EMCORE (EMKR) 10-Q 9 Feb 22 2022 Q1 Quarterly report Financial data

Cover

Cover - shares	3 Months Ended
	Dec. 31, 2021	Feb. 07, 2022
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Dec. 31, 2021
Document Transition Report	false
Entity File Number	001-36632
Entity Registrant Name	EMCORE Corp
Entity Incorporation, State or Country Code	NJ
Entity Tax Identification Number	22-2746503
Entity Address, Address Line One	2015 W. Chestnut Street
Entity Address, City or Town	Alhambra
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	91803
City Area Code	626
Local Phone Number	293-3400
Title of 12(b) Security	Common stock, no par value
Trading Symbol	EMKR
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		37,277,592
Entity Central Index Key	0000808326
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2022
Current Fiscal Year End Date	--09-30
Amendment Flag	false

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Revenue	$ 42,236	$ 33,426
Cost of revenue	26,439	20,854
Gross profit	15,797	12,572
Operating expense:
Selling, general, and administrative	7,187	5,757
Research and development	4,627	4,296
Restructuring charge	1,298	41
Loss (gain) on sale of assets	187	(29)
Total operating expense	13,299	10,065
Operating income	2,498	2,507
Other income:
Interest expense, net	(11)	(49)
Foreign exchange gain	42	237
Total other income	31	188
Income before income tax expense	2,529	2,695
Income tax expense	(115)	(126)
Net income	2,414	2,569
Foreign exchange translation adjustment	20	(10)
Comprehensive income	$ 2,434	$ 2,559
Per share data
Net income per basic share (in dollars per share)	$ 0.07	$ 0.09
Weighted-average number of basic shares outstanding (in shares)	36,950	29,503
Net income per diluted share (in dollars per share)	$ 0.06	$ 0.08
Weighted-average number of diluted shares outstanding (in shares)	39,031	30,377

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Sep. 30, 2021
Current assets:
Cash and cash equivalents	$ 74,896	$ 71,621
Restricted cash	1,062	61
Accounts receivable, net of credit loss of $425 and $260, respectively	32,382	31,849
Contract assets	238	361
Inventory	31,283	32,309
Prepaid expenses and other current assets	7,046	6,877
Assets held for sale	1,052	1,241
Total current assets	147,959	144,319
Property, plant, and equipment, net	23,219	22,544
Goodwill	69	69
Operating lease right-of-use assets	20,140	13,489
Other intangible assets, net	161	167
Other non-current assets	213	225
Total assets	191,761	180,813
Current liabilities:
Accounts payable	17,033	16,686
Accrued expenses and other current liabilities	10,344	9,936
Operating lease liabilities - current	941	1,198
Total current liabilities	28,318	27,820
Operating lease liabilities - non-current	19,628	12,684
Asset retirement obligations	2,058	2,049
Other long-term liabilities	794	794
Total liabilities	50,798	43,347
Commitments and contingencies (Note 10)
Shareholders’ equity:
Common stock, no par value, 50,000 shares authorized; 44,181 shares issued and 37,275 shares outstanding as of December 31, 2021; 43,890 shares issued and 36,984 shares outstanding as of September 30, 2021	783,329	782,266
Treasury stock at cost; 6,906 shares as of December 31, 2021 and September 30, 2021	(47,721)	(47,721)
Accumulated other comprehensive income	707	687
Accumulated deficit	(595,352)	(597,766)
Total shareholders’ equity	140,963	137,466
Total liabilities and shareholders’ equity	$ 191,761	$ 180,813

Consolidated Balance Sheets (un

Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Sep. 30, 2021
Statement of Financial Position [Abstract]
Allowance for credit loss	$ 425	$ 260
Common stock, no par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	44,181,000	43,890,000
Common stock, shares outstanding (in shares)	37,275,000	36,984,000
Treasury stock, shares held (in shares)	6,906,000	6,906,000

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Treasury Stock	Accumulated other comprehensive income	Accumulated deficit
Beginning balance (in shares) at Sep. 30, 2020		29,551
Shares of common stock
Stock-based compensation (in shares)		230
Stock option exercises (in shares)		2
Ending balance (in shares) at Dec. 31, 2020		29,783
Balance, beginning of period at Sep. 30, 2020		$ 744,361	$ (47,721)	$ 918	$ (623,409)
Shares of common stock
Stock-based compensation		903
Stock option exercises		7
Tax withholding paid on behalf of employees for stock-based awards		(83)
Translation adjustment	$ (10)			(10)
Net income	2,569				2,569
Balance, end of period at Dec. 31, 2020	$ 77,535	$ 745,188	(47,721)	908	(620,840)
Beginning balance (in shares) at Sep. 30, 2021	36,984	36,984
Shares of common stock
Stock-based compensation (in shares)		285
Stock option exercises (in shares)		6
Ending balance (in shares) at Dec. 31, 2021	37,275	37,275
Balance, beginning of period at Sep. 30, 2021		$ 782,266	(47,721)	687	(597,766)
Shares of common stock
Stock-based compensation		1,088
Stock option exercises		29
Tax withholding paid on behalf of employees for stock-based awards		(54)
Translation adjustment	$ 20			20
Net income	2,414				2,414
Balance, end of period at Dec. 31, 2021	$ 140,963	$ 783,329	$ (47,721)	$ 707	$ (595,352)

