Cray (CRAY) 10-Q 2 Aug 19 2019 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Jul. 31, 2019
Document and Entity Information [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2019
Document Transition Report	false
Entity File Number	0-26820
Entity Registrant Name	CRAY INC.
Entity Incorporation, State or Country Code	WA
Entity Tax Identification Number	93-0962605
Entity Address, Address Line One	901 Fifth Avenue, Suite 1000
Entity Address, Postal Zip Code	98164
Entity Address, City or Town	Seattle,
Entity Address, State or Province	WA
City Area Code	206
Local Phone Number	701-2000
Title of 12(b) Security	Common Stock
Trading Symbol	CRAY
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Emerging Growth company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		41,414,306
Entity Central Index Key	0000949158
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--12-31

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands		Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents		$ 147,533	$ 228,434
Restricted cash	[1]	3,772	1,300
Accounts and other receivables, net		76,501	87,819
Inventory		88,035	80,360
Prepaid expenses and other current assets		25,053	22,331
Total current assets		340,894	420,244
Long-term restricted cash	[1]	13,847	16,030
Property and equipment, net		38,290	35,737
Operating lease right-of-use assets		32,656	0
Goodwill		14,182	14,182
Intangible assets other than goodwill, net		2,602	3,178
Other non-current assets		17,200	27,761
TOTAL ASSETS		459,671	517,132
Current liabilities:
Accounts payable		30,098	32,847
Accrued payroll and related expenses		20,462	23,703
Accrued and other liabilities		13,206	10,805
Customer contract liabilities		54,353	61,983
Total current liabilities		118,119	129,338
Long-term customer contract liabilities		23,077	32,021
Long-term operating lease liabilities		39,845	0
Other non-current liabilities		2,384	12,394
TOTAL LIABILITIES		183,425	173,753
Shareholders’ equity:
Preferred stock — Authorized and undesignated, 5,000,000 shares; no shares issued or outstanding		0	0
Common stock and additional paid-in capital, par value $.01 per share — Authorized, 75,000,000 shares; issued and outstanding 41,337,879 and 40,893,807 shares, respectively		654,948	647,045
Accumulated other comprehensive income		1,534	3,208
Accumulated deficit		(380,236)	(306,874)
TOTAL SHAREHOLDERS’ EQUITY		276,246	343,379
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY		$ 459,671	$ 517,132
[1]	Restricted cash primarily associated with certain letters of credit to secure customer prepayments and other customer related obligations.

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares	Jun. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock and additional paid-in capital, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock and additional paid-in capital, shares authorized	75,000,000	75,000,000
Common stock and additional paid-in capital, shares issued	41,337,879	40,893,807
Common stock and additional paid-in capital, shares outstanding	41,337,879	40,893,807

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue:
Total revenue	$ 68,699	$ 120,203	$ 140,245	$ 199,797
Cost of revenue:
Total cost of revenue	44,752	82,396	90,274	135,038
Gross profit	23,947	37,807	49,971	64,759
Operating expenses:
Research and development, net	37,171	29,382	72,957	59,274
Sales and marketing	14,919	15,218	29,194	30,883
General and administrative	15,890	5,624	21,832	11,403
Restructuring	0	0	0	476
Total operating expenses	67,980	50,224	123,983	102,036
Loss from operations	(44,033)	(12,417)	(74,012)	(37,277)
Other income, net	272	430	25	48
Interest income, net	1,223	667	2,148	1,380
Loss before income taxes	(42,538)	(11,320)	(71,839)	(35,849)
Income tax benefit (expense)	(22)	370	(141)	(109)
Net loss	$ (42,560)	$ (10,950)	$ (71,980)	$ (35,958)
Basic net loss per common share (in dollars per share)	$ (1.03)	$ (0.27)	$ (1.75)	$ (0.89)
Diluted net loss per common share (in dollars per share)	$ (1.03)	$ (0.27)	$ (1.75)	$ (0.89)
Basic weighted average shares outstanding (in shares)	41,191	40,616	41,069	40,527
Diluted weighted average shares outstanding (in shares)	41,191	40,616	41,069	40,527
Product
Revenue:
Total revenue	$ 29,924	$ 83,379	$ 64,082	$ 127,833
Cost of revenue:
Total cost of revenue	23,424	65,274	49,526	99,319
Service
Revenue:
Total revenue	38,775	36,824	76,163	71,964
Cost of revenue:
Total cost of revenue	$ 21,328	$ 17,122	$ 40,748	$ 35,719

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net loss	$ (42,560)	$ (10,950)	$ (71,980)	$ (35,958)
Other comprehensive income (loss), net of tax:
Unrealized gain on available-for-sale investments	0	9	0	7
Foreign currency translation adjustments	(52)	(1,185)	156	(1,159)
Unrealized gain (loss) on cash flow hedges	(912)	2,306	(1,761)	1,074
Reclassification adjustments on cash flow hedges included in net loss	143	633	143	1,109
Other comprehensive income (loss)	(821)	1,763	(1,462)	1,031
Comprehensive loss	$ (43,381)	$ (9,187)	$ (73,442)	$ (34,927)

Condensed Consolidated Statem_3

Condensed Consolidated Statement of Shareholders' Equity Statement - USD ($) $ in Thousands	Total	Common stock and additional paid-in capital:	Accumulated other comprehensive income:	Accumulated deficit:
Balance at Dec. 31, 2017	$ 400,297	$ 633,408	$ 915	$ (234,026)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options		1,792
Restricted shares issued for compensation, net of forfeitures and taxes		(1,552)		(1,017)
Share-based compensation		6,134
Other comprehensive income (loss)	1,031		1,031
Reclassification of stranded tax effects resulting from adoption of ASU 2018-02			0	0
Net loss	(35,958)			(35,958)
Balance at Jun. 30, 2018	370,727	639,782	1,946	(271,001)
Balance at Mar. 31, 2018	378,878	637,783	183	(259,088)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options		255
Restricted shares issued for compensation, net of forfeitures and taxes		(1,448)		(963)
Share-based compensation		3,192
Other comprehensive income (loss)	1,763		1,763
Reclassification of stranded tax effects resulting from adoption of ASU 2018-02			0	0
Net loss	(10,950)			(10,950)
Balance at Jun. 30, 2018	370,727	639,782	1,946	(271,001)
Balance at Dec. 31, 2018	343,379	647,045	3,208	(306,874)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options		1,569
Restricted shares issued for compensation, net of forfeitures and taxes		(1,433)		(1,594)
Share-based compensation		7,767
Other comprehensive income (loss)	(1,462)		(1,462)
Reclassification of stranded tax effects resulting from adoption of ASU 2018-02	(212)		(212)	212
Net loss	(71,980)			(71,980)
Balance at Jun. 30, 2019	276,246	654,948	1,534	(380,236)
Balance at Mar. 31, 2019	317,672	651,441	2,355	(336,124)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options		740
Restricted shares issued for compensation, net of forfeitures and taxes		(1,334)		(1,552)
Share-based compensation		4,101
Other comprehensive income (loss)	(821)		(821)
Reclassification of stranded tax effects resulting from adoption of ASU 2018-02			0	0
Net loss	(42,560)			(42,560)
Balance at Jun. 30, 2019	$ 276,246	$ 654,948	$ 1,534	$ (380,236)

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)		Jun. 30, 2018USD ($)
Operating activities:
Net loss	$ (71,980)		$ (35,958)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	7,608		8,269
Share-based compensation expense	7,767		6,134
Other	577		(384)
Cash provided (used) due to changes in operating assets and liabilities:
Accounts and other receivables	11,407		46,484
Inventory	(9,561)		32,755
Prepaid expenses and other assets	7,429		6,056
Accounts payable	(2,628)		(40,264)
Accrued payroll and related expenses and other liabilities	(5,403)		3,777
Customer contract liabilities	(16,396)		(27,049)
Net cash used in operating activities	(71,180)		(180)
Investing activities:
Sales/maturities of available-for-sale investments	0		7,000
Cash received in strategic transaction	0		1,584
Purchases of property and equipment	(7,952)		(3,275)
Net cash provided by (used in) investing activities	(7,952)		5,309
Financing activities:
Purchase of employee restricted shares to fund related statutory tax withholding	(3,027)		(2,569)
Proceeds from exercises of stock options	1,569		1,792
Net cash used in financing activities	(1,458)		(777)
Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash	(22)		(185)
Net increase (decrease) in cash, cash equivalents and restricted cash	(80,612)		4,167
Cash, cash equivalents and restricted cash:
Beginning of period	245,764		140,320
End of period	165,152		144,487
Cash and cash equivalents	147,533
Restricted cash	3,772	[1]
Long-term restricted cash	13,847	[1]
Supplemental disclosure of cash flow information:
Cash paid for income taxes	308		401
Non-cash investing and financing activities:
Inventory transfers to fixed assets and service spares	$ 1,261		$ 5,503
[1]	Restricted cash primarily associated with certain letters of credit to secure customer prepayments and other customer related obligations.

