) - shares shares in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Accounting Policies [Abstract]
Common stock excluded from diluted earning per share (in shares)	32	329	16

Summary of Significant Accou_14

Summary of Significant Accounting Policies - Accumulated Other Comprehensive Income (Details) - USD ($)	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Operating Leases, Future Minimum Payments Due	$ 69,630,000
Accumulated other comprehensive income adjustment for foreign currency	(232,000)	$ (137,000)	$ (93,000)
Accumulated other comprehensive income adjustment for pension plans	(2,350,000)	$ 354,000	$ 220,000
Accumulated other comprehensive income, available-for-sale securities gains (losses)	$ 0			$ 0

Summary of Significant Accou_15

Summary of Significant Accounting Policies Revenue Recognition (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Deferred Revenue Arrangement [Line Items]
Percentage of revenue recognized	61.00%
Unbilled receivables and cost in excess of billings	$ 57,387	$ 39,774
Contract with customer, liability	12,362	$ 13,425
Contract with customer, liability, revenue recognized	10,513
Revenue, remaining performance obligation, amount	$ 186,066
Contract Accounting
Deferred Revenue Arrangement [Line Items]
Percentage of revenue recognized	77.00%	79.00%	77.00%
Transferred over Time
Deferred Revenue Arrangement [Line Items]
Percentage of revenue recognized	23.00%	21.00%	23.00%
Minimum
Deferred Revenue Arrangement [Line Items]
Product warranty period	12 years
Extended product warranty, period	12 months
Maximum
Deferred Revenue Arrangement [Line Items]
Product warranty period	36 months
Extended product warranty, period	36 months

Acquisitions - Narrative (Detai

Acquisitions - Narrative (Details) - USD ($)	Apr. 19, 2019	Apr. 18, 2019	Jan. 29, 2019	Jul. 31, 2018	Jul. 13, 2018	Feb. 01, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Business Acquisition [Line Items]
Goodwill							$ 562,146,000	$ 497,442,000
Acquisition of businesses, net of cash acquired			$ 36,500,000				$ 127,083,000	$ 185,396,000	$ 77,757,000
Customer Relationships
Business Acquisition [Line Items]
Acquired intangible assets, estimated useful lives							11 years 4 months 24 days	10 years 8 months 12 days
The Athena Group, Inc
Business Acquisition [Line Items]
Total purchase price		$ 34,000,000
Fair value of identifiable intangible assets		23,700,000
Goodwill		15,999,000
Revenue from acquiree since acquisition date							$ 1,071
Earnings (loss) of acquiree since acquisition date							93
Acquisition of businesses, net of cash acquired	$ 33,554,000	33,554,000
Working capital and net debt adjustment		446,000
The Athena Group, Inc | Developed Technology
Business Acquisition [Line Items]
Fair value of identifiable intangible assets		$ 23,700,000,000
Acquired intangible assets, estimated useful lives		11 years
Syntonic Microwave LLC
Business Acquisition [Line Items]
Fair value of identifiable intangible assets		$ 7,100,000
Acquired intangible assets, estimated useful lives		15 years
Goodwill		$ 4,232,000
Revenue from acquiree since acquisition date							993
Earnings (loss) of acquiree since acquisition date							133
Goodwill acquired, tax deductible amount							3,092
Acquisition of businesses, net of cash acquired		12,000,000
Syntonic Microwave LLC | Customer Relationships
Business Acquisition [Line Items]
Fair value of identifiable intangible assets		$ 4,200,000,000
Acquired intangible assets, estimated useful lives		10 years
Syntonic Microwave LLC | Developed Technology
Business Acquisition [Line Items]
Fair value of identifiable intangible assets		$ 2,500,000,000
Acquired intangible assets, estimated useful lives		9 years
Syntonic Microwave LLC | Order or Production Backlog
Business Acquisition [Line Items]
Fair value of identifiable intangible assets		$ 400,000,000
Acquired intangible assets, estimated useful lives		1 year
GECO Avionics, LLC
Business Acquisition [Line Items]
Total purchase price			36,500,000
Fair value of identifiable intangible assets			$ 12,500,000
Acquired intangible assets, estimated useful lives			15 years
Goodwill			$ 21,223,000
Revenue from acquiree since acquisition date							6,834
Earnings (loss) of acquiree since acquisition date							(112)
Goodwill acquired, tax deductible amount							20,984,000
Acquisition of businesses, net of cash acquired			36,500,000
GECO Avionics, LLC | Customer Relationships
Business Acquisition [Line Items]
Fair value of identifiable intangible assets			$ 6,700,000,000
Acquired intangible assets, estimated useful lives			11 years
GECO Avionics, LLC | Developed Technology
Business Acquisition [Line Items]
Fair value of identifiable intangible assets			$ 4,800,000,000
Acquired intangible assets, estimated useful lives			10 years
GECO Avionics, LLC | Order or Production Backlog
Business Acquisition [Line Items]
Fair value of identifiable intangible assets			$ 1,000,000,000
Acquired intangible assets, estimated useful lives			2 years
Germane Systems, LC
Business Acquisition [Line Items]
Total purchase price				$ 45,000,000,000
Fair value of identifiable intangible assets				$ 12,910,000
Acquired intangible assets, estimated useful lives				15 years
Goodwill				$ 23,111,000
Revenue from acquiree since acquisition date							46,767
Earnings (loss) of acquiree since acquisition date							3,132
Goodwill acquired, tax deductible amount							$ 22,102,000
Acquisition of businesses, net of cash acquired				45,729,000
Working capital and net debt adjustment				1,244,000
Germane Systems, LC | Customer Relationships
Business Acquisition [Line Items]
Fair value of identifiable intangible assets				$ 8,500,000,000
Acquired intangible assets, estimated useful lives				11 years
Germane Systems, LC | Developed Technology
Business Acquisition [Line Items]
Fair value of identifiable intangible assets				$ 4,200,000,000
Acquired intangible assets, estimated useful lives				8 years
Germane Systems, LC | Order or Production Backlog
Business Acquisition [Line Items]
Fair value of identifiable intangible assets				$ 210,000,000
Acquired intangible assets, estimated useful lives				1 year
Themis Computer Acquisition
Business Acquisition [Line Items]
Total purchase price						$ 180,000,000
Fair value of identifiable intangible assets						71,720,000
Goodwill						112,987,000
Acquisition of businesses, net of cash acquired						179,005,000
Working capital and net debt adjustment						1,274,000
Post closing adjustments					$ 700,000
Themis Computer Acquisition | Customer Relationships
Business Acquisition [Line Items]
Fair value of identifiable intangible assets						$ 52,600,000
Acquired intangible assets, estimated useful lives						12 years 6 months
Themis Computer Acquisition | Developed Technology
Business Acquisition [Line Items]
Fair value of identifiable intangible assets						$ 17,150,000
Acquired intangible assets, estimated useful lives						9 years 6 months
Themis Computer Acquisition | Order or Production Backlog
Business Acquisition [Line Items]
Fair value of identifiable intangible assets						$ 1,970,000
Acquired intangible assets, estimated useful lives						1 year