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income	$ 2,414	$ 2,569
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	1,010	1,005
Stock-based compensation expense	1,088	903
Provision adjustments related to credit loss	165	6
Provision adjustments related to product warranty	77	171
Loss (gain) on disposal of property, plant, and equipment	187	(29)
Other	(60)	(290)
Total non-cash adjustments	2,467	1,766
Changes in operating assets and liabilities:
Accounts receivable and contract assets	(575)	(970)
Inventory	1,126	(1,998)
Other assets	(6,773)	1,694
Accounts payable	546	836
Accrued expenses and other current liabilities	7,008	(2,371)
Total change in operating assets and liabilities	1,332	(2,809)
Net cash provided by operating activities	6,213	1,526
Cash flows from investing activities:
Purchase of equipment	(1,946)	(870)
Proceeds from disposal of property, plant, and equipment	10	0
Net cash used in investing activities	(1,936)	(870)
Cash flows from financing activities:
Proceeds from employee stock purchase plan and equity awards	29	8
Taxes paid related to net share settlement of equity awards	(54)	(83)
Net cash used in financing activities	(25)	(75)
Effect of exchange rate changes provided by foreign currency	24	39
Net increase in cash, cash equivalents, and restricted cash	4,276	620
Cash, cash equivalents, and restricted cash at beginning of period	71,682	30,538
Cash, cash equivalents, and restricted cash at end of period	75,958	31,158
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash paid during the period for interest	15	15
NON-CASH INVESTING AND FINANCING ACTIVITIES
Changes in accounts payable related to purchases of equipment	$ (285)	$ (350)

Description of Business

Description of Business	3 Months Ended
	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business	Description of BusinessEMCORE Corporation (referred to herein, together with its subsidiaries, as the “Company,” “we,” “our,” or “EMCORE”) is a leading provider of sensors for navigation in the aerospace and defense market as well as a manufacturer of lasers and optical subsystems for use in the Cable TV ("CATV") industry. We pioneered the linear fiber optic transmission technology that enabled the world’s first delivery of CATV directly on fiber, and today are a leading provider of advanced products that enable communications systems and service providers to meet growing demand for increased bandwidth and connectivity. The technology at the heart of our broadband communications products is shared with our fiber optic gyroscope (“FOG”) and inertial sensors to provide the aerospace and defense markets with state-of-the-art navigation systems technology. With the acquisition of Systron Donner Inertial, Inc. ("SDI"), a navigation systems provider with a scalable, chip-based platform for higher volume gyro applications utilizing quartz micro-electromechanical system ("QMEMS") technology, in June 2019, we further expanded our portfolio of gyros and inertial sensors with SDI’s QMEMS gyro and accelerometer technology. We have fully vertically-integrated manufacturing capability through our indium phosphide ("InP") compound semiconductor wafer fabrication facility at our headquarters in Alhambra, CA, and through our quartz processing and sensor manufacturing facility in Concord, CA. These facilities support our vertically-integrated manufacturing strategy for quartz and FOG products, for navigation systems, and for our chip, laser, transmitter, and receiver products for broadband applications. With both analog and digital circuits on multiple chips, or even a single chip, the value of Mixed-Signal device solutions is often substantially greater than traditional digital applications and requires a specialized expertise held by us which is unique in the optics industry.

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim information, and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X promulgated by the Securities and Exchange Commission (“SEC”). Accordingly, they do not include all information and notes required by U.S. GAAP for annual financial statements. In our opinion, the interim financial statements reflect all adjustments, which are all normal recurring adjustments, that are necessary to provide a fair presentation of the financial results for the interim periods presented. Operating results for interim periods are not necessarily indicative of results that may be expected for an entire fiscal year. The condensed consolidated balance sheet as of September 30, 2021 has been derived from the audited consolidated financial statements as of such date. For a more complete understanding of our business, financial position, operating results, cash flows, risk factors and other matters, please refer to our Annual Report on Form 10-K for the fiscal year ended September 30, 2021. Significant Accounting Policies and Estimates There have been no material changes in our significant accounting policies and estimates from those disclosed in our Annual Report on Form 10-K for the fiscal year ended September 30, 2021. The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities, as of the date of the financial statements, and the reported amounts of revenue and expenses during the reported period. If these estimates differ significantly from actual results, the impact to the condensed consolidated financial statements may be material. Recent Accounting Pronouncements We recently adopted the following accounting standards, which had the following impacts on our consolidated financial statements: In December 2019, the FASB issued Accounting Standards Update ("ASU") 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes, which simplifies the accounting for income taxes by removing various exceptions, such as the exception to the incremental approach for intra-period tax allocation when there is a loss from continuing operations and income or a gain from other items. The amendments in this update also simplify the accounting for income taxes related to income-based franchise taxes and require that an entity reflect enacted tax laws or rates in the annual effective tax rate computation in the interim period that includes the enactment date. The new standard was effective for our fiscal year beginning October 1, 2021. The adoption of this new standard did not have a material impact on the condensed consolidated financial statements. Other accounting standards that have been issued or proposed by FASB and do not require adoption until a future date are not expected to have a material impact on the consolidated financial statements upon adoption. The Company does not discuss recent pronouncements that are not anticipated to have an impact on or are unrelated to its financial condition, results of operations, cash flows or disclosures.

Cash, Cash Equivalents and Rest

Cash, Cash Equivalents and Restricted Cash	3 Months Ended
	Dec. 31, 2021
Cash and Cash Equivalents [Abstract]
Cash, Cash Equivalents and Restricted Cash	Cash, Cash Equivalents, and Restricted Cash The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the unaudited condensed consolidated balance sheets that sum to the total of the same amounts shown in the unaudited condensed consolidated statements of cash flows: As of (in thousands) December 31, 2021 September 30, 2021 Cash $ 19,820 $ 16,547 Cash equivalents 55,076 55,074 Restricted cash 1,062 61 Total cash, cash equivalents, and restricted cash $ 75,958 $ 71,682

Accounts Receivable, net

Accounts Receivable, net	3 Months Ended
	Dec. 31, 2021
Receivables [Abstract]
Accounts Receivable, net	Accounts Receivable, net The components of accounts receivable consisted of the following: As of (in thousands) December 31, 2021 September 30, 2021 Accounts receivable, gross $ 32,807 $ 32,109 Allowance for credit loss (425) (260) Accounts receivable, net $ 32,382 $ 31,849