Basis of Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Basis of Presentation	Note 1— Basis of Presentation In these notes, the Company and its wholly-owned subsidiaries are collectively referred to as the “Company.” In the opinion of management, the accompanying Condensed Consolidated Balance Sheets, Statements of Operations, Statements of Comprehensive Loss, Statements of Shareholders’ Equity and Statements of Cash Flows have been prepared in accordance with accounting principles generally accepted in the United States of America, or GAAP, for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and notes required by GAAP for complete financial statements. Management believes that all adjustments (consisting of normal recurring adjustments) considered necessary for fair presentation have been included. Interim results are not necessarily indicative of results for a full year. The information included in this quarterly report on Form 10-Q should be read in conjunction with “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and the financial statements and notes thereto included in the Company’s annual report on Form 10-K for the fiscal year ended December 31, 2018 . The Company’s revenue, results of operations and cash balances are likely to fluctuate significantly from quarter to quarter. These fluctuations are due to such factors as the high average sales prices and limited number of sales of the Company’s products, the timing of purchase orders and product deliveries, the revenue recognition accounting policy of generally not recognizing product revenue until customer acceptance and other contractual provisions have been fulfilled and the timing of payments for product sales, maintenance services, government research and development funding and purchases of inventory. Given the nature of the Company’s business, its revenue, receivables and other related accounts are likely to be concentrated among a relatively small number of customers. Pending Merger with Hewlett Packard Enterprise Company On May 16, 2019, the Company entered into an agreement and plan of merger, (the “Merger Agreement”), with Hewlett Packard Enterprise Company, a Delaware corporation (“HPE”), and Canopy Merger Sub, Inc., a Washington corporation and a wholly owned subsidiary of HPE (“Merger Sub”). Pursuant to the terms of the Merger Agreement, and subject to the conditions specified in the Merger Agreement, Merger Sub will merge with and into the Company, and the Company will become a wholly owned subsidiary of HPE (such transaction, the “Merger”). If the Merger is completed, the Company’s shareholders will be entitled to receive $35.00 in cash, without interest and less any withholding taxes required by applicable law, for each share of the Company’s common stock owned by them as of immediately prior to the effective time of the Merger, except with respect to Company shareholders who have properly demanded statutory dissenters’ rights with respect to the Merger. The consummation of the Merger is subject to certain conditions, including (i) approval of the Merger Agreement by holders of not less than a majority of the outstanding shares of the Company’s common stock; (ii) the absence of any temporary restraining order, preliminary or permanent injunction, or any law or other judgment enacted, issued, promulgated, enforced or entered into by any governmental authority of competent jurisdiction that is then in effect and has the effect of making the Merger illegal or otherwise prevents or prohibits the consummation of the Merger; (iii) the expiration or termination of the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended (the “HSR Act”), as well as all other required approvals, consents or clearances as may be required under the competition, merger control, antitrust or similar law of certain non-U.S. jurisdictions; (iv) the accuracy of the Company’s, HPE’s and Merger Sub’s respective representations and warranties, subject to specified materiality qualifications; (v) the absence of a Material Adverse Effect (as defined in the Merger Agreement); and (vi) other customary conditions. The consummation of the Merger is not subject to a financing condition and the Company expects HPE to finance the payment of the applicable consideration in the Merger with cash on hand, existing financing facilities and/or other debt financing. The special meeting of the Company’s shareholders to vote on the approval of the Merger Agreement is scheduled to be held on August 27, 2019. The Company anticipates that the closing of the transactions contemplated by the Merger Agreement is expected to occur in the next 3 ½ to 6 ½ months, subject to the Company’s shareholders approving the Merger Agreement at the special meeting, all regulatory approvals being received and all other conditions set forth in the Merger Agreement being either satisfied or waived. On June 14, 2019, the Company and HPE filed their respective notification and report forms pursuant to the HSR Act with the Antitrust Division of the U.S. Department of Justice and the Federal Trade Commission. On July 15, 2019, HPE voluntarily withdrew its notification and report form for administrative reasons and refiled it on July 17, 2019. The Company expects that the waiting period under the HSR Act will, absent a second request, expire or be terminated on or before August 16, 2019. For additional information related to the Merger and the Merger Agreement, please refer to the Company’s Current Report on Form 8-K filed with the SEC on May 16, 2019 and the Definitive Proxy Statement on Schedule 14A filed with the Securities and Exchange Commission on June 25, 2019. Upon completion of the Merger, shares of the Company’s common stock will cease trading on The Nasdaq Global Select Market. The Company recorded transaction-related costs of $7.6 million principally for legal and investment banker fees associated with the pending Merger, during the three months ended June 30, 2019. These costs are recorded in general and administrative expenses included in the condensed consolidated statement of operations for the three months ended June 30, 2019. Retention bonuses of approximately $17 million have also been granted to employees. Payment of these bonuses is contingent on completion of the transaction and continued service of the employees through the closing of the Merger. Additional transaction-related costs are expected to be incurred through the closing of the Merger. The Company may be required to pay HPE a $46.0 million termination fee if the Merger Agreement is terminated in accordance with certain circumstances provided therein. Principles of Consolidation The accompanying condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All material intercompany accounts and transactions have been eliminated. Use of Estimates The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the amounts reported in the Company’s condensed consolidated financial statements and accompanying notes. Actual results could differ materially from those estimates. New Accounting Pronouncements In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update No. 2016-02, Leases: Topic 842 (ASU 2016-02), which replaces existing lease guidance. The new standard is intended to provide enhanced transparency and comparability by requiring lessees to record right-of-use (“ROU”) assets and corresponding lease liabilities on the balance sheet. The new standard initially required application with a modified retrospective approach to each prior reporting period presented with various optional practical expedients. In July 2018, this requirement was amended with the issuance of Accounting Standards Update No. 2018-11, Leases: Topic 842: Targeted Improvements (ASU 2018-11), which permits an additional (and optional) transition method to adopt the new leases standard. The Company adopted ASU 2016-02 and related ASUs, collectively ASC 842, on January 1, 2019 using the optional transition method. Consequently, periods before January 1, 2019 will continue to be reported in accordance with the prior accounting guidance, ASC 840, Leases. The Company elected the package of practical expedients, which permits the Company to retain prior conclusions about lease identification, lease classification and initial direct costs for leases that commenced before January 1, 2019. The new standard also provides practical expedients for an entity’s ongoing accounting. The Company elected the short-term lease recognition exemption for all leases that qualify. The Company also elected the practical expedient to combine lease and non-lease components for all of its leases other than net lease real estate leases. Adoption of ASC 842 resulted in the recording of ROU assets and lease liabilities of $34.4 million and $46.6 million , respectively, as of January 1, 2019. The difference between ROU assets and lease liabilities relates to liabilities of $12.2 million for deferred rent and lease incentives liabilities that were included on the Company’s Condensed Consolidated Balance Sheets prior to adoption of ASC 842. These amounts were eliminated at the time of adoption and are included in the lease liabilities number above. Adoption of ASC 842 did not have a material impact on the Company’s consolidated net earnings and had no impact on cash flows. In August 2017, FASB issued Accounting Standards Update No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities (ASU 2017-12). The new standard simplifies and expands the eligible hedging strategies for financial and nonfinancial risks. It also enhances the transparency of how hedging results are presented and disclosed. Further, the new standard provides partial relief on the timing of certain aspects of hedge documentation and eliminates the requirement to recognize hedge ineffectiveness separately in earnings. The Company adopted ASU 2017-12 on January 1, 2019. Adoption of ASU 2017-12 did not have a material impact on the Company’s consolidated financial statements. Upon adoption of ASU 2017-12, the Company revised its accounting policy for foreign currency derivatives from the policy included in the Notes to Consolidated Financial Statements in its annual report on Form 10-K for year ended December 31, 2018. The revised accounting policy for foreign currency derivatives is included below. In February 2018, FASB issued Accounting Standards Update No. 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income (ASU 2018-02). The new standard amends ASC 220 to allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act and requires entities to provide certain disclosures regarding stranded tax effects. The Company adopted ASU 2018-02 on January 1, 2019. At the time of adoption, the Company reclassified $0.2 million of stranded tax effects resulting from the Tax Cuts and Jobs Act from accumulated other comprehensive income to accumulated deficit. Adoption of ASU 2018-02 did not have a material impact on the Company’s consolidated financial statements. In August 2018, FASB issued Accounting Standards Update No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement (ASU 2018-13). The new standard makes various modifications to the disclosure requirements on fair value measurement in Topic 820. The Company adopted ASU 2018-13 on January 1, 2019. Adoption of ASU 2018-13 did not have a material impact on the Company’s consolidated financial statements. Revised Accounting Policies Foreign Currency Derivatives The Company uses foreign currency exchange contracts to manage certain foreign currency exposures. Foreign currency exchange contracts are cash flow hedges of the Company’s foreign currency exposures on certain revenue contracts and are recorded at the contract’s fair value. Most of the Company’s foreign currency exchange contracts are designated as cash flow hedges for the purposes of hedge accounting treatment and any gains or losses on the foreign currency exchange contract is initially reported in “Accumulated other comprehensive income,” a component of shareholders’ equity, with a corresponding asset or liability recorded based on the fair value of the foreign currency exchange contract. When the hedged transaction is recognized, any unrecognized gains or losses on the hedged transaction are reclassified into results of operations in the same period and presented in the same income statement line item as the earnings effect of the hedged item. The Company excludes the changes in fair value of the contract related to forward points from the assessment of hedge effectiveness and the gains and losses associated with the excluded component are presented in the same line of the income statement for the hedged item. For hedging relationships executed before the date of adoption of ASU 2017-12, the gains and losses associated with the excluded components are recognized currently in earnings. The amortization approach is used for hedging relationships executed after the date of adoption of ASU 2017-02. Cash flows from foreign currency exchange contracts accounted for as cash flow hedges are classified in the same category as the cash flows from the items being hedged. The Company typically dedesignates its cash flow hedges for the purposes of hedge accounting treatment when the receivable related to the hedged cash flow is recorded. Unrealized gains or losses related to foreign currency exchange contracts that are not designated as cash flow hedges for the purposes of hedge accounting treatment are recorded in other income (expense) in the Condensed Consolidated Statements of Operations and are generally offset by foreign currency adjustments on related receivables. The Company does not use derivative financial instruments for speculative purposes.