Acquisitions - Schedule of Busi

Acquisitions - Schedule of Business Acquisitions (Details) - USD ($) $ in Thousands	Apr. 19, 2019	Apr. 18, 2019	Jan. 29, 2019	Jul. 31, 2018	Feb. 01, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Consideration transferred
Net purchase price			$ 36,500			$ 127,083	$ 185,396	$ 77,757
Fair value of tangible assets acquired and liabilities assumed
Goodwill						$ 562,146	$ 497,442
GECO Avionics, LLC
Business Acquisition [Line Items]
Acquired intangible assets, estimated useful lives			15 years
Consideration transferred
Cash paid at closing			$ 36,500
Net purchase price			36,500
Fair value of tangible assets acquired and liabilities assumed
Accounts receivable			1,320
Inventory			1,454
Fixed assets			459
Accounts payable			(217)
Accrued expenses			(239)
Fair value of net tangible assets acquired			2,777
Fair value of identifiable intangible assets			12,500
Goodwill			21,223
Fair value of assets acquired			$ 36,500
The Athena Group, Inc
Consideration transferred
Cash paid at closing		$ 34,049
Working capital and net debt adjustment		(446)
Less cash acquired	$ (49)	(49)
Net purchase price	$ 33,554	33,554
Fair value of tangible assets acquired and liabilities assumed
Cash		49
Accounts receivable		726
Fixed assets		74
Other current and non-current assets		260
Accounts payable		(48)
Accrued expenses		(143)
Other current and non-current liabilities		(600)
Deferred tax liability		(6,414)
Fair value of net tangible assets acquired		(6,096)
Fair value of identifiable intangible assets		23,700
Goodwill		15,999
Fair value of assets acquired		$ 33,603
Syntonic Microwave LLC
Business Acquisition [Line Items]
Acquired intangible assets, estimated useful lives		15 years
Consideration transferred
Cash paid at closing		$ 13,118
Less cash acquired		(1,118)
Net purchase price		12,000
Fair value of tangible assets acquired and liabilities assumed
Cash		1,118
Accounts receivable		281
Inventory		482
Fixed assets		31
Other current and non-current assets		6
Accounts payable		(71)
Accrued expenses		(61)
Fair value of net tangible assets acquired		1,786
Fair value of identifiable intangible assets		7,100
Goodwill		4,232
Fair value of assets acquired		$ 13,118
Germane Systems, LC
Business Acquisition [Line Items]
Acquired intangible assets, estimated useful lives				15 years
Consideration transferred
Cash paid at closing				$ 47,166
Working capital and net debt adjustment				(1,244)
Less cash acquired				(193)
Net purchase price				45,729
Fair value of tangible assets acquired and liabilities assumed
Cash				193
Accounts receivable				4,277
Inventory				8,575
Fixed assets				867
Other current and non-current assets				596
Accounts payable				(3,146)
Accrued expenses				(1,229)
Other current and non-current liabilities				(232)
Fair value of net tangible assets acquired				9,901
Fair value of identifiable intangible assets				12,910
Goodwill				23,111
Fair value of assets acquired				$ 45,922
Themis Computer Acquisition
Consideration transferred
Cash paid at closing					$ 187,089
Working capital and net debt adjustment					(1,274)
Less cash acquired					(6,810)
Net purchase price					179,005
Fair value of tangible assets acquired and liabilities assumed
Cash					6,810
Accounts receivable					7,713
Inventory					7,333
Fixed assets					479
Other current and non-current assets					2,896
Accounts payable					(3,287)
Accrued expenses					(5,319)
Other current and non-current liabilities					(1,210)
Deferred tax liability					(14,307)
Fair value of net tangible assets acquired					1,108
Fair value of identifiable intangible assets					71,720
Goodwill					112,987
Fair value of assets acquired					$ 185,815