Inventory

Inventory	3 Months Ended
	Dec. 31, 2021
Inventory Disclosure [Abstract]
Inventory	Inventory The components of inventory consisted of the following: As of (in thousands) December 31, 2021 September 30, 2021 Raw materials $ 15,130 $ 16,146 Work in-process 10,446 11,410 Finished goods 5,707 4,753 Inventory $ 31,283 $ 32,309

Property, Plant, and Equipment,

Property, Plant, and Equipment, net	3 Months Ended
	Dec. 31, 2021
Property, Plant and Equipment [Abstract]
Property, Plant, and Equipment, net	Property, Plant, and Equipment, netThe components of property, plant, and equipment, net consisted of the following: As of (in thousands) December 31, 2021 September 30, 2021 Equipment $ 38,131 $ 37,985 Furniture and fixtures 1,125 1,125 Computer hardware and software 3,576 3,575 Leasehold improvements 6,699 6,663 Construction in progress 10,563 9,247 Property, plant, and equipment, gross $ 60,094 $ 58,595 Accumulated depreciation (36,875) (36,051) Property, plant, and equipment, net $ 23,219 $ 22,544 During the three months ended December 31, 2021 and 2020, the Company sold certain equipment and recognized a loss on sale of assets of $0.2 million and $0.0 million, respectively. In addition, in the fiscal year ended September 30, 2020, the Company entered into agreements to sell equipment and these assets were reclassified to assets held for sale. The balance as of December 31, 2021 and September 30, 2021 was $1.1 million and $1.2 million, respectively. Geographical Concentrations Long-lived assets consist of land, building, property, plant, and equipment. As of December 31, 2021 and September 30, 2021, 97% and 96%, respectively, of our long-lived assets were located in the United States. The remaining long-lived assets are primarily located in China.

Accrued Expenses and Other Curr

Accrued Expenses and Other Current Liabilities	3 Months Ended
	Dec. 31, 2021
Payables and Accruals [Abstract]
Accrued Expenses and Other Current Liabilities	Accrued Expenses and Other Current Liabilities The components of accrued expenses and other current liabilities consisted of the following: As of (in thousands) December 31, 2021 September 30, 2021 Compensation $ 5,180 $ 7,192 Warranty 1,160 1,125 Legal expenses and other professional fees 464 152 Contract liabilities 873 364 Income and other taxes 219 104 Severance and restructuring accruals 1,113 — Other 1,335 999 Accrued expenses and other current liabilities $ 10,344 $ 9,936

Credit Facilities and Debt

Credit Facilities and Debt	3 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Credit Facilities and Debt	Credit Facility and Debt Credit Facility On November 11, 2010, we entered into a Credit and Security Agreement (as amended to date, the “Credit Facility”) with Wells Fargo Bank, N.A. ("Wells Fargo"). The Credit Facility is secured by the Company’s assets and is subject to a borrowing base formula based on the Company’s eligible accounts receivable, inventory, and machinery and equipment accounts. In February 2022, we entered into an extension wherein the Credit Facility is to mature in May 2022. The Credit Facility currently provides us with a revolving credit line of up to $15.0 million at an interest rate equal to LIBOR plus 1.75%, subject to a borrowing base formula, that can be used for working capital requirements, letters of credit, acquisitions, and other general corporate purposes subject to a requirement, for certain specific uses, that the Company has liquidity of at least $25.0 million after such use. The Credit Facility requires us to maintain (a) liquidity of at least $10.0 million and (b) excess availability of at least $1.0 million. As of December 31, 2021, there was no amount outstanding under this Credit Facility and the Company was in compliance with all financial covenants. Also, as of December 31, 2021, the Credit Facility had $0.5 million reserved for one outstanding stand-by letter of credit and $13.4 million available for borrowing.