Revenue Recognition

Revenue Recognition	6 Months Ended
	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Revenue Recognition	Note 2— Revenue Recognition The Company’s performance obligations are satisfied over time as work is performed or at a point in time. The majority of the Company’s revenue is recognized at a point in time when products are accepted, installed or delivered. Most of the Company’s revenue is derived from long-term contracts that can span several years. Revenue is recognized when performance obligations under the terms of a contract with the customer are satisfied; generally, this occurs with the transfer of control of the Company’s systems or services. In general, this does not occur until the products have been shipped or services provided to the customer, risk of loss has transferred to the customer, and, where applicable, a customer acceptance has been obtained. Revenue is measured as the amount of consideration the Company expects to receive in exchange for transferring goods or providing services. Sales, value add, and other taxes that the Company collects concurrent with revenue-producing activities are excluded from revenue. Incidental items that are immaterial in the context of the contract are recognized as expense. To determine the proper revenue recognition method for contracts, the Company evaluates whether two or more contracts should be combined and accounted for as one single contract and whether the combined or single contract should be accounted for as more than one performance obligation. Contracts are often modified to account for changes in contract specifications and requirements. To determine the proper revenue recognition method for contract modifications, the Company evaluates whether the contract modification should be accounted for as a separate contract, part of an existing contract, or termination of an existing contract and the creation of a new contract. This evaluation requires significant judgment and the decision to combine a group of contracts or separate the combined or single contract into multiple performance obligations could change the amount of revenue and profit recorded in a given period. For contracts with multiple performance obligations, the Company allocates the contract’s transaction price to each performance obligation using the Company’s estimate of the standalone selling price of each distinct good or service in the contract. The Company determines the transaction price by reviewing the established contractual terms and other relevant information. Contracts can include penalty clauses and contracts with government customers may not be fully funded, both of which represent variable consideration. Generally, the Company includes both the funded and unfunded portions of a contract with a government customer in the transaction price, as most often it is deemed the contract will become fully funded. The Company also assesses the likelihood of certain penalties that would result in contract price reductions and, if deemed probable, the transaction price is adjusted. The majority of the Company’s contracts include multiple promised goods and services, which are assessed at contract inception. Each distinct good or service is identified as a performance obligation, which may be an individual good or service or a bundle of goods or services. In order to determine whether the promises are distinct, the Company assesses the use of its products and services by its customers to determine whether the customer can benefit from the good or service on its own or from other readily available resources, and whether the promised transfer of goods or services is separately identifiable from other promises in the contract. The majority of the Company’s revenues are from product solutions which include supercomputers, storage, and data analytics systems, each of which are usually separate performance obligations. Revenue is recognized when obligations under the terms of a contract with a customer are satisfied. Product revenue is typically recognized upon customer acceptance, or upon installation or delivery if formal acceptance is not required. Service revenue is typically recognized over time and consists mainly of system maintenance, analyst services, and engineering services, each of which are usually separate performance obligations. System maintenance commences upon customer acceptance or installation, depending on the contract terms, and revenue is recognized ratably over the remaining term of the maintenance contract. On-site analysts provide specialized services to customers, the revenue for which is recognized ratably over the contract period. Service revenue is recognized on a straight-line basis over the service period as the services are available continuously to the customer. Revenue from engineering services can be recognized as services are performed or as milestones are achieved, depending on the terms of the contract and nature of services performed. If, in a contract, the customer has an option to acquire additional goods or services, that option gives rise to a performance obligation if the option provides a material right to the customer that it would not receive without entering into that contract. Revenue from purchase options can be recognized as those future goods or services are transferred or when the option expires. The Company performs an assessment to determine whether a significant financing component is present in a contract. If a contract is determined to include a significant financing component, the interest rate used in the calculation is based on the prevailing interest rates at contract inception and the entity’s creditworthiness. When the period between providing a good or service to the customer is expected to be less than one year from payment, the Company applies the practical expedient and does not adjust the consideration for the effects of a significant financing component. Occasionally, the Company’s contracts include noncash consideration. This typically consists of returned parts when a system is upgraded or de-installed. Noncash consideration is measured at contract inception at estimated fair value. The total transaction price is allocated to each performance obligation identified in the contract based on its relative standalone selling price. The Company does not have directly observable standalone selling prices for the majority of its performance obligations due to a relatively small number of customer contracts that differ in system size and contract terms which can be due to infrequently selling each performance obligation separately, not pricing products within a narrow range, or only having a limited sales history, such as in the case of certain advanced and emerging technologies. When a directly observable standalone selling price is not available, the Company estimates the standalone selling price. In determining the estimated standalone selling price, the Company uses the cost to provide the product or service plus a margin, or considers other factors. When using cost plus a margin, the Company considers the total cost of the product or service, including customer-specific and geographic factors as appropriate. The Company also considers the historical margins of the product or service on previous contracts and several other factors including any changes to pricing methodologies, competitiveness of products and services, and cost drivers that would cause future margins to differ from historical margins. The Company sometimes offers discounts to its customers. As these discounts are offered on bundles of goods and services, the discounts are applied to all performance obligations in the contract on a pro-rata basis. The following table provides information about contract receivables, contract assets, and contract liabilities from contracts with customers (in thousands) and includes both short-term and long-term portions: June 30, December 31, 2018 Change Contract receivables $ 67,214 $ 78,634 $ (11,420 ) Contract assets 5,793 6,404 (611 ) Contract liabilities 77,430 94,004 (16,574 ) Contract receivables consist of amounts billed to customers and include the Company's investment in a sales type lease, a portion of which is due beyond one year. Generally, billing occurs subsequent to product revenue recognition and payment is expected within 30 days. Contract assets primarily relate to the Company's rights to consideration for work completed but not billed where right to payment is not just subject to the passage of time. Contract assets become contract receivables when the rights become unconditional. The Company sometimes receives advances or deposits from customers before revenue is recognized, resulting in customer contract liabilities (formerly deferred revenue). These assets and liabilities are reported on the Condensed Consolidated Balance Sheet on a contract-by-contract basis at the end of each reporting period. The Company’s payment terms vary from contract to contract. Contracts may require payment before, at or after the Company’s performance obligations have been satisfied. For the six month period ended June 30, 2019 , the Company recognized $35.1 million in revenues from the contract liability balance at the beginning of the period. The Company’s incremental direct costs of obtaining a contract come primarily from sales commissions, a portion of which are payable upon contract signing. These commissions are generally capitalized upon payment and expensed at the time of revenue recognition. These deferred commissions are included in prepaid expenses in the Condensed Consolidated Balance Sheet. As of June 30, 2019 and December 31, 2018 , the Company had $4.2 million and $2.0 million , respectively, of deferred commissions. For the three and six months ended June 30, 2019 , the Company recognized $0.8 million and $1.8 million , respectively, in commissions expense. For the three and six months ended June 30, 2018 , the Company recognized $1.5 million and $2.6 million , respectively, in commissions expense. The Company’s remaining performance obligations reflect the deliverables within contracts with customers that will have revenue recognized in a future period (this may also be referred to as backlog). Due to the nature of the Company’s business and the size of individual transactions, forecasting the timing and total amount of revenue recognition is subject to significant uncertainties. As of June 30, 2019 , the Company has an aggregate of $639 million in remaining performance obligations stemming from a mixture of system contracts with their related service obligations and other service obligations. Included in this balance are $0.2 million in losses resulting from hedged foreign currency transactions, which offset the related increase in revenue from currency fluctuations. These losses will be reclassified from accumulated other comprehensive income to revenue in the period the related transactions are recognized as revenue. These obligations are anticipated to be recognized as revenue over approximately the next six years . The Company estimates that about 60% of these obligations are expected to be recognized as revenue in the next 18 months , with the remainder thereafter. The Company’s previously announced contract to build the Frontier exascale system for the Oak Ridge National Laboratory, which is valued in excess of $500 million , is not included in the amounts above as it is subject to a Go/No-Go provision and is therefore not considered a performance obligation. The Company’s revenue is presented on a disaggregated basis in “Note 13-Segment Information” in the Notes to Condensed Consolidated Financial Statements in this quarterly report on Form 10-Q.