Fair Value of Financial Instr_3

Fair Value of Financial Instruments - Summary of Financial Assets Measured at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
Fair Value
Assets:
Fair value measurement disclosure	$ 31,522	$ 1,056
Certificates of Deposit [Member] | Fair Value
Assets:
Fair value measurement disclosure	31,522	1,056
Level 1
Assets:
Fair value measurement disclosure	0	0
Level 1 | Certificates of Deposit [Member]
Assets:
Fair value measurement disclosure	0	0
Level 2
Assets:
Fair value measurement disclosure	31,522	1,056
Level 2 | Certificates of Deposit [Member]
Assets:
Fair value measurement disclosure	31,522	1,056
Level 3
Assets:
Fair value measurement disclosure	0	0
Level 3 | Certificates of Deposit [Member]
Assets:
Fair value measurement disclosure	$ 0	$ 0

Inventory (Detail)

Inventory (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
Inventory Disclosure [Abstract]
Raw materials	$ 84,561	$ 61,748
Work in process	38,525	30,841
Finished goods	14,026	15,996
Total	$ 137,112	$ 108,585

Inventory - Additional Informat

Inventory - Additional Information (Details) $ in Thousands	12 Months Ended
	Jun. 30, 2019USD ($)
Inventory Disclosure [Abstract]
Increase in inventory	$ 28,527

Property and Equipment (Detail)

Property and Equipment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives	3 years
Property and equipment, gross	$ 172,963	$ 145,697
Less: accumulated depreciation and amortization	(112,962)	(94,717)
Property and equipment, net	60,001	50,980
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 78,195	71,799
Computer equipment and software | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives	3 years
Computer equipment and software | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives	4 years
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives	5 years
Property and equipment, gross	$ 5,330	4,927
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	25,646	21,552
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 63,792	$ 47,419
Machinery and equipment | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives	5 years
Machinery and equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives	10 years

Property and Equipment - Additi

Property and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Property, Plant and Equipment [Line Items]
Increase in property and equipment	$ 9,021
Depreciation and amortization expense related to property and equipment	18,478	$ 16,273	$ 12,589
Computer equipment and software
Property, Plant and Equipment [Line Items]
Retirement of asset	$ 3,980	$ 611

Goodwill Goodwill - Changes in

Goodwill Goodwill - Changes in Carrying Amount of Goodwill (Detail) $ in Thousands	12 Months Ended
	Jun. 30, 2019USD ($)
Goodwill [Roll Forward]
Beginning Balance	$ 497,442
Ending Balance	562,146
Sensor And Mission Processing [Member]
Goodwill [Roll Forward]
Beginning Balance	119,560
Ending Balance	140,783
AMS [Member]
Goodwill [Roll Forward]
Beginning Balance	218,147
Ending Balance	222,379
MDS
Goodwill [Roll Forward]
Beginning Balance	159,735
Ending Balance	198,984
RTL
Goodwill [Roll Forward]
Goodwill arising from acquisition	4,232
RTL | AMS [Member]
Goodwill [Roll Forward]
Goodwill arising from acquisition	4,232
Themis
Goodwill [Roll Forward]
Goodwill adjustments	139
Themis | MDS
Goodwill [Roll Forward]
Goodwill adjustments	139
The Athena Group, Inc [Member]
Goodwill [Roll Forward]
Goodwill arising from acquisition	15,999
The Athena Group, Inc [Member] | MDS
Goodwill [Roll Forward]
Goodwill arising from acquisition	$ 15,999

Intangible Assets (Detail)

Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 268,167	$ 243,488
Accumulated Amortization	(62,043)	(65,584)
Net Carrying Amount	206,124	177,904
Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	167,460	171,940
Accumulated Amortization	(38,308)	(46,505)
Net Carrying Amount	$ 129,152	$ 125,435
Acquired intangible assets, estimated useful lives	11 years 4 months 24 days	10 years 8 months 12 days
Licensing agreements and patents
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,505	$ 1,506
Accumulated Amortization	(1,022)	(640)
Net Carrying Amount	$ 483	$ 866
Acquired intangible assets, estimated useful lives	3 years 6 months	3 years 6 months
Completed technologies
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 97,592	$ 62,392
Accumulated Amortization	(22,246)	(13,101)
Net Carrying Amount	$ 75,346	$ 49,291
Acquired intangible assets, estimated useful lives	9 years	8 years 1 month 6 days
Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,610	$ 7,650
Accumulated Amortization	(467)	(5,338)
Net Carrying Amount	$ 1,143	$ 2,312
Acquired intangible assets, estimated useful lives	1 year 7 months 6 days	1 year 7 months 6 days

Intangible Assets - Estimated F

Intangible Assets - Estimated Future Amortization Expense for Acquired Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Finite-Lived Intangible Assets, Gross	$ 268,167	$ 243,488
Finite-Lived Intangible Assets, Accumulated Amortization	62,043	65,584
2015	27,606
2016	26,390
2017	26,002
2018	24,020
2019	20,869
Thereafter	81,237
Net Carrying Amount	206,124	177,904
Customer Relationships
Finite-Lived Intangible Assets, Gross	167,460	171,940
Finite-Lived Intangible Assets, Accumulated Amortization	38,308	46,505
Net Carrying Amount	$ 129,152	$ 125,435
Acquired intangible assets, estimated useful lives	11 years 4 months 24 days	10 years 8 months 12 days
Completed Technology [Member]
Finite-Lived Intangible Assets, Gross	$ 97,592	$ 62,392
Finite-Lived Intangible Assets, Accumulated Amortization	22,246	13,101
Net Carrying Amount	$ 75,346	$ 49,291
Acquired intangible assets, estimated useful lives	9 years	8 years 1 month 6 days
Backlog [Member]
Finite-Lived Intangible Assets, Gross	$ 1,610	$ 7,650
Finite-Lived Intangible Assets, Accumulated Amortization	467	5,338
Net Carrying Amount	$ 1,143	$ 2,312
Acquired intangible assets, estimated useful lives	1 year 7 months 6 days	1 year 7 months 6 days

Restructuring Plan - Additional

Restructuring Plan - Additional Information (Detail) $ in Thousands	12 Months Ended
	Jun. 30, 2019USD ($)position	Jun. 30, 2018USD ($)	Jun. 30, 2017USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	$ 560	$ 3,159	$ 1,952
Number of positions eliminated | position	38
Other restructuring costs		$ 3,159	1,042
2014 Plan Member]
Restructuring Cost and Reserve [Line Items]
Severance costs			$ 910

Restructuring Plan - Expenses b

Restructuring Plan - Expenses by Business Segment for Restructuring Plans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Restructuring Reserve [Roll Forward]
Restructuring liability at beginning of period	$ 1,801	$ 1,365
Provisions	629	3,411
Cash paid	2,357	(2,723)
Reversals	(69)	(252)
Restructuring liability at end period	4	1,801
Severance
Restructuring Reserve [Roll Forward]
Restructuring liability at beginning of period	1,801	1,365
Provisions	549	3,181
Cash paid	2,333	(2,546)
Reversals	(13)	(199)
Restructuring liability at end period	4	1,801
Other Members
Restructuring Reserve [Roll Forward]
Restructuring liability at beginning of period	0	0
Provisions	80	230
Cash paid	24	(177)
Reversals	(56)	(53)
Restructuring liability at end period	$ 0	$ 0

Income Taxes - Components of In

Income Taxes - Components of Income Before Income Taxes and Income Tax Expense (Benefit) (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Income before income taxes:
United States									$ 57,281	$ 43,368	$ 30,499
Foreign									2,246	(795)	569
Income before income taxes	$ 12,587	$ 19,466	$ 16,866	$ 10,608	$ 16,628	$ 5,905	$ 10,468	$ 9,572	59,527	42,573	31,068
Federal:
Current									11,454	4,470	11,476
Deferred									(3,008)	(4,527)	(7,645)
Federal Income Tax Expense (Benefit), Continuing Operations, Total									8,446	(57)	3,831
State:
Current									5,194	2,370	3,650
Deferred									(1,421)	(537)	(1,684)
State and Local Income Tax Expense (Benefit), Continuing Operations, Total									3,773	1,833	1,966
Foreign:
Current									546	186	240
Deferred									(13)	(272)	156
Foreign, Income Tax expense benefit									533	(86)	396
Income tax expense (benefit)	$ (217)	$ 5,357	$ 4,483	$ 3,129	$ 6,527	$ 2,209	$ 1,335	$ (8,381)	$ 12,752	$ 1,690	$ 6,193