Income and Other Taxes

Income and Other Taxes	3 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income and Other Taxes	Income and Other Taxes During each of the three months ended December 31, 2021 and 2020, the Company recorded an income tax expense of $0.1 million. Income tax expense for the three months ended December 31, 2021 and 2020 is composed primarily of state tax expense which is driven by the State of California's temporary suspension of net operating loss ("NOL") utilization. For the three months ended December 31, 2021 and 2020 the effective tax rate on continuing operations was 4.5% and 4.7%, respectively. The tax rate for the three months ended December 31, 2021 is primarily driven by the State of California’s temporary suspension of NOL utilization. The Company uses estimates to forecast the results from continuing operations for the current fiscal year as well as permanent differences between book and tax accounting. We have not provided for income taxes on non-U.S. subsidiaries’ undistributed earnings as of December 31, 2021 because we plan to indefinitely reinvest the unremitted earnings of our non-U.S. subsidiaries and all of our non-U.S. subsidiaries historically have negative earnings and profits. All deferred tax assets have a full valuation allowance at December 31, 2021. On a quarterly basis, the Company evaluates the positive and negative evidence to assess whether the more likely than not criteria has been satisfied in determining whether there will be further adjustments to the valuation allowance. As of December 31, 2021 and September 30, 2021, we had no uncertain tax benefit reserved and no interest and penalties accrued as tax liabilities on our balance sheet. During the three months ended December 31, 2021 and 2020 there were no material increases or decreases in unrecognized tax benefits.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Indemnifications We have agreed to indemnify certain customers against claims of infringement of intellectual property rights of others in our sales contracts with these customers. Historically, we have not paid any claims under these customer indemnification obligations. We enter into indemnification agreements with each of our directors and executive officers pursuant to which we agree to indemnify them for certain potential expenses and liabilities arising from their status as a director or executive officer of the Company. We maintain directors and officers insurance, which covers certain liabilities relating to our obligation to indemnify our directors and executive officers in certain circumstances. It is not possible to determine the aggregate maximum potential loss under these indemnification agreements due to the limited history of prior indemnification claims and the unique facts and circumstances involved in each particular claim. Legal Proceedings We are subject to various legal proceedings, claims, and litigation, either asserted or unasserted, that arise in the ordinary course of business. The outcome of these matters is currently not determinable and we are unable to estimate a range of loss, should a loss occur, from these proceedings. The ultimate outcome of legal proceedings involves judgments, estimates and inherent uncertainties and the results of these matters cannot be predicted with certainty. Professional legal fees are expensed when incurred. We accrue for contingent losses when such losses are probable and reasonably estimable. In the event that estimates or assumptions prove to differ from actual results, adjustments are made in subsequent periods to reflect more current information. Should we fail to prevail in any legal matter, or should several legal matters be resolved against the Company in the same reporting period, then the financial results of that particular reporting period could be materially affected. Intellectual Property Lawsuits We protect our proprietary technology by applying for patents where appropriate and, in other cases, by preserving the technology, related know-how and information as trade secrets. The success and competitive position of our product lines are impacted by our ability to obtain intellectual property protection for our research and development efforts. We have, from time to time, exchanged correspondence with third parties regarding the assertion of patent or other intellectual property rights in connection with certain of our products and processes. Resilience Litigation In February 2021, Resilience Capital (“Resilience”) filed a complaint against us with the Delaware Chancery Court containing claims arising from the February 2020 sale of SDI’s real property (the “Concord Property Sale”) located in Concord, California (the “Concord Real Property”) to Eagle Rock Holdings, LP (“Buyer”) and that certain Single-Tenant Triple Net Lease, dated as of February 10, 2020, entered into by and between SDI and the Buyer, pursuant to which SDI leased from the Buyer the Concord Real Property for a 15 year term. The Resilience complaint seeks, among other items, (a) a declaration that the Concord Property Sale included a non-cash component; (b) a decree requiring us and Resilience to follow the appraisal requirements set forth in that certain Purchase and Sale Agreement (the "SDI Purchase Agreement"), dated as of June 7, 2019, by and among the Company, The Resilience Fund IV, L.P., The Resilience Fund IV-A, L.P., Aerospace Newco Holdings, Inc. and Ember Acquisition Sub, Inc.; (c) recovery of Resilience’s costs and expenses; and (d) pre- and post-judgment interest. In April 2021, we filed with the Delaware Chancery Court our answer to the Resilience complaint and counterclaims against Resilience, in which we are seeking, among other items, (a) dismissal of the Resilience complaint and/or granting of judgment in favor of EMCORE with respect to the Resilience complaint, (b) entering final judgment against Resilience awarding damages to us for Resilience’s fraud and breaches of the SDI Purchase Agreement in an amount to be proven at trial and not less than $1,565,000, (c) a judicial determination of the respective rights and duties of us and Resilience under the SDI Purchase Agreement, (d) an award to us of costs and expenses and (e) pre- and post-judgment interest. We believe that the claims made by Resilience in its complaint are without merit and we intend to vigorously defend ourselves against them.

Equity

Equity	3 Months Ended
	Dec. 31, 2021
Equity [Abstract]
Equity	Equity Equity Plans We provide long-term incentives to eligible officers, directors, and employees in the form of equity-based awards. We maintain three equity incentive compensation plans, collectively described as our “Equity Plans”: • the 2010 Equity Incentive Plan, • the 2012 Equity Incentive Plan, and • the 2019 Equity Incentive Plan. We issue new shares of common stock to satisfy awards granted under our Equity Plans. In March 2021, our shareholders approved the Amended and Restated EMCORE Corporation 2019 Equity Incentive Plan, which was adopted by the Company’s Board of Directors in December 2020, and increased the maximum number of shares of the Company’s common stock that may be issued or transferred pursuant to awards under the 2019 Equity Incentive Plan by an additional 2,138,000 shares. Stock-Based Compensation The following table sets forth stock-based compensation expense by award type: For the Three Months Ended December 31, (in thousands) 2021 2020 Employee stock options $ — $ 1 RSUs and RSAs 554 431 PSUs and PRSAs 407 317 ESPP — 89 Outside director equity awards and fees in common stock 127 65 Total stock-based compensation expense $ 1,088 $ 903 The following table sets forth stock-based compensation expense by expense type: For the Three Months Ended December 31, (in thousands) 2021 2020 Cost of revenue $ 151 $ 141 Selling, general, and administrative 755 559 Research and development 182 203 Total stock-based compensation expense $ 1,088 $ 903 401(k) Plan We have a savings plan that qualifies as a deferred salary arrangement under Section 401(k) of the Internal Revenue Code. Under this savings plan, participating employees may defer a portion of their pretax earnings, up to the Internal Revenue Service annual contribution limit. Since June 2015, all employer contributions are made in cash. During each of the three months ended December 31, 2021 and 2020, our matching contribution in cash was $0.3 million. Income Per Share The following table sets forth the computation of basic and diluted net income per share: For the Three Months Ended December 31, (in thousands, except per share data) 2021 2020 Numerator Net income $ 2,414 $ 2,569 Denominator Weighted average number of shares outstanding - basic 36,950 29,503 Effect of dilutive securities Stock options 7 — PSUs, RSUs, and restricted stock 2,074 874 Weighted average number of shares outstanding - diluted 39,031 30,377 Earnings per share - basic $ 0.07 $ 0.09 Earnings per share - diluted $ 0.06 $ 0.08 Weighted average antidilutive options, unvested restricted RSUs and RSAs, unvested PSUs and ESPP shares excluded from the computation 53 161 Basic earnings per share ("EPS") is computed by dividing net income for the period by the weighted-average number of common stock outstanding during the period. Diluted EPS is computed by dividing net income for the period by the weighted average number of common stock outstanding during the period, plus the dilutive effect of outstanding restricted stock units ("RSUs") and restricted stock awards ("RSAs"), performance stock units ("PSUs"), stock options, and shares issuable under the employee stock purchase plan ("ESPP") as applicable pursuant to the treasury stock method. Certain of the Company's outstanding share-based awards, noted in the table above, were excluded because they were anti-dilutive, but they could become dilutive in the future. Future Issuances As of December 31, 2021, we had common stock reserved for the following future issuances: Number of Common Stock Shares Available for Future Issuances Exercise of outstanding stock options 13,884 Unvested RSUs and RSAs 1,462,942 Unvested PSUs and PRSAs (at 200% maximum payout) 1,934,000 Issuance of stock-based awards under the Equity Plans 1,748,593 Purchases under the officer and director share purchase plan 88,741 Total reserved 5,248,160