Fair Value Measurement

Fair Value Measurement	6 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurement	Note 3— Fair Value Measurement Based on the observability of the inputs used in the valuation techniques used to determine the fair value of certain financial assets and liabilities, the Company is required to provide the following information according to the fair value hierarchy. The fair value hierarchy ranks the quality and reliability of the information used to determine fair values. In general, fair values determined by Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities. Fair values determined by Level 2 inputs utilize observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the related assets or liabilities. Fair values determined by Level 3 inputs are unobservable data points for the asset or liability, and include situations where there is little, if any, market activity for the asset or liability. The following table presents information about the Company’s financial assets that have been measured at fair value as of June 30, 2019 , and indicates the level within the fair value hierarchy of the valuation inputs utilized to determine such fair value (in thousands): Description Fair Value Quoted Prices in Active Markets (Level 1) Significant Other Observable Inputs (Level 2) Assets: Cash, cash equivalents and restricted cash $ 165,152 $ 165,152 $ — Foreign currency exchange contracts (1) 2,400 — 2,400 Assets measured at fair value at June 30, 2019 $ 167,552 $ 165,152 $ 2,400 Liabilities: Foreign currency exchange contracts (2) 111 $ — 111 Liabilities measured at fair value at June 30, 2019 $ 111 $ — $ 111 (1) Included in “Prepaid expenses and other current assets” and “Other non-current assets” on the Company’s Condensed Consolidated Balance Sheets. (2) Included in “Other accrued liabilities” and “Other non-current liabilities” on the Company’s Consolidated Balance Sheets. Foreign Currency Derivatives The Company may enter into foreign currency derivatives to hedge future cash receipts on certain sales transactions that are payable in foreign currencies. As of June 30, 2019 and December 31, 2018 , the Company had outstanding foreign currency exchange contracts that were designated and accounted for as cash flow hedges of anticipated future cash receipts on sales contracts payable in foreign currencies. The outstanding notional amounts were approximately (in millions): June 30, December 31, 2018 Canadian Dollars (CAD) 6.5 54.4 Japanese Yen (JPY) 711.5 — Singapore Dollars (SGD) 1.8 — The Company had hedged foreign currency exposure related to these designated cash flow hedges of approximately $12.9 million as of June 30, 2019 and $41.6 million as of December 31, 2018 . As of June 30, 2019 and December 31, 2018 , the Company had outstanding foreign currency exchange contracts that had been dedesignated for the purposes of hedge accounting treatment. The Company dedesignates cash flow hedges when the receivable related to the hedged cash flow is recorded. The outstanding notional amounts were approximately (in millions): June 30, December 31, 2018 British Pounds (GBP) 13.1 24.8 Canadian Dollars (CAD) 47.9 — Korean Won (KRW) — 4,446.5 Singapore Dollars (SGD) — 2.0 The foreign currency exposure related to these contracts was approximately $55.8 million as of June 30, 2019 and $40.6 million as of December 31, 2018 . Unrealized gains or losses related to these dedesignated contracts are recorded in other expense in the Condensed Consolidated Statements of Operations and are generally offset by foreign currency adjustments on related receivables. These foreign currency exchange contracts are considered to be economic hedges. Cash receipts associated with the foreign currency exchange contracts are expected to be received from 2019 through 2022, during which time the revenue on the associated sales contracts is expected to be recognized, or in the case of receivables denominated in a foreign currency, the receivables balances will be collected. Any gain or loss on hedged foreign currency will be recognized at the time of customer acceptance, or in the case of receivables denominated in a foreign currency, over the period during which hedged receivables denominated in a foreign currency are outstanding. Fair values of derivative instruments designated as cash flow hedges (in thousands): Balance Sheet Location Fair Value Fair Value Prepaid expenses and other current assets $ — $ 1,296 Other non-current assets — 137 Other accrued liabilities (62 ) — Other non-current liabilities (6 ) — Total fair value of derivative instruments designated as cash flow hedges $ (68 ) $ 1,433 Fair values of derivative instruments not designated as cash flow hedges (in thousands): Balance Sheet Location Fair Value Fair Value Prepaid expenses and other current assets $ 1,941 $ 1,894 Other non-current assets 459 1,242 Accrued and other liabilities (43 ) (63 ) Total fair value of derivative instruments not designated as cash flow hedges $ 2,357 $ 3,073 The following table shows the impact on product revenue of foreign currency exchange contracts that were designated as cash flow hedges (in thousands): Three Months Ended Six Months Ended 2019 2018 2019 2018 Total amounts of product revenue presented in the condensed consolidated statement of operations in which the effects of cash flow hedges are recorded $ 29,924 $ 83,379 $ 64,082 127,833 Amount of gain (loss) recognized in other comprehensive income included in the assessment of effectiveness (171 ) 2,939 (1,020 ) 2,183 Amount of loss reclassified from accumulated other comprehensive income to product revenue (143 ) (633 ) (143 ) (1,109 ) Amount excluded from effectiveness testing recognized as an increase in product revenue based on changes in fair value 63 — 119 — Amount excluded from effectiveness testing recognized in earnings based on an amortization approach 6 — 6 — The following table shows the impact on other expense of losses on foreign currency exchange contracts that were not designated as cash flow hedges. These amounts increased other income for all periods presented (in thousands): Three Months Ended Six Months Ended 2019 2018 2019 2018 Other income, net $ 442 $ 3,501 $ 16 $ 1,590

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	6 Months Ended
	Jun. 30, 2019
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income	Note 4— Accumulated Other Comprehensive Income The following table shows the impact on product revenue of reclassification adjustments from accumulated other comprehensive income resulting from hedged foreign currency transactions recorded by the Company for the three and six months ended June 30, 2019 and 2018 (in thousands). The reclassification adjustments decreased product revenue for the three and six months ended June 30, 2019 and 2018. Three Months Ended Six Months Ended 2019 2018 2019 2018 Gross of tax reclassifications $ (143 ) $ (633 ) $ (143 ) $ (1,109 ) Net of tax reclassifications $ (143 ) $ (633 ) $ (143 ) $ (1,109 ) The following tables show the changes in accumulated other comprehensive income by component for the three and six months ended June 30, 2019 and 2018 (in thousands): Three Months Ended June 30, 2019 Foreign Currency Translation Adjustments Unrealized Gain on Cash Flow Hedges Accumulated Other Comprehensive Income Beginning balance $ 1,024 $ 1,331 $ 2,355 Current-period change, net of tax (52 ) (769 ) (821 ) Ending balance $ 972 $ 562 $ 1,534 Income tax expense (benefit) associated with current-period change $ — $ — $ — Three Months Ended June 30, 2018 Unrealized Loss on Investments Foreign Currency Translation Adjustments Unrealized Gain (Loss) on Cash Flow Hedges Accumulated Other Comprehensive Income Beginning balance $ (9 ) $ 1,637 $ (1,445 ) 183 Current-period change, net of tax 9 (1,185 ) 2,939 1,763 Ending balance $ — $ 452 $ 1,494 $ 1,946 Income tax expense (benefit) associated with current-period change $ — $ — $ — $ — Six Months Ended June 30, 2019 Foreign Currency Translation Adjustments Unrealized Gain on Cash Flow Hedges Accumulated Other Comprehensive Income Beginning balance $ 606 $ 2,602 $ 3,208 Current-period change, net of tax 156 (1,618 ) (1,462 ) Reclassification of stranded tax effects resulting from adoption of ASU 2018-02 210 (422 ) (212 ) Ending balance $ 972 $ 562 $ 1,534 Income tax expense (benefit) associated with current-period change $ — $ — $ — Six Months Ended June 30, 2018 Unrealized Loss on Investments Foreign Currency Translation Adjustments Unrealized Gain (Loss) on Cash Flow Hedges Accumulated Other Comprehensive Income Beginning balance $ (7 ) $ 1,611 $ (689 ) $ 915 Current-period change, net of tax 7 (1,159 ) 2,183 1,031 Ending balance $ — $ 452 $ 1,494 $ 1,946 Income tax expense (benefit) associated with current-period change $ — $ — $ — $ —

Loss Per Share (EPS)

Loss Per Share (EPS)	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Loss Per Share (EPS)	Note 5— Loss Per Share ("EPS") Basic EPS is computed by dividing net loss available to common shareholders by the weighted average number of common shares, excluding unvested restricted stock, outstanding during the period. Diluted EPS is computed by dividing net loss available to common shareholders by the weighted average number of common and potential common shares outstanding during the period, which includes the additional dilution related to conversion of stock options, unvested restricted stock and unvested restricted stock units as computed under the treasury stock method. For the three and six months ended June 30, 2019 and 2018 , outstanding stock options, unvested restricted stock and unvested restricted stock units were antidilutive because of the net losses and, as such, their effect has not been included in the calculation of diluted EPS. For the three and six months ended June 30, 2019 , potential gross common shares of 3.1 million , were antidilutive and not included in computing diluted EPS. For the three and six months ended June 30, 2018 , potential gross common shares of and 3.0 million , were antidilutive and not included in computing diluted EPS. An additional 0.5 million performance vesting restricted stock and performance vesting restricted stock units were excluded from the computation of potential common shares for each of the three and six months ended June 30, 2019 and 2018 , because the conditions for vesting had not been met as of the balance sheet date.

Accounts and Other Receivables,

Accounts and Other Receivables, Net	6 Months Ended
	Jun. 30, 2019
Receivables [Abstract]
Accounts and Other Receivables, Net	Note 6— Accounts and Other Receivables, Net Net accounts and other receivables consisted of the following (in thousands): June 30, December 31, 2018 Trade accounts receivable $ 49,285 $ 63,414 Current contract assets 4,003 4,391 Advance billings 2,924 1,832 Short-term investment in sales-type lease 12,607 12,462 Other receivables 7,699 6,708 76,518 88,807 Allowance for doubtful accounts (17 ) (988 ) Accounts and other receivables, net $ 76,501 $ 87,819 Contract assets represent amounts where the Company has recognized revenue in advance of the contractual billing terms. Advance billings represent billings made based on contractual terms for which revenue has not been recognized. As of June 30, 2019 and December 31, 2018 , accounts receivable included $12.0 million and $25.6 million , respectively, that resulted from sales to the U.S. government and system acquisitions primarily funded by the U.S. government (“U.S. Government”). Of these amounts, $2.4 million and $1.5 million were unbilled and included in contract assets as of June 30, 2019 and December 31, 2018 , respectively, based upon contractual billing arrangements with these customers. As of June 30, 2019 , two non-U.S. Government customer accounted for 35% of total accounts and other receivables. As of December 31, 2018 , two non-U.S. Government customers accounted for 28% of total accounts and other receivables.