Income Taxes - Reconciliation B

Income Taxes - Reconciliation Between Statutory Federal Income Tax Rate and Effective Income Tax Rate from Continuing Operations (Detail)	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Income Tax Disclosure [Abstract]
Income taxes at federal statutory rates	21.00%	28.00%	35.00%
State income tax, net of federal tax benefit	5.90%	5.60%	4.90%
Research and development credits	(4.50%)	(5.10%)	(6.10%)
Excess tax benefits on stock compensation	(4.50%)	(18.50%)	(13.10%)
Domestic manufacturing deduction	0.00%	(2.00%)	(3.90%)
Deemed repatriation of foreign earnings	0.00%	(1.90%)	0.10%
Foreign tax credits	(0.10%)	(0.30%)	(0.20%)
Equity compensation	2.00%	1.70%	1.80%
Change in the fair value of the liability related to the LNX earn-out	0.30%	0.30%	(0.60%)
Effective Income Tax Rate Reconciliation, Acquired Tax Attributes	0.00%	(8.70%)	0.00%
Benefit from tax rate changes	0.00%	(2.30%)	0.00%
Acquisition costs	0.10%	1.40%	0.90%
Other	1.00%	1.40%	0.90%
Effective income tax rate from continuing operation	21.40%	4.00%	19.90%

Income Taxes - Components of Ne

Income Taxes - Components of Net Deferred Tax Assets (Liabilities) (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
Deferred tax assets:
Inventory valuation and receivable allowances	$ 10,313	$ 8,476
Accrued compensation	4,644	3,803
Equity compensation	4,595	3,944
Federal and state research and development tax credit carryforwards	15,510	18,784
Other accruals	1,128	1,085
Accrued compensation	1,561	1,561
Operating Loss Carryforwards	721	1,634
Capital loss carryforwards	2,354	2,413
Other temporary differences	2,258	1,565
Deferred tax Asset	43,084	43,265
Valuation allowance	(16,666)	(16,992)
Total deferred tax assets	26,418	26,273
Deferred tax liabilities:
Deferred revenue	(848)	(696)
Property and equipment depreciation	(4,927)	(4,436)
Acquired intangible assets	(38,399)	(34,546)
Other temporary differences	(58)	(230)
Total deferred tax liabilities	44,232	39,908
Net deferred tax (liabilities) assets	(17,814)	(13,635)
Non-current deferred tax assets	$ (17,814)	$ (13,635)

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Tax Credit Carryforward [Line Items]
Reductions as a result of a lapse of the applicable statute of limitations	$ 0	$ 81
Settlements of previously recognized positions	0	0
Excess Tax Benefit from Share-based Compensation, Operating Activities	2,672	$ 7,897
Domestic Tax Authority | Research and development credit carryforwards
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	$ 345
Domestic Tax Authority | Research and development credit carryforwards | Maximum
Tax Credit Carryforward [Line Items]
Tax carryforward expiration year	2029
State and Local Jurisdiction | Research and development credit carryforwards
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	$ 15,165

Income Taxes - Summary of Reser

Income Taxes - Summary of Reserves for Unrecognized Income Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits, beginning of period	$ 998	$ 804
Increases for previously recognized positions	0	0
Settlements of previously recognized positions	0	0
Reductions as a result of a lapse of the applicable statute of limitations	0	(81)
Increases for currently recognized positions	275	315
Reductions for previously recognized positions	0	(40)
Unrecognized tax benefits, end of period	1,273	998	$ 804
Unrecognized tax benefits that would impact effective tax rate	1,273
Interest and penalties accrued	84
interest and penalties recognized	$ 101	$ 42	$ 30

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Long-term Purchase Commitment [Line Items]
Rental expenses	$ 8,710	$ 6,534	$ 7,774
Non-cancelable purchase commitments
Long-term Purchase Commitment [Line Items]
Purchase commitments for less than one year	$ 73,762

Commitments and Contingencies_2

Commitments and Contingencies - Minimum Lease Payments under Non Cancelable Operating Leases (Detail) $ in Thousands	Jun. 30, 2019USD ($)
Commitments and Contingencies Disclosure [Abstract]
2015	$ 10,205
2016	8,949
2017	8,280
2018	7,414
2019	6,496
Thereafter	28,286
Total minimum lease payments	$ 69,630

Debt - Additional Information (

Debt - Additional Information (Detail) - USD ($)	May 02, 2016	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017	Jun. 27, 2017
Line of Credit Facility [Line Items]
Interest Expense		$ 9,109,000	$ 2,850,000	$ 7,568,000
Letters of credit outstanding		$ 1,737,000
Debt instrument borrowing term	5 years
Collateral Capital Stock		65.00%
Revolver
Line of Credit Facility [Line Items]
Interest Expense		$ 9,109,000	$ 2,850
Term Loan [Member] | Credit Agreement [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 200,000,000
Revolver [Member] | Credit Agreement [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 100,000,000
Basis Spread on Variable Rate		1.50%
Commitment Fee Percentage		0.25%
Revolver [Member] | Amended Credit Agreement [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity					$ 400,000,000