Segment Data and Related Inform

Segment Data and Related Information	3 Months Ended
	Dec. 31, 2021
Segment Reporting [Abstract]
Segment Data and Related Information	Segment and Revenue Information Reportable Segments Reported below are the Company’s segments for which separate financial information is available and upon which operating results are evaluated by the chief operating decision maker, the Chief Executive Officer, to assess performance and to allocate resources. We do not allocate sales and marketing, general and administrative expenses, or interest expense and interest income to our segments, because management does not include the information in its measurement of the performance of the operating segments. Also, a measure of segment assets and liabilities has not been provided to the Company's chief operating decision maker and therefore is not shown below. Information on reportable segments utilized by the chief operating decision maker is as follows: (in thousands) For the Three Months Ended December 31, 2021 2020 Revenue Aerospace and Defense $ 9,900 $ 13,636 Broadband 32,336 19,790 Total revenue $ 42,236 $ 33,426 Segment income Aerospace and Defense gross profit $ 1,684 $ 4,100 Aerospace and Defense research and development expense 4,162 3,686 Aerospace and Defense segment income $ (2,478) $ 414 Broadband gross profit $ 14,113 $ 8,472 Broadband research and development expense 465 610 Broadband segment income $ 13,648 $ 7,862 Consolidated segment income $ 11,170 $ 8,276 Unallocated expense Selling, general, and administrative $ 7,187 $ 5,757 Restructuring charge 1,298 41 Loss (gain) on sale of assets 187 (29) Interest expense, net 11 49 Foreign exchange gain (42) (237) Total unallocated expense $ 8,641 $ 5,581 Income before income tax expense $ 2,529 $ 2,695 Product Categories Revenue is classified by major product category and is presented below: For the Three Months Ended December 31, (in thousands) 2021 % of 2020 % of Aerospace and Defense Navigation and Inertial Sensing $ 8,145 19 % $ 9,202 28 % Defense Optoelectronics 1,755 4 4,434 13 Broadband CATV Lasers and Transmitters 28,459 67 17,315 52 Chip Devices 1,068 3 743 2 Other Optical Products 2,809 7 1,732 5 Total revenue $ 42,236 100 % $ 33,426 100 % Geographical Concentration The following table sets forth revenue by geographic area based on our customers’ billing address: For the Three Months Ended December 31, (in thousands) 2021 2020 United States and Canada $ 38,056 $ 29,346 Asia 3,086 3,025 Europe 820 656 Other 274 399 Total revenue $ 42,236 $ 33,426 Significant Customers Significant customers are defined as customers representing greater than 10% of consolidated revenue. Significant portions of the Company’s sales are concentrated among a limited number of customers. Revenue from two and three of our significant customers represented an aggregate of 65% and 70% of our consolidated revenue for the three months ended December 31, 2021 and 2020, respectively. The percentage from significant customers decreased due to lower Aerospace and Defense revenue. The duration, severity, and future impact of the COVID-19 pandemic are highly uncertain and could result in significant disruptions to the business operations of the Company’s customers. If one or more of these significant customers significantly decreases their orders for the Company’s products, or if we are unable to deliver finished products to the customer in connection with such orders, the Company’s business could be materially and adversely affected.

Organization, Consolidation and

Organization, Consolidation and Presentation of Financial Statements (Policies)	3 Months Ended
	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim information, and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X promulgated by the Securities and Exchange Commission (“SEC”). Accordingly, they do not include all information and notes required by U.S. GAAP for annual financial statements. In our opinion, the interim financial statements reflect all adjustments, which are all normal recurring adjustments, that are necessary to provide a fair presentation of the financial results for the interim periods presented. Operating results for interim periods are not necessarily indicative of results that may be expected for an entire fiscal year. The condensed consolidated balance sheet as of September 30, 2021 has been derived from the audited consolidated financial statements as of such date. For a more complete understanding of our business, financial position, operating results, cash flows, risk factors and other matters, please refer to our Annual Report on Form 10-K for the fiscal year ended September 30, 2021.
Significant Accounting Policies and Estimates	Significant Accounting Policies and Estimates There have been no material changes in our significant accounting policies and estimates from those disclosed in our Annual Report on Form 10-K for the fiscal year ended September 30, 2021.
Recent Accounting Pronouncements	Recent Accounting Pronouncements We recently adopted the following accounting standards, which had the following impacts on our consolidated financial statements: In December 2019, the FASB issued Accounting Standards Update ("ASU") 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes, which simplifies the accounting for income taxes by removing various exceptions, such as the exception to the incremental approach for intra-period tax allocation when there is a loss from continuing operations and income or a gain from other items. The amendments in this update also simplify the accounting for income taxes related to income-based franchise taxes and require that an entity reflect enacted tax laws or rates in the annual effective tax rate computation in the interim period that includes the enactment date. The new standard was effective for our fiscal year beginning October 1, 2021. The adoption of this new standard did not have a material impact on the condensed consolidated financial statements. Other accounting standards that have been issued or proposed by FASB and do not require adoption until a future date are not expected to have a material impact on the consolidated financial statements upon adoption. The Company does not discuss recent pronouncements that are not anticipated to have an impact on or are unrelated to its financial condition, results of operations, cash flows or disclosures.
Legal Costs	Professional legal fees are expensed when incurred. We accrue for contingent losses when such losses are probable and reasonably estimable.