Leases

Leases	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Leases	Note 7— Leases The Company leases certain equipment and facilities used in operations under operating leases in its normal course of business. The Company’s leases have remaining lease terms of 1 to 11 years , some of which include options to extend the leases for up to 5 years , and some of which include options to terminate the leases within 1 to 5 years . The exercise of these options is at the Company’s sole discretion. The Company has not included these options to extend or terminate in its calculation of right-of-use assets or lease liabilities as it is not reasonably certain to exercise these options. The Company’s lease agreements do not contain any residual value guarantees, material restrictions or covenants. Operating lease cost for the three and six months ended June 30, 2019 was $1.9 million and $3.7 million , respectively. The Company has elected the practical expedient for short-term leases. Operating lease cost for the Company’s short-term leases for the three and six months ended June 30, 2019 was immaterial. Supplemental cash flow information related to operating leases for the three and six months ended June 30, 2019 was as follows (in thousands): Three Months Ended Six Months Ended 2019 2019 Cash paid for amounts included in the measurement of operating lease liabilities: $ 2,081 $ 4,119 Operating right-of-use assets obtained in exchange for lease obligations: $ 116 $ 465 Supplemental balance sheet information related to operating leases as of June 30, 2019 was as follows (in thousands, except lease term and discount rate): June 30, Operating lease right-of-use assets $ 32,656 Current portion of operating lease liabilities, included in accrued and other liabilities $ 4,664 Long-term operating lease liabilities 39,845 Total operating lease liabilities $ 44,509 Weighted average remaining lease term (in years): 8.72 Weighted average discount rate (1): 6.76 % (1) Where the Company could not determine the rate inherent in the lease, its incremental borrowing rate was calculated using LIBOR plus a spread for similar companies. As of June 30, 2019 , maturities of operating lease liabilities were as follows (in thousands): 2019 (less than 1 year) $ 4,143 2020 8,184 2021 7,979 2022 7,628 2023 6,731 Thereafter 30,046 Total lease payments 64,711 Less: interest (20,202 ) Present value of lease liabilities $ 44,509 Sales-type Lease The Company has a sales-type lease with one non-U.S. Government customer, under which it receives quarterly payments over the term of the lease, which expires in September 2020. The lease is denominated in British Pounds and the Company has entered into certain foreign currency exchange contracts that act as an economic hedge for the foreign currency exposure associated with this arrangement. Interest income for the sales-type lease for the three and six months ended June 30, 2019 was $0.1 million and $0.3 million , respectively. The following table shows the components of the net investment in the sales-type lease as of June 30, 2019 and December 31, 2018 (in thousands): June 30, December 31, 2018 Total minimum lease payments to be received $ 18,169 $ 25,543 Less: executory costs (2,123 ) (2,985 ) Net minimum lease payments receivable 16,046 22,558 Less: unearned income (242 ) (510 ) Net investment in sales-type lease 15,804 22,048 Less: long-term investment in sales-type lease included in other non-current assets (3,197 ) (9,586 ) Investment in sales-type lease included in accounts and other receivables $ 12,607 $ 12,462 As of June 30, 2019 , minimum lease payments related to our sales-type lease for each of the succeeding two fiscal years are as follows (in thousands): 2019 (less than 1 year) $ 7,274 2020 10,895 Total minimum lease payments to be received $ 18,169
Leases	Note 7— Leases The Company leases certain equipment and facilities used in operations under operating leases in its normal course of business. The Company’s leases have remaining lease terms of 1 to 11 years , some of which include options to extend the leases for up to 5 years , and some of which include options to terminate the leases within 1 to 5 years . The exercise of these options is at the Company’s sole discretion. The Company has not included these options to extend or terminate in its calculation of right-of-use assets or lease liabilities as it is not reasonably certain to exercise these options. The Company’s lease agreements do not contain any residual value guarantees, material restrictions or covenants. Operating lease cost for the three and six months ended June 30, 2019 was $1.9 million and $3.7 million , respectively. The Company has elected the practical expedient for short-term leases. Operating lease cost for the Company’s short-term leases for the three and six months ended June 30, 2019 was immaterial. Supplemental cash flow information related to operating leases for the three and six months ended June 30, 2019 was as follows (in thousands): Three Months Ended Six Months Ended 2019 2019 Cash paid for amounts included in the measurement of operating lease liabilities: $ 2,081 $ 4,119 Operating right-of-use assets obtained in exchange for lease obligations: $ 116 $ 465 Supplemental balance sheet information related to operating leases as of June 30, 2019 was as follows (in thousands, except lease term and discount rate): June 30, Operating lease right-of-use assets $ 32,656 Current portion of operating lease liabilities, included in accrued and other liabilities $ 4,664 Long-term operating lease liabilities 39,845 Total operating lease liabilities $ 44,509 Weighted average remaining lease term (in years): 8.72 Weighted average discount rate (1): 6.76 % (1) Where the Company could not determine the rate inherent in the lease, its incremental borrowing rate was calculated using LIBOR plus a spread for similar companies. As of June 30, 2019 , maturities of operating lease liabilities were as follows (in thousands): 2019 (less than 1 year) $ 4,143 2020 8,184 2021 7,979 2022 7,628 2023 6,731 Thereafter 30,046 Total lease payments 64,711 Less: interest (20,202 ) Present value of lease liabilities $ 44,509 Sales-type Lease The Company has a sales-type lease with one non-U.S. Government customer, under which it receives quarterly payments over the term of the lease, which expires in September 2020. The lease is denominated in British Pounds and the Company has entered into certain foreign currency exchange contracts that act as an economic hedge for the foreign currency exposure associated with this arrangement. Interest income for the sales-type lease for the three and six months ended June 30, 2019 was $0.1 million and $0.3 million , respectively. The following table shows the components of the net investment in the sales-type lease as of June 30, 2019 and December 31, 2018 (in thousands): June 30, December 31, 2018 Total minimum lease payments to be received $ 18,169 $ 25,543 Less: executory costs (2,123 ) (2,985 ) Net minimum lease payments receivable 16,046 22,558 Less: unearned income (242 ) (510 ) Net investment in sales-type lease 15,804 22,048 Less: long-term investment in sales-type lease included in other non-current assets (3,197 ) (9,586 ) Investment in sales-type lease included in accounts and other receivables $ 12,607 $ 12,462 As of June 30, 2019 , minimum lease payments related to our sales-type lease for each of the succeeding two fiscal years are as follows (in thousands): 2019 (less than 1 year) $ 7,274 2020 10,895 Total minimum lease payments to be received $ 18,169

Inventory - (Notes)

Inventory - (Notes)	6 Months Ended
	Jun. 30, 2019
Inventory Disclosure [Abstract]
Inventory	Note 8— Inventory Inventory consisted of the following (in thousands): June 30, December 31, 2018 Components and subassemblies $ 34,165 $ 42,390 Work in process 12,294 17,429 Finished goods 41,576 20,541 Total $ 88,035 $ 80,360 Finished goods inventory of $41.6 million and $16.0 million was located at customer sites pending acceptance as of June 30, 2019 and December 31, 2018 , respectively. At June 30, 2019 , the U.S. Government accounted for $12.7 million of finished goods inventory and one non-U.S. Government customer accounted for $27.0 million of finished goods inventory. At December 31, 2018 , the U.S. Government accounted for $13.9 million of finished goods inventory. The Company wrote off $0.6 million and $3.8 million of excess and obsolete inventory during the three and six months ended June 30, 2019 . The Company did not write off any inventory during the three and six months ended June 30, 2018 .

Customer Contract Liabilities

Customer Contract Liabilities	6 Months Ended
	Jun. 30, 2019
Contract with Customer, Liability [Abstract]
Contract Liabilities	Note 9— Customer Contract Liabilities Liabilities from contracts with customers consisted of the following (in thousands): June 30, December 31, 2018 Contract liability - product $ 5,916 $ 5,667 Contract liability - service 71,514 88,337 Total contract liabilities 77,430 94,004 Less: long-term contract liabilities (23,077 ) (32,021 ) Current contract liabilities $ 54,353 $ 61,983 As of June 30, 2019 and December 31, 2018 , the U.S. Government accounted for $22.3 million and $29.8 million , respectively, of total customer contract liabilities. As of June 30, 2019 and December 31, 2018 , no non-U.S. government customers accounted for more than 10% of total customer contract liabilities.