Employee Benefit Plans - Pensio

Employee Benefit Plans - Pension, Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Net gain in accumulated other comprehensive income	$ (2,350)	$ 354	$ 220
Company contributions	741
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	(2,859)	(466)
Funded status of plan	9,186	6,098
Net gain in accumulated other comprehensive income		354
Company contributions	741	608
Fair value of plan assets	$ 15,088	$ 12,029	$ 10,925
Discount rate	0.50%	0.85%
Rate of compensation increases	1.50%	1.20%
Maximum
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay		3.00%	3.00%

- Schedule of Expected Future P

- Schedule of Expected Future Pension Benefits (Details) - Foreign Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 815	$ 833
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2018	761
2019	733
2020	883
2021	1,197
2022	1,040
Thereafter (next 5 years)	5,529
Total	$ 10,143

Employee Benefit Plans - Schedu

Employee Benefit Plans - Schedule of Net Periodic Benefit Cost (Details) - Foreign Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 903	$ 835
Interest cost	156	121
Expected return on assets	(183)	(162)
Amortization of prior service cost	(61)	39
Net periodic benefit cost	$ 815	$ 833

Employee Benefit Plans - Sche_2

Employee Benefit Plans - Schedule of Related Actuarial Assumptions (Details) - Foreign Plan [Member]	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Defined Benefit Plan Disclosure [Line Items]
Discount rate	0.50%	0.85%
Expected rate of return on Plan assets	1.50%	1.50%
Expected inflation	1.20%	1.20%
Rate of compensation increases	1.50%	1.20%

Employee Benefit Plans - Sche_3

Employee Benefit Plans - Schedule of Projected Benefit Obligation (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss)	$ 259	$ (596)
Foreign Plan [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, beginning	18,127	17,526
Service cost	903	835
Interest cost	156	121
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant	3,577	1,931
Actuarial gain	2,859	466
Defined Benefit Plan, Benefit Obligation, Benefits Paid	1,607	1,215
Plan amendment	0	(941)
Projected benefit obligation at end of year	$ 24,274	$ 18,127

Employee Benefit Plans - Sche_4

Employee Benefit Plans - Schedule of Change in Plan Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Company contributions	$ 741
Foreign Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of Plan assets, beginning	12,029	$ 10,925
Actual return on Plan assets	167	167
Company contributions	741	608
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant	3,577	1,931
Defined Benefit Plan, Benefit Obligation, Benefits Paid	1,607	1,215
Foreign exchange gain (loss)	181	(387)
Fair value of Plan assets at end of year	$ 15,088	$ 12,029

Employee Benefit Plans - Reconc

Employee Benefit Plans - Reconciliation of Funded Status (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	$ 2,350	$ (354)	$ (220)
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	0.50%	0.85%
Projected benefit obligation at end of year	$ 24,274	$ 18,127	17,526
Fair value of plan assets at end of year	15,088	12,029	$ 10,925
Funded status	$ (9,186)	$ (6,098)
Rate of compensation increases	1.50%	1.20%

- 401(k) Plan (Details)

- 401(k) Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Defined Contribution Plan Disclosure [Line Items]
Employer contributions	$ 4,525	$ 3,684	$ 3,206
Maximum
Defined Contribution Plan Disclosure [Line Items]
Employee Contribution of eligible compensation		3.00%	3.00%
401(k) Plan | Maximum
Defined Contribution Plan Disclosure [Line Items]
Employee Contribution of eligible compensation	3.00%

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	May 23, 2019	May 20, 2019	Aug. 28, 2017	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017	May 31, 2019	May 29, 2019
Class of Stock [Line Items]
Preferred stock shares authorized to issue (in shares)				1,000,000	1,000,000
Preferred stock shares par value (in dollars per share)				$ 0.01	$ 0.01
Shares sold (in shares)			200,000
Common stock, par value (in dollars per share)				$ 0.01	$ 0.01
Equity Securities, FV-NI								$ 6,900
Price of stock sold (in dollars per share)							$ 69
Proceeds from Issuance of Common Stock				$ 454,343	$ 0	$ 215,725
Public Stock Offering
Class of Stock [Line Items]
Shares sold (in shares)	6,000,000	5,000,000
Common stock, par value (in dollars per share)		$ 0.01
Over-Allotment Option
Class of Stock [Line Items]
Shares sold (in shares)	900,000	750,000