Cash, Cash Equivalents and Re_2

Cash, Cash Equivalents and Restricted Cash (Tables)	3 Months Ended
	Dec. 31, 2021
Cash and Cash Equivalents [Abstract]
Schedule of Cash, Cash Equivalents and Restricted Cash	The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the unaudited condensed consolidated balance sheets that sum to the total of the same amounts shown in the unaudited condensed consolidated statements of cash flows: As of (in thousands) December 31, 2021 September 30, 2021 Cash $ 19,820 $ 16,547 Cash equivalents 55,076 55,074 Restricted cash 1,062 61 Total cash, cash equivalents, and restricted cash $ 75,958 $ 71,682
Schedule of Cash, Cash Equivalents and Restricted Cash	The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the unaudited condensed consolidated balance sheets that sum to the total of the same amounts shown in the unaudited condensed consolidated statements of cash flows: As of (in thousands) December 31, 2021 September 30, 2021 Cash $ 19,820 $ 16,547 Cash equivalents 55,076 55,074 Restricted cash 1,062 61 Total cash, cash equivalents, and restricted cash $ 75,958 $ 71,682

Accounts Receivable, net (Table

Accounts Receivable, net (Tables)	3 Months Ended
	Dec. 31, 2021
Receivables [Abstract]
Components of Accounts Receivable, net	The components of accounts receivable consisted of the following: As of (in thousands) December 31, 2021 September 30, 2021 Accounts receivable, gross $ 32,807 $ 32,109 Allowance for credit loss (425) (260) Accounts receivable, net $ 32,382 $ 31,849

Inventory (Tables)

Inventory (Tables)	3 Months Ended
	Dec. 31, 2021
Inventory Disclosure [Abstract]
Schedule of Inventory	The components of inventory consisted of the following: As of (in thousands) December 31, 2021 September 30, 2021 Raw materials $ 15,130 $ 16,146 Work in-process 10,446 11,410 Finished goods 5,707 4,753 Inventory $ 31,283 $ 32,309

Property, Plant, and Equipmen_2

Property, Plant, and Equipment, net (Tables)	3 Months Ended
	Dec. 31, 2021
Property, Plant and Equipment [Abstract]
Schedule of Property, Plant and Equipment	The components of property, plant, and equipment, net consisted of the following: As of (in thousands) December 31, 2021 September 30, 2021 Equipment $ 38,131 $ 37,985 Furniture and fixtures 1,125 1,125 Computer hardware and software 3,576 3,575 Leasehold improvements 6,699 6,663 Construction in progress 10,563 9,247 Property, plant, and equipment, gross $ 60,094 $ 58,595 Accumulated depreciation (36,875) (36,051) Property, plant, and equipment, net $ 23,219 $ 22,544

Accrued Expenses and Other Cu_2

Accrued Expenses and Other Current Liabilities (Tables)	3 Months Ended
	Dec. 31, 2021
Payables and Accruals [Abstract]
Schedule of Components of Accrued Expenses and Other Current Liabilities	The components of accrued expenses and other current liabilities consisted of the following: As of (in thousands) December 31, 2021 September 30, 2021 Compensation $ 5,180 $ 7,192 Warranty 1,160 1,125 Legal expenses and other professional fees 464 152 Contract liabilities 873 364 Income and other taxes 219 104 Severance and restructuring accruals 1,113 — Other 1,335 999 Accrued expenses and other current liabilities $ 10,344 $ 9,936

Equity (Tables)

Equity (Tables)	3 Months Ended
	Dec. 31, 2021
Equity [Abstract]
Schedule of Stock-based Compensation Expense - By Award Type	The following table sets forth stock-based compensation expense by award type: For the Three Months Ended December 31, (in thousands) 2021 2020 Employee stock options $ — $ 1 RSUs and RSAs 554 431 PSUs and PRSAs 407 317 ESPP — 89 Outside director equity awards and fees in common stock 127 65 Total stock-based compensation expense $ 1,088 $ 903
Schedule of Stock-based Compensation Expense - By Expense Type	The following table sets forth stock-based compensation expense by expense type: For the Three Months Ended December 31, (in thousands) 2021 2020 Cost of revenue $ 151 $ 141 Selling, general, and administrative 755 559 Research and development 182 203 Total stock-based compensation expense $ 1,088 $ 903
Schedule of Earnings Per Share, Basic and Diluted	The following table sets forth the computation of basic and diluted net income per share: For the Three Months Ended December 31, (in thousands, except per share data) 2021 2020 Numerator Net income $ 2,414 $ 2,569 Denominator Weighted average number of shares outstanding - basic 36,950 29,503 Effect of dilutive securities Stock options 7 — PSUs, RSUs, and restricted stock 2,074 874 Weighted average number of shares outstanding - diluted 39,031 30,377 Earnings per share - basic $ 0.07 $ 0.09 Earnings per share - diluted $ 0.06 $ 0.08 Weighted average antidilutive options, unvested restricted RSUs and RSAs, unvested PSUs and ESPP shares excluded from the computation 53 161
Schedule of Common Stock Reserved for Future Issuances	As of December 31, 2021, we had common stock reserved for the following future issuances: Number of Common Stock Shares Available for Future Issuances Exercise of outstanding stock options 13,884 Unvested RSUs and RSAs 1,462,942 Unvested PSUs and PRSAs (at 200% maximum payout) 1,934,000 Issuance of stock-based awards under the Equity Plans 1,748,593 Purchases under the officer and director share purchase plan 88,741 Total reserved 5,248,160