Contingencies

Contingencies	6 Months Ended
	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Contingencies	Note 10— Contingencies The Company is subject to patent lawsuits brought by Raytheon Company (“Raytheon”). A first suit was brought by Raytheon on September 25, 2015 in the Eastern District of Texas (Civil Action No. 2:15-cv-1554) asserting infringement of four patents owned by Raytheon (“First Action”). Two of the originally asserted patents relate to computer hardware alleged to be encompassed by Cray’s current and past products (the “Hardware Patents”), and the two remaining asserted patents relate to features alleged to be performed by certain third-party software that Cray optionally includes as part of its product offerings (the “Software Patents”). A second suit was brought by Raytheon on April 22, 2016 in the Eastern District of Texas (Civil Action No. 2:16-cv-423) asserting infringement of five patents owned by Raytheon (“Second Action”. In the Second Action, all five asserted patents relate to features alleged to be performed by certain third-party software that Cray optionally includes as part of its product offerings. On September 21, 2017, the United States Court of Appeals for the Federal Circuit granted Cray’s petition for writ of mandamus and overturned the trial court’s determination that venue in the First Action was proper in the Eastern District of Texas. Accordingly on April 5, 2018, the trial court ordered that the First Action should be transferred to the Western District of Wisconsin, as had been requested by Cray, which was effective on April 30, 2018 (Civil Action No. 3:18-cv-00318-wmc). After transfer, Raytheon indicated its desire to withdraw its claims for infringement of the Hardware Patents. The Wisconsin court, upon joint motion of the parties, dismissed with prejudice the counts related to the Hardware Patents, and Raytheon has served on the Company and filed with the court covenants not to sue for infringement of the Hardware Patents. The Texas court, upon joint motion of the parties, transferred the Second Action to the Northern District of California (Civil Action No. 3:18-cv-03388-RS). Per joint motion of the parties, the California court has stayed the Second Action pending resolution of the First Action. In the First Action, the Wisconsin court held a summary judgment hearing on January 10, 2019. Respecting Cray’s contentions that Raytheon’s claims of infringement of the Software Patents fail as a matter of law, on April 15, 2019, the Wisconsin court, by opinion and order, granted Cray’s motion for summary judgment and directed judgment in favor of Cray regarding Raytheon’s claims of infringement of the Software Patents. On May 15, 2019, Cray filed a motion seeking attorneys fees under 35 U.S.C. § 285 which provides that the Court in “exceptional cases may award reasonable attorney fees to the prevailing party.” That motion is currently pending. On May 24, 2019, Raytheon filed a notice of appeal with the Court of Appeals for the Federal Circuit of the Wisconsin court’s April 15, 2019 order granting Cray’s motion for summary judgment that the Software Patents were not infringed. No decision on the appeal is expected until 2020. The Company will continue to vigorously defend these actions including the appeal of the favorable decision by the Wisconsin court in the First Action. The probable outcome of the described litigation cannot be determined, nor can the Company estimate a range of potential loss (or gain from a potential recovery of attorney’s fees). Based on its review of the matters to date, the Company notes that its defenses have to date prevailed in the First Action, and the Company believes that it has valid defenses in the Second Action. As a result, the Company considers the likelihood of a material loss related to these matters to be remote. The Company is also subject to putative shareholder class action lawsuits in connection with the Merger Agreement. On June 19, 2019, a putative shareholder class action complaint was filed in the Superior Court of the State of Washington for King County against Cray and the individual members of Cray’s Board of Directors, captioned Keith v. Cray Inc., et al. , Case No. 19-2-16273-2 SEA (the “Keith Complaint”), asserting that the Board of Directors breached its fiduciary duties in connection with the proposed transaction with HPE by, among other things, allegedly conducting a flawed and conflicted sales process and by causing to be disseminated a materially incomplete and misleading proxy statement. On June 24, 2019, a similar putative shareholder class action complaint was filed in the Superior Court of the State of Washington for Snohomish County against Cray and the individual members of Cray’s Board of Directors, captioned Delman v. Ungaro, et al. , Case No. 19-2-05756-31 (the “Delman Complaint”). On July 10, 2019, another similar putative shareholder class action complaint was filed in the Superior Court of the State of Washington for King County against Cray and the individual members of Cray’s Board of Directors, captioned Rapacki v. Cray, et al. , Case No. 19-2-18093-5 SEA (the “Rapacki Complaint” and together with the Keith Complaint and the Delman Complaint, the “State Court Actions”). On June 20, 2019, a putative shareholder class action complaint was filed in the United States District Court, District of Delaware, against Cray, the individual members of Cray’s Board of Directors, HPE and Merger Sub, captioned Davie v. Cray Inc. et al. , Case No. 1:19-cv-01148-UNA (the “Davie Complaint”). On June 21, 2019, another putative shareholder class action complaint was filed in the same court against Cray, the individual members of Cray’s Board of Directors, HPE and Merger Sub, captioned Kent v. Cray Inc. et al. , Case No. 1:19-cv-01157-UNA (the “Kent Complaint”), and on June 24, 2019, an individual action was filed in the same court against the same defendants, captioned Stein v. Cray Inc. et al. , Case No. 1:19-cv-01188-UNA (the “Stein Complaint” and together with the Davie Complaint and Kent Complaint, the “Delaware Complaints”). On July 2, 2019, a putative shareholder class action complaint was filed in the United States District Court for the Western District of Washington against Cray and the individual members of Cray’s Board of Directors, captioned Epstein v. Cray Inc., et al. , Case No. [2:19-cv-01026] (the “Epstein Complaint” and together with the Delaware Complaints, the “Federal Court Actions”). The Federal Court Actions each assert that defendants violated Sections 14(a) and 20(a) of the Exchange Act by making untrue statements of material fact and omitting certain material facts related to the contemplated merger in the proxy statement. The State Court Actions and the Federal Court Actions seek, among other things, an order enjoining defendants from consummating the Merger, money damages and an award of attorneys’ and experts’ fees. The probable outcome of the State Court Actions and the Federal Court Actions cannot be determined, nor can the Company estimate a range of potential loss. The Company believes that the lawsuits are without merit and intends to vigorously defend those actions. As a result, the Company considers the likelihood of a material loss related to these matters to be remote.

Share-Based Compensation

Share-Based Compensation	6 Months Ended
	Jun. 30, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Compensation	Note 11— Share-Based Compensation The Company accounts for its share-based compensation based on an estimate of fair value of the grant on the date of grant. In determining the fair value of stock options, the Company uses the Black-Scholes option pricing model. The following key weighted average assumptions were employed in the calculation for the six month period ended June 30, 2019 and the three and six month periods ended June 30, 2018. There were no stock option grants during the three month period ended June 30, 2019: Three Months Ended Six Months Ended 2018 2019 2018 Risk-free interest rate 2.85% 2.47% 2.85% Expected dividend yield —% —% —% Volatility 48.93% 48.04% 48.93% Expected life 4.0 years 4.0 years 4.0 years Weighted average Black-Scholes value of options granted $11.13 $9.05 $11.13 The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant. The Company does not anticipate declaring dividends in the foreseeable future. Volatility is based on historical data. The expected life of an option is based on the assumption that options will be exercised, on average, about two years after vesting occurs. The Company recognizes compensation expense for only the portion of options that are expected to vest. Therefore, management applies an estimated forfeiture rate that is derived from historical employee termination data and adjusted for expected future employee turnover rates. The estimated forfeiture rate applied to the Company’s stock option grants during the three and six months ended June 30, 2019 and 2018 was 8.0% . If the actual number of forfeitures differs from those estimated by management, additional adjustments to compensation expense may be required in future periods. The Company’s stock price volatility, option lives and expected forfeiture rates involve management’s best estimates at the time of such determination, which impact the fair value of the option calculated under the Black-Scholes methodology and, ultimately, the expense that will be recognized over the vesting period or requisite service period of the option. The Company typically issues stock options with a four year vesting period (the requisite service period) and amortizes the fair value of stock options (stock compensation cost) ratably over the requisite service period. A summary of the Company’s year-to-date stock option activity and related information follows: Options Weighted Average Exercise Price Weighted Average Remaining Contractual Term (Years) Outstanding at December 31, 2018 1,877,602 $ 18.81 Grants 20,000 $ 22.62 Exercises (260,232 ) $ 6.03 Canceled and forfeited (5,006 ) $ 14.61 Outstanding at June 30, 2019 1,632,364 $ 20.90 5.5 Exercisable at June 30, 2019 1,326,280 $ 20.29 4.9 Available for grant at June 30, 2019 (1) 2,958,018 (1) Using the plan’s fungible ratio of 1.55 :1 for full-value awards, 1,908,399 shares were available for restricted stock awards, stock bonus awards, restricted stock units, performance shares or performance units. As of June 30, 2019 , there was $22.9 million of aggregate intrinsic value of outstanding stock options, including $19.5 million of aggregate intrinsic value of exercisable stock options. Intrinsic value represents the total pretax intrinsic value for all “in-the-money” options ( i.e. , the difference between the Company’s closing stock price on the last trading day of its second quarter of 2019 and the exercise price, multiplied by the number of shares of common stock underlying the stock options) that would have been received by the option holders had all option holders exercised their options on June 30, 2019 . During the three and six months ended June 30, 2019 , stock options covering 65,332 and 260,232 shares of common stock, respectively, with a total intrinsic value of $1.1 million and $4.7 million , respectively, were exercised. During the three and six months ended June 30, 2018 , stock options covering 20,699 and 192,814 shares of common stock, respectively, with a total intrinsic value of $0.3 million and $2.7 million , respectively, were exercised. The fair value of unvested restricted stock and unvested restricted stock units is based on the market price of a share of the Company’s common stock on the date of grant and is amortized over the vesting period. A summary of the Company’s unvested restricted stock grants and changes during the six months ended June 30, 2019 is as follows: Service Vesting Restricted Shares Shares Weighted Average Grant Date Fair Value Outstanding at December 31, 2018 34,269 $ 27.64 Granted 32,208 $ 34.69 Forfeited — $ — Vested (34,269 ) $ 27.64 Outstanding at June 30, 2019 32,208 $ 34.69 The estimated forfeiture rate applied to the Company’s restricted stock grants during the three and six months ended June 30, 2019 and 2018 , was 8.0% . The aggregate fair value of restricted stock vested during the three and six months ended June 30, 2019 , was $0.9 million and $0.9 million , respectively. The aggregate fair value of restricted stock vested during the three and six months ended June 30, 2018 , was $1.9 million and $2.0 million , respectively. A summary of the Company’s unvested restricted stock unit grants and changes during the six months ended June 30, 2019 is as follows: Service Vesting Restricted Stock Units Performance Vesting Restricted Stock Units Total Restricted Stock Units Units Weighted Average Grant Date Fair Value Units Weighted Units Weighted Average Grant Date Fair Value Outstanding at December 31, 2018 1,166,308 $ 23.07 482,485 $ 30.13 1,648,793 $ 25.14 Granted 544,700 $ 26.28 — $ — 544,700 $ 26.28 Forfeited (28,039 ) $ 22.21 — $ — (28,039 ) $ 22.21 Vested (242,050 ) $ 23.84 — $ — (242,050 ) $ 23.84 Outstanding at June 30, 2019 1,440,919 $ 24.17 482,485 $ 30.13 1,923,404 $ 25.66 The estimated forfeiture rate applied to the Company’s service vesting restricted stock unit grants during the three and six months ended June 30, 2019 and 2018 , was 8.0% . The aggregate fair value of restricted stock units vested during the three and six months ended June 30, 2019 , was $5.4 million and $5.8 million , respectively. The aggregate fair value of restricted stock units vested during the three and six months ended June 30, 2018 , was $4.7 million and $5.1 million , respectively. Restricted stock units are not outstanding shares and do not have any voting or dividend rights. At the time of vesting, a share of common stock representing each restricted stock unit vested will be issued by the Company. The performance vesting restricted stock units are subject to performance measures that are currently not considered “probable” of attainment and as such, no compensation cost has been recorded for these units. The period for which the performance measures of the performance vesting restricted stock units can be satisfied ends at the end of 2019. Under certain conditions, the performance vesting restricted shares vest upon a change in control. Based on the size of the Company’s merger with HPE, approximately 241 thousand performance vesting restricted stock units will ultimately vest, the majority of which require a one year service period by the holders subsequent to the close of our merger with HPE. Including performance-based equity awards, the Company had $41.5 million of total unrecognized compensation cost related to unvested stock options, unvested restricted stock and unvested restricted stock units as of June 30, 2019 . Excluding the $14.5 million of unrecognized compensation cost related to unvested restricted stock units that are subject to performance measures that are currently not considered “probable” of attainment, unrecognized compensation cost is $27.0 million . No compensation expense is recognized for unvested restricted stock units subject to performance measures that are not considered “probable” of attainment. Unrecognized compensation cost related to unvested stock options and unvested non-performance-based restricted stock is expected to be recognized over a weighted average period of 3.1 years. The following table sets forth the gross share-based compensation cost resulting from stock options, unvested restricted stock and unvested restricted stock units that were recorded in the Company’s Condensed Consolidated Statements of Operations for the three and six months ended June 30, 2019 and 2018 (in thousands): Three Months Ended Six Months Ended 2019 2018 2019 2018 Cost of product revenue $ 139 $ 110 $ 264 $ 216 Cost of service revenue 115 103 223 200 Research and development, net 1,354 1,101 2,523 1,961 Sales and marketing 1,044 744 1,833 1,478 General and administrative 1,449 1,134 2,924 2,279 Total $ 4,101 $ 3,192 $ 7,767 $ 6,134