Stock Based Compensation - Addi

Stock Based Compensation - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2015	Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 241	$ 317
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share options granted	0	0	0	0
Intrinsic value of the options exercised		$ 1,780	$ 3,762
Unrecognized compensation cost related to non-vested options granted					$ 0
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation, period of recognition	2 years 6 months	2 years 3 months 18 days
Restricted stock granted	468,000	521,000
Total fair value of restricted stock awards vested	$ 24,596	$ 38,344	$ 19,402
Unrecognized compensation cost related to non-vested restricted stock	$ 32,886	$ 24,740
1997 Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for issuance under stock incentive plan	1,800,000
Shares available for future grant	118,000
Purchase price as a percentage of the lesser of the market value of such shares at either the beginning or the end of each nine-month offering period	85.00%
Percentage of employee compensation that may be uses to purchase common stock through payroll deductions, maximum	10.00%
Number of share options granted	102,000	82,000	96,000

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of Stock Option Plans (Detail) - Stock Options - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2015
Number of Shares
Outstanding at beginning of period	4,000	51,000
Granted	0	0	0	0
Exercised		(47,000)
Cancelled		0
Outstanding at end of period	4,000	4,000	51,000
Vested and expected to vest at end of period	4,000
Exercisable at end of period	4,000
Weighted Average Exercise Price (in dollars per share)
Outstanding at beginning of period	$ 5.52	$ 13.53
Granted		0
Exercised		14.12
Cancelled		0
Outstanding at end of period	5.52	$ 5.52	$ 13.53
Vested and expected to vest at end of period	5.52
Exercisable at end of period	$ 5.52
Weighted Average Remaining Contractual Term (Years)
Outstanding at end of period	2 years 1 month 17 days	3 years 1 month 17 days	18 days
Vested and expected to vest at end of period	2 years 1 month 17 days
Exercisable at end of period	2 years 1 month 17 days
Aggregate Intrinsic Value
Outstanding at end of period	$ 227
Vested and expected to vest at end of period	227
Exercisable at end of period	$ 227

Stock-Based Compensation - Su_2

Stock-Based Compensation - Summary of Nonvested Restricted Stock (Detail) - Restricted Stock - $ / shares shares in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Number of Shares
Beginning Balance	1,135	1,564
Granted	468	521
Vested	(478)	(821)
Forfeited	(79)	(129)
Ending Balance	1,046	1,135
Weighted Average Grant Date Fair Value (in dollars per share)
Beginning Balance	$ 27.26	$ 18.93
Granted	52.50	47.28
Vested	51.50	46.71
Forfeited	36.97	31.41
Ending Balance	$ 39.62	$ 27.26

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock Based Compensation Expenses (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 241	$ 317
Stock-based compensation expense	19,422	17,314	$ 15,341
Income taxes	(5,263)	(5,713)	(5,874)
Share-based compensation expense, net of income taxes	14,159	11,601	9,467
Cost of revenues
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	820	502	531
Selling, general and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	16,188	14,828	13,212
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 2,414	$ 1,984	$ 1,598

Operating Segment, Geographic_3

Operating Segment, Geographic Information and Significant Customers - Additional Information (Details) - segment	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting [Abstract]
Number of operating segments	1
Number of reportable segments	1	1

Operating Segment, Geographic_4

Operating Segment, Geographic Information and Significant Customers - Geographic Distribution of Revenues and Long Lived Assets from Continuing Operations (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues to unaffiliated customers									$ 654,744	$ 493,184	$ 408,588
Inter-geographic revenues									0	0	0
Net revenues	$ 176,963	$ 174,636	$ 159,089	$ 144,056	$ 152,867	$ 116,336	$ 117,912	$ 106,069	654,744	493,184	408,588
Identifiable long-lived assets	50,980				51,643				60,001	50,980	51,643
US
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues									580,935	410,050	341,699
Reportable Geographical Components | US
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues to unaffiliated customers									599,422	450,218	380,538
Inter-geographic revenues									10,570	10,650	7,637
Net revenues									609,992	460,868	388,175
Identifiable long-lived assets	47,997				50,340				54,952	47,997	50,340
Reportable Geographical Components | Europe
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues to unaffiliated customers									49,332	35,000	22,242
Inter-geographic revenues									1,343	925	44
Net revenues									50,675	35,925	22,286
Identifiable long-lived assets	2,974				1,288				5,037	2,974	1,288
Reportable Geographical Components | Asia Pacific
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues to unaffiliated customers									5,990	7,966	5,808
Inter-geographic revenues									0	0	0
Net revenues									5,990	7,966	5,808
Identifiable long-lived assets	9				15				12	9	15
Geography Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues to unaffiliated customers									0	0	0
Inter-geographic revenues									(11,913)	(11,575)	(7,681)
Net revenues									(11,913)	(11,575)	(7,681)
Identifiable long-lived assets	$ 0				$ 0				$ 0	$ 0	$ 0

Operating Segment, Geographic_5

Operating Segment, Geographic Information and Significant Customers - Net Revenue by End Market (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	$ 176,963	$ 174,636	$ 159,089	$ 144,056	$ 152,867	$ 116,336	$ 117,912	$ 106,069	$ 654,744	$ 493,184	$ 408,588
Domestic
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues									580,935	410,050	341,699
International/Foreign Military Sales
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues									$ 73,809	$ 83,134	$ 66,889