Segment Data and Related Info_2

Segment Data and Related Information (Tables)	3 Months Ended
	Dec. 31, 2021
Segment Reporting [Abstract]
Schedule of Reportable Segment	Information on reportable segments utilized by the chief operating decision maker is as follows: (in thousands) For the Three Months Ended December 31, 2021 2020 Revenue Aerospace and Defense $ 9,900 $ 13,636 Broadband 32,336 19,790 Total revenue $ 42,236 $ 33,426 Segment income Aerospace and Defense gross profit $ 1,684 $ 4,100 Aerospace and Defense research and development expense 4,162 3,686 Aerospace and Defense segment income $ (2,478) $ 414 Broadband gross profit $ 14,113 $ 8,472 Broadband research and development expense 465 610 Broadband segment income $ 13,648 $ 7,862 Consolidated segment income $ 11,170 $ 8,276 Unallocated expense Selling, general, and administrative $ 7,187 $ 5,757 Restructuring charge 1,298 41 Loss (gain) on sale of assets 187 (29) Interest expense, net 11 49 Foreign exchange gain (42) (237) Total unallocated expense $ 8,641 $ 5,581 Income before income tax expense $ 2,529 $ 2,695
Schedule of Revenue by Major Product Category	Revenue is classified by major product category and is presented below: For the Three Months Ended December 31, (in thousands) 2021 % of 2020 % of Aerospace and Defense Navigation and Inertial Sensing $ 8,145 19 % $ 9,202 28 % Defense Optoelectronics 1,755 4 4,434 13 Broadband CATV Lasers and Transmitters 28,459 67 17,315 52 Chip Devices 1,068 3 743 2 Other Optical Products 2,809 7 1,732 5 Total revenue $ 42,236 100 % $ 33,426 100 %
Schedule of Revenue by Geographic Region	The following table sets forth revenue by geographic area based on our customers’ billing address: For the Three Months Ended December 31, (in thousands) 2021 2020 United States and Canada $ 38,056 $ 29,346 Asia 3,086 3,025 Europe 820 656 Other 274 399 Total revenue $ 42,236 $ 33,426

Cash, Cash Equivalents and Re_3

Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020
Cash and Cash Equivalents [Abstract]
Cash	$ 19,820	$ 16,547
Cash equivalents	55,076	55,074
Restricted cash	1,062	61
Total cash, cash equivalents, and restricted cash	$ 75,958	$ 71,682	$ 31,158	$ 30,538

Accounts Receivable, net - Sche

Accounts Receivable, net - Schedule of Components of Accounts Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Sep. 30, 2021
Receivables [Abstract]
Accounts receivable, gross	$ 32,807	$ 32,109
Allowance for credit loss	(425)	(260)
Accounts receivable, net	$ 32,382	$ 31,849

Inventory - Schedule of Compone

Inventory - Schedule of Components of Inventory (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Sep. 30, 2021
Inventory Disclosure [Abstract]
Raw materials	$ 15,130	$ 16,146
Work in-process	10,446	11,410
Finished goods	5,707	4,753
Inventory	$ 31,283	$ 32,309

Property, Plant, and Equipmen_3

Property, Plant, and Equipment, net - Schedule of Property, Plant, and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Sep. 30, 2021
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 60,094	$ 58,595
Accumulated depreciation	(36,875)	(36,051)
Property, plant, and equipment, net	23,219	22,544
Equipment
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	38,131	37,985
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	1,125	1,125
Computer hardware and software
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	3,576	3,575
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	6,699	6,663
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 10,563	$ 9,247

Property, Plant, and Equipmen_4

Property, Plant, and Equipment, net - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Sep. 30, 2021
Property, Plant and Equipment [Line Items]
Loss on sale of equipment	$ 0.2	$ 0
United States | Long-lived Assets | Geographic Concentration Risk
Property, Plant and Equipment [Line Items]
Concentration risk, percentage	97.00%		96.00%
Disposal Group, Held-for-sale, Not Discontinued Operations
Property, Plant and Equipment [Line Items]
Property, plant, and equipment held for sale	$ 1.1		$ 1.2

Accrued Expenses and Other Cu_3

Accrued Expenses and Other Current Liabilities - Schedule of Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Sep. 30, 2021
Payables and Accruals [Abstract]
Compensation	$ 5,180	$ 7,192
Warranty	1,160	1,125
Legal expenses and other professional fees	464	152
Contract liabilities	873	364
Income and other taxes	219	104
Severance and restructuring accruals	1,113	0
Other	1,335	999
Accrued expenses and other current liabilities	$ 10,344	$ 9,936

Credit Facilities and Debt - Na

Credit Facilities and Debt - Narrative (Details) - Revolving Credit Facility	3 Months Ended
	Dec. 31, 2021USD ($)credit
Line of Credit Facility [Line Items]
Liquidity requirement, minimum after specific uses (at least)	$ 25,000,000
Liquidity requirement, minimum (at least)	10,000,000
Excess availability requirement, minimum (at least)	1,000,000
Long-term line of credit	0
Standby letters of credit, total amount outstanding	500,000
Remaining borrowing capacity	13,400,000
Tenth Amendment
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 15,000,000
Tenth Amendment | London Interbank Offered Rate (LIBOR)
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.75%
LIBOR Rate Loan
Line of Credit Facility [Line Items]
Number of standby letters of credit outstanding | credit	1

Income and Other Taxes - Narrat

Income and Other Taxes - Narrative (Details) - USD ($)	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Income tax expense	$ 115,000	$ 126,000
Effective tax rate on continuing operations	4.50%	4.70%
Uncertain tax benefit reserve	$ 0		$ 0
Interest and penalties accrued as tax liabilities	0		$ 0
Uncertain tax reserve, period increase (decrease)	$ 0	$ 0