Taxes

Taxes	6 Months Ended
	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Taxes	Note 12— Taxes The Company’s effective tax rates for the three and six months ended June 30, 2019 and 2018 were as follows: Three Months Ended Six Months Ended 2019 2018 2019 2018 Effective tax rates (0.1)% 3% (0.2)% (0.3)% The difference between the expected statutory tax rate of 21% and the actual tax rates for the three and six months ended June 30, 2019 and 2018 , was attributable to the Company’s decision to continue to provide a full valuation allowance against its U.S. federal deferred tax assets offset, in part, by foreign taxes. As of June 30, 2019 , the Company continued to provide a full valuation allowance against its U.S. federal deferred tax assets and against the majority of its deferred tax assets arising in state and foreign jurisdictions as the realization of such assets is not considered to be more likely than not at this time. The Company’s conclusion about the realizability of its deferred tax assets, and therefore the appropriateness of the valuation allowance, is reviewed quarterly and could change in future periods depending on the Company’s future assessment of all available evidence in support of the likelihood of realization of its deferred tax assets. If the Company’s conclusion about the realizability of its deferred tax assets and therefore the appropriateness of its valuation allowance changes in a future period, it could record a substantial tax benefit in its Condensed Consolidated Statements of Operations when that occurs.

Segment Information

Segment Information	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Segment Information	Note 13— Segment Information The Company has the following reportable segments: Supercomputing, Storage and Data Management, Maintenance and Support, and Engineering Services and Other. The Company’s reportable segments represent components of the Company for which separate financial information is available that is utilized on a regular basis by the Chief Executive Officer, who is the Chief Operating Decision Maker, in determining how to allocate the Company’s resources and evaluate performance. The segments are determined based on several factors, including the Company’s internal operating structure, the manner in which the Company’s operations are managed, client base, similar economic characteristics and the availability of separate financial information. Supercomputing Supercomputing includes a suite of highly advanced, tightly integrated and cluster supercomputer systems which are used by large research and engineering centers in universities, government laboratories, and commercial institutions. Supercomputing also includes the ongoing maintenance of these systems as well as system analysts. Storage and Data Management Storage and Data Management offers Cray DataWarp and ClusterStor (formerly branded Sonexion), as well as other third-party storage products and their ongoing maintenance as well as system analysts. Maintenance and Support Maintenance and Support provides ongoing maintenance of Cray supercomputers, big data storage and analytics systems, as well as system analysts. Engineering Services and Other Engineering Services and Other includes analytics and artificial intelligence-driven systems as well as Custom Engineering. The following data presents the Company's operating segment revenues disaggregated by primary geographic market, which is determined based on a customer's geographic location (in thousands). Regions represent Europe, the Middle East, and Africa (“EMEA”); Asia-Pacific and Japan; and the United States, Canada, and Latin America (“Americas”). Revenues were reduced by $0.1 million for the three and six months ended June 30, 2019 and $0.6 million and $1.1 million for the three and six months ended June 30, 2018 related to hedging gains and losses which do not represent revenues recognized from contracts with customers. Americas EMEA Asia Pacific & Japan Total Three Months Ended June 30, 2019 Supercomputing $ 36,860 $ 9,082 $ 4,890 $ 50,832 Storage and Data Management 6,288 2,613 1,764 10,665 Maintenance and Support 22,376 7,388 6,433 36,197 Engineering Services and Other 4,433 71 2,698 7,202 Elimination of inter-segment revenue (22,376 ) (7,388 ) (6,433 ) (36,197 ) Total revenue $ 47,581 $ 11,766 $ 9,352 $ 68,699 Americas EMEA Asia Pacific & Japan Total Three Months Ended June 30, 2018 Supercomputing $ 44,318 $ 14,148 $ 43,305 $ 101,771 Storage and Data Management 6,876 3,268 2,817 12,961 Maintenance and Support 21,117 7,752 5,425 34,294 Engineering Services and Other 5,189 58 224 5,471 Elimination of inter-segment revenue (21,117 ) (7,752 ) (5,425 ) (34,294 ) Total revenue $ 56,383 $ 17,474 $ 46,346 $ 120,203 Americas EMEA Asia Pacific & Japan Total Six Months Ended June 30, 2019 Supercomputing $ 72,542 $ 14,064 $ 14,533 $ 101,139 Storage and Data Management 19,346 4,753 3,652 27,751 Maintenance and Support 43,730 14,448 13,346 71,524 Engineering Services and Other 8,047 352 2,956 11,355 Elimination of inter-segment revenue (43,730 ) (14,448 ) (13,346 ) (71,524 ) Total revenue $ 99,935 $ 19,169 $ 21,141 $ 140,245 Americas EMEA Asia Pacific & Japan Total Six Months Ended June 30, 2018 Supercomputing $ 64,927 $ 22,806 $ 69,904 $ 157,637 Storage and Data Management 14,914 7,444 11,356 33,714 Maintenance and Support 41,663 15,241 10,224 67,128 Engineering Services and Other 7,910 118 418 8,446 Elimination of inter-segment revenue (41,663 ) (15,241 ) (10,224 ) (67,128 ) Total revenue $ 87,751 $ 30,368 $ 81,678 $ 199,797 The following table presents gross profit for the Company’s operating segments for the three and six months ended June 30, 2019 and 2018 (in thousands): Three Months Ended Six Months Ended 2019 2018 2019 2018 Gross Profit: Supercomputing $ 16,010 $ 29,051 $ 32,555 $ 47,172 Storage and Data Management 4,324 5,316 11,503 12,349 Maintenance and Support 15,910 17,871 32,583 32,946 Engineering Services and Other 3,613 3,440 5,913 5,238 Elimination of inter-segment gross profit (15,910 ) (17,871 ) (32,583 ) (32,946 ) Total gross profit $ 23,947 $ 37,807 $ 49,971 $ 64,759 Revenue and cost of revenue is the only discrete financial information the Company prepares for its segments. Other financial results or assets are not separated by segment. Sales to the U.S. Government totaled approximately $25.6 million and $61.6 million for the three and six months ended June 30, 2019 , respectively, compared to approximately $42.5 million and $61.4 million for the three and six months ended June 30, 2018 , respectively. For the six months ended June 30, 2019 , one non-U.S. Government customer accounted for 14% of total revenue. For the six months ended June 30, 2018 , one non-U.S. Government customer, which was located in Japan, accounted for 17% of total revenue. For the six months ended June 30, 2018, total revenue in Japan accounted for 26%