Operating Segment, Geographic_6

Operating Segment, Geographic Information and Significant Customers - Net Revenue by End Application (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Revenue from External Customer [Line Items]
Net revenues	$ 176,963	$ 174,636	$ 159,089	$ 144,056	$ 152,867	$ 116,336	$ 117,912	$ 106,069	$ 654,744	$ 493,184	$ 408,588
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss)									259	(596)
Radar End User Applications
Revenue from External Customer [Line Items]
Net revenues									164,046	159,737	150,441
Electronic Warfare End User Applications
Revenue from External Customer [Line Items]
Net revenues									128,841	114,801	106,446
Other Sensor And Effector Applications [Member]
Revenue from External Customer [Line Items]
Net revenues									90,245	48,088	27,719
Total Sensor And Effector Applications [Member]
Revenue from External Customer [Line Items]
Net revenues									383,132	322,626	284,606
C4I Applications [Member]
Revenue from External Customer [Line Items]
Net revenues									183,172	87,414	31,679
Other End User Applications
Revenue from External Customer [Line Items]
Net revenues									$ 88,440	$ 83,144	$ 92,303

Operating Segment, Geographic_7

Operating Segment, Geographic Information and Significant Customers - Net Revenue by Product Grouping (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Revenue from External Customer [Line Items]
Net revenues	$ 176,963	$ 174,636	$ 159,089	$ 144,056	$ 152,867	$ 116,336	$ 117,912	$ 106,069	$ 654,744	$ 493,184	$ 408,588
Components
Revenue from External Customer [Line Items]
Net revenues									184,870	142,982	105,669
Modules and Sub-assemblies
Revenue from External Customer [Line Items]
Net revenues									180,873	194,377	161,973
Integrated Subsystems
Revenue from External Customer [Line Items]
Net revenues									$ 289,001	$ 155,825	$ 140,946

Operating Segment, Geographic_8

Operating Segment, Geographic Information and Significant Customers - Customers Comprising Ten Percent or More of Revenues (Detail) - Customer Concentration Risk - Revenues	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Revenue, Major Customer [Line Items]
Concentration risk, percent	37.00%	38.00%	36.00%
Raytheon Company
Revenue, Major Customer [Line Items]
Concentration risk, percent	17.00%	19.00%	20.00%
Lockheed Martin Corporation
Revenue, Major Customer [Line Items]
Concentration risk, percent	20.00%	19.00%	16.00%

Derivatives (Details)

Derivatives (Details) - Designated as Hedging Instrument - Interest Rate Swap - USD ($)	3 Months Ended
	Jun. 30, 2019	Jan. 11, 2019
Derivative [Line Items]
Derivative, notional amount		$ 175,000,000
Derivative, fixed interest rate		2.54%
Derivative, termination of contract, expense	$ 5,400,000

Subsequent Events (Details)

Subsequent Events (Details) - Germane Systems, LC - USD ($) $ in Thousands	Jul. 30, 2019	Jul. 31, 2018
Subsequent Event [Line Items]
Cash paid at closing		$ 47,166
Subsequent Event
Subsequent Event [Line Items]
Cash paid at closing	$ 100,000

Supplementary Information (Un_3

Supplementary Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Unaudited consolidated quarterly statements of operations data
Net revenues	$ 176,963	$ 174,636	$ 159,089	$ 144,056	$ 152,867	$ 116,336	$ 117,912	$ 106,069	$ 654,744	$ 493,184	$ 408,588
Gross margin	79,839	73,847	70,887	61,583	68,258	52,766	54,160	50,674	286,156	225,858	191,543
Income from operations	20,851	22,062	19,861	13,810	18,888	6,838	10,888	10,371	76,584	46,985	37,403
Income before income taxes	12,587	19,466	16,866	10,608	16,628	5,905	10,468	9,572	59,527	42,573	31,068
Income tax provision (benefit)	(217)	5,357	4,483	3,129	6,527	2,209	1,335	(8,381)	12,752	1,690	6,193
Net income	$ 12,804	$ 14,109	$ 12,383	$ 7,479	$ 10,101	$ 3,696	$ 9,133	$ 17,953	$ 46,775	$ 40,883	$ 24,875
Earnings Per Share [Abstract]
Basic net income per share (in dollars per share)	$ 0.26	$ 0.30	$ 0.26	$ 0.16	$ 0.22	$ 0.08	$ 0.20	$ 0.39	$ 0.98	$ 0.88	$ 0.59
Diluted net income per share (in dollars per share)	$ 0.25	$ 0.29	$ 0.26	$ 0.16	$ 0.21	$ 0.08	$ 0.19	$ 0.38	$ 0.96	$ 0.86	$ 0.58
Cost of revenues									$ 368,588	$ 267,326	$ 217,045