Commitments and Contingencies (

Commitments and Contingencies (Details) - Resilience Litigation - USD ($) $ in Thousands	1 Months Ended
	Apr. 30, 2021	Feb. 10, 2020
Resilience Capital
Loss Contingencies [Line Items]
Damages sought value (not less than)	$ 1,565
Concord Property
Loss Contingencies [Line Items]
Lease length in years		15 years

Equity - Narrative (Details)

Equity - Narrative (Details) $ in Millions	1 Months Ended	3 Months Ended
	Mar. 31, 2021shares	Dec. 31, 2021USD ($)plan	Dec. 31, 2020USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of equity incentive compensation plans maintained by the company | plan		3
Matching contribution | $		$ 0.3	$ 0.3
2019 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional number of shares authorized for the plan (in shares) | shares	2,138,000

Equity - Schedule of Stock-base

Equity - Schedule of Stock-based Compensation Expense - by Award Type (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 1,088	$ 903
Employee stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	0	1
RSUs and RSAs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	554	431
PSUs and PRSAs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	407	317
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	0	89
Outside director equity awards and fees in common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 127	$ 65

Equity - Schedule of Stock-ba_2

Equity - Schedule of Stock-based Compensation Expense - by Expense Category (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 1,088	$ 903
Cost of revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	151	141
Selling, general, and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	755	559
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 182	$ 203

Equity - Schedule of Earnings p

Equity - Schedule of Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Numerator:
Net income	$ 2,414	$ 2,569
Denominator
Weighted average number of shares outstanding - basic (in shares)	36,950	29,503
Effect of dilutive securities
Weighted average number of shares outstanding - diluted (in shares)	39,031	30,377
Earnings per share - basic (in dollars per share)	$ 0.07	$ 0.09
Earnings per share - diluted (in dollars per share)	$ 0.06	$ 0.08
Weighted average antidilutive options, unvested restricted RSUs and RSAs, unvested PSUs and ESPP shares excluded from the computation (in shares)	53	161
Stock options
Effect of dilutive securities
Dilutive options outstanding, unvested stock units and unvested stock awards (in shares)	7	0
PSUs, RSUs, and restricted stock
Effect of dilutive securities
Dilutive options outstanding, unvested stock units and unvested stock awards (in shares)	2,074	874

Equity - Schedule of Common Sto

Equity - Schedule of Common Stock Reserved for Future Issuances (Details)	Dec. 31, 2021shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise of outstanding stock options (in shares)	13,884
Issuance of stock-based awards under the Equity Plans (in shares)	1,748,593
Purchases under the officer and director share purchase plan (in shares)	88,741
Total reserved (in shares)	5,248,160
RSUs and RSAs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted stock units and awards (in shares)	1,462,942
PSUs and PRSAs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested award potential, percentage	200.00%
Unvested performance stock units and awards (in shares)	1,934,000

Segment Data and Related Info_3

Segment Data and Related Information - Schedule of Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Revenue	$ 42,236	$ 33,426
Gross profit	15,797	12,572
R&D expense	4,627	4,296
Operating income	2,498	2,507
Unallocated expense
Selling, general, and administrative	7,187	5,757
Restructuring charge	1,298	41
Loss (gain) on sale of assets	187	(29)
Interest expense, net	11	49
Foreign exchange gain	(42)	(237)
Total unallocated expense	8,641	5,581
Income before income tax expense	2,529	2,695
Operating segments
Segment Reporting Information [Line Items]
Revenue	42,236	33,426
Operating income	11,170	8,276
Operating segments | Aerospace And Defense
Segment Reporting Information [Line Items]
Revenue	9,900	13,636
Gross profit	1,684	4,100
R&D expense	4,162	3,686
Operating income	(2,478)	414
Operating segments | Broadband
Segment Reporting Information [Line Items]
Revenue	32,336	19,790
Gross profit	14,113	8,472
R&D expense	465	610
Operating income	$ 13,648	$ 7,862

Segment Data and Related Info_4

Segment Data and Related Information - Revenue by Product (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 42,236	$ 33,426
Product Concentration Risk | Revenue, Product and Service Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	100.00%	100.00%
Navigation and Inertial Sensing
Disaggregation of Revenue [Line Items]
Revenue	$ 8,145	$ 9,202
Navigation and Inertial Sensing | Product Concentration Risk | Revenue, Product and Service Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	19.00%	28.00%
Defense Optoelectronics
Disaggregation of Revenue [Line Items]
Revenue	$ 1,755	$ 4,434
Defense Optoelectronics | Product Concentration Risk | Revenue, Product and Service Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	4.00%	13.00%
CATV Lasers and Transmitters
Disaggregation of Revenue [Line Items]
Revenue	$ 28,459	$ 17,315
CATV Lasers and Transmitters | Product Concentration Risk | Revenue, Product and Service Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	67.00%	52.00%
Chip Devices
Disaggregation of Revenue [Line Items]
Revenue	$ 1,068	$ 743
Chip Devices | Product Concentration Risk | Revenue, Product and Service Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	3.00%	2.00%
Other Optical Products
Disaggregation of Revenue [Line Items]
Revenue	$ 2,809	$ 1,732
Other Optical Products | Product Concentration Risk | Revenue, Product and Service Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	7.00%	5.00%

Segment Data and Related Info_5

Segment Data and Related Information - Schedule of Revenue by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Segment revenue	$ 42,236	$ 33,426
United States and Canada
Segment Reporting Information [Line Items]
Segment revenue	38,056	29,346
Asia
Segment Reporting Information [Line Items]
Segment revenue	3,086	3,025
Europe
Segment Reporting Information [Line Items]
Segment revenue	820	656
Other
Segment Reporting Information [Line Items]
Segment revenue	$ 274	$ 399

Segment Data and Related Info_6

Segment Data and Related Information - Narrative (Details) - Sales Revenue, Segment - Customer Concentration Risk	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Two Significant Customers
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Concentration risk, percentage	65.00%
Three Significant Customers
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Concentration risk, percentage		70.00%