Basis of Presentation - (Polici

Basis of Presentation - (Policies)	6 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation The accompanying condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All material intercompany accounts and transactions have been eliminated.
Use of Estimates	Use of Estimates The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the amounts reported in the Company’s condensed consolidated financial statements and accompanying notes. Actual results could differ materially from those estimates.
New Accounting Pronouncements	New Accounting Pronouncements In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update No. 2016-02, Leases: Topic 842 (ASU 2016-02), which replaces existing lease guidance. The new standard is intended to provide enhanced transparency and comparability by requiring lessees to record right-of-use (“ROU”) assets and corresponding lease liabilities on the balance sheet. The new standard initially required application with a modified retrospective approach to each prior reporting period presented with various optional practical expedients. In July 2018, this requirement was amended with the issuance of Accounting Standards Update No. 2018-11, Leases: Topic 842: Targeted Improvements (ASU 2018-11), which permits an additional (and optional) transition method to adopt the new leases standard. The Company adopted ASU 2016-02 and related ASUs, collectively ASC 842, on January 1, 2019 using the optional transition method. Consequently, periods before January 1, 2019 will continue to be reported in accordance with the prior accounting guidance, ASC 840, Leases. The Company elected the package of practical expedients, which permits the Company to retain prior conclusions about lease identification, lease classification and initial direct costs for leases that commenced before January 1, 2019. The new standard also provides practical expedients for an entity’s ongoing accounting. The Company elected the short-term lease recognition exemption for all leases that qualify. The Company also elected the practical expedient to combine lease and non-lease components for all of its leases other than net lease real estate leases. Adoption of ASC 842 resulted in the recording of ROU assets and lease liabilities of $34.4 million and $46.6 million , respectively, as of January 1, 2019. The difference between ROU assets and lease liabilities relates to liabilities of $12.2 million for deferred rent and lease incentives liabilities that were included on the Company’s Condensed Consolidated Balance Sheets prior to adoption of ASC 842. These amounts were eliminated at the time of adoption and are included in the lease liabilities number above. Adoption of ASC 842 did not have a material impact on the Company’s consolidated net earnings and had no impact on cash flows. In August 2017, FASB issued Accounting Standards Update No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities (ASU 2017-12). The new standard simplifies and expands the eligible hedging strategies for financial and nonfinancial risks. It also enhances the transparency of how hedging results are presented and disclosed. Further, the new standard provides partial relief on the timing of certain aspects of hedge documentation and eliminates the requirement to recognize hedge ineffectiveness separately in earnings. The Company adopted ASU 2017-12 on January 1, 2019. Adoption of ASU 2017-12 did not have a material impact on the Company’s consolidated financial statements. Upon adoption of ASU 2017-12, the Company revised its accounting policy for foreign currency derivatives from the policy included in the Notes to Consolidated Financial Statements in its annual report on Form 10-K for year ended December 31, 2018. The revised accounting policy for foreign currency derivatives is included below. In February 2018, FASB issued Accounting Standards Update No. 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income (ASU 2018-02). The new standard amends ASC 220 to allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act and requires entities to provide certain disclosures regarding stranded tax effects. The Company adopted ASU 2018-02 on January 1, 2019. At the time of adoption, the Company reclassified $0.2 million of stranded tax effects resulting from the Tax Cuts and Jobs Act from accumulated other comprehensive income to accumulated deficit. Adoption of ASU 2018-02 did not have a material impact on the Company’s consolidated financial statements. In August 2018, FASB issued Accounting Standards Update No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement (ASU 2018-13). The new standard makes various modifications to the disclosure requirements on fair value measurement in Topic 820. The Company adopted ASU 2018-13 on January 1, 2019. Adoption of ASU 2018-13 did not have a material impact on the Company’s consolidated financial statements.
Foreign Currency Derivatives	Foreign Currency Derivatives The Company uses foreign currency exchange contracts to manage certain foreign currency exposures. Foreign currency exchange contracts are cash flow hedges of the Company’s foreign currency exposures on certain revenue contracts and are recorded at the contract’s fair value. Most of the Company’s foreign currency exchange contracts are designated as cash flow hedges for the purposes of hedge accounting treatment and any gains or losses on the foreign currency exchange contract is initially reported in “Accumulated other comprehensive income,” a component of shareholders’ equity, with a corresponding asset or liability recorded based on the fair value of the foreign currency exchange contract. When the hedged transaction is recognized, any unrecognized gains or losses on the hedged transaction are reclassified into results of operations in the same period and presented in the same income statement line item as the earnings effect of the hedged item. The Company excludes the changes in fair value of the contract related to forward points from the assessment of hedge effectiveness and the gains and losses associated with the excluded component are presented in the same line of the income statement for the hedged item. For hedging relationships executed before the date of adoption of ASU 2017-12, the gains and losses associated with the excluded components are recognized currently in earnings. The amortization approach is used for hedging relationships executed after the date of adoption of ASU 2017-02. Cash flows from foreign currency exchange contracts accounted for as cash flow hedges are classified in the same category as the cash flows from the items being hedged. The Company typically dedesignates its cash flow hedges for the purposes of hedge accounting treatment when the receivable related to the hedged cash flow is recorded. Unrealized gains or losses related to foreign currency exchange contracts that are not designated as cash flow hedges for the purposes of hedge accounting treatment are recorded in other income (expense) in the Condensed Consolidated Statements of Operations and are generally offset by foreign currency adjustments on related receivables. The Company does not use derivative financial instruments for speculative purposes.
Revenue Recognition	The Company’s performance obligations are satisfied over time as work is performed or at a point in time. The majority of the Company’s revenue is recognized at a point in time when products are accepted, installed or delivered. Most of the Company’s revenue is derived from long-term contracts that can span several years. Revenue is recognized when performance obligations under the terms of a contract with the customer are satisfied; generally, this occurs with the transfer of control of the Company’s systems or services. In general, this does not occur until the products have been shipped or services provided to the customer, risk of loss has transferred to the customer, and, where applicable, a customer acceptance has been obtained. Revenue is measured as the amount of consideration the Company expects to receive in exchange for transferring goods or providing services. Sales, value add, and other taxes that the Company collects concurrent with revenue-producing activities are excluded from revenue. Incidental items that are immaterial in the context of the contract are recognized as expense. To determine the proper revenue recognition method for contracts, the Company evaluates whether two or more contracts should be combined and accounted for as one single contract and whether the combined or single contract should be accounted for as more than one performance obligation. Contracts are often modified to account for changes in contract specifications and requirements. To determine the proper revenue recognition method for contract modifications, the Company evaluates whether the contract modification should be accounted for as a separate contract, part of an existing contract, or termination of an existing contract and the creation of a new contract. This evaluation requires significant judgment and the decision to combine a group of contracts or separate the combined or single contract into multiple performance obligations could change the amount of revenue and profit recorded in a given period. For contracts with multiple performance obligations, the Company allocates the contract’s transaction price to each performance obligation using the Company’s estimate of the standalone selling price of each distinct good or service in the contract. The Company determines the transaction price by reviewing the established contractual terms and other relevant information. Contracts can include penalty clauses and contracts with government customers may not be fully funded, both of which represent variable consideration. Generally, the Company includes both the funded and unfunded portions of a contract with a government customer in the transaction price, as most often it is deemed the contract will become fully funded. The Company also assesses the likelihood of certain penalties that would result in contract price reductions and, if deemed probable, the transaction price is adjusted. The majority of the Company’s contracts include multiple promised goods and services, which are assessed at contract inception. Each distinct good or service is identified as a performance obligation, which may be an individual good or service or a bundle of goods or services. In order to determine whether the promises are distinct, the Company assesses the use of its products and services by its customers to determine whether the customer can benefit from the good or service on its own or from other readily available resources, and whether the promised transfer of goods or services is separately identifiable from other promises in the contract. The majority of the Company’s revenues are from product solutions which include supercomputers, storage, and data analytics systems, each of which are usually separate performance obligations. Revenue is recognized when obligations under the terms of a contract with a customer are satisfied. Product revenue is typically recognized upon customer acceptance, or upon installation or delivery if formal acceptance is not required. Service revenue is typically recognized over time and consists mainly of system maintenance, analyst services, and engineering services, each of which are usually separate performance obligations. System maintenance commences upon customer acceptance or installation, depending on the contract terms, and revenue is recognized ratably over the remaining term of the maintenance contract. On-site analysts provide specialized services to customers, the revenue for which is recognized ratably over the contract period. Service revenue is recognized on a straight-line basis over the service period as the services are available continuously to the customer. Revenue from engineering services can be recognized as services are performed or as milestones are achieved, depending on the terms of the contract and nature of services performed. If, in a contract, the customer has an option to acquire additional goods or services, that option gives rise to a performance obligation if the option provides a material right to the customer that it would not receive without entering into that contract. Revenue from purchase options can be recognized as those future goods or services are transferred or when the option expires. The Company performs an assessment to determine whether a significant financing component is present in a contract. If a contract is determined to include a significant financing component, the interest rate used in the calculation is based on the prevailing interest rates at contract inception and the entity’s creditworthiness. When the period between providing a good or service to the customer is expected to be less than one year from payment, the Company applies the practical expedient and does not adjust the consideration for the effects of a significant financing component. Occasionally, the Company’s contracts include noncash consideration. This typically consists of returned parts when a system is upgraded or de-installed. Noncash consideration is measured at contract inception at estimated fair value. The total transaction price is allocated to each performance obligation identified in the contract based on its relative standalone selling price. The Company does not have directly observable standalone selling prices for the majority of its performance obligations due to a relatively small number of customer contracts that differ in system size and contract terms which can be due to infrequently selling each performance obligation separately, not pricing products within a narrow range, or only having a limited sales history, such as in the case of certain advanced and emerging technologies. When a directly observable standalone selling price is not available, the Company estimates the standalone selling price. In determining the estimated standalone selling price, the Company uses the cost to provide the product or service plus a margin, or considers other factors. When using cost plus a margin, the Company considers the total cost of the product or service, including customer-specific and geographic factors as appropriate. The Company also considers the historical margins of the product or service on previous contracts and several other factors including any changes to pricing methodologies, competitiveness of products and services, and cost drivers that would cause future margins to differ from historical margins. The Company sometimes offers discounts to its customers. As these discounts are offered on bundles of goods and services, the discounts are applied to all performance obligations in the contract on a pro-rata basis.

Revenue Recognition - (Tables)

Revenue Recognition - (Tables)	6 Months Ended
	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Contract Receivables, Contract Assets, and Contract Liabilities from Contracts with Customers	The following table provides information about contract receivables, contract assets, and contract liabilities from contracts with customers (in thousands) and includes both short-term and long-term portions: June 30, December 31, 2018 Change Contract receivables $ 67,214 $ 78,634 $ (11,420 ) Contract assets 5,793 6,404 (611 ) Contract liabilities 77,430 94,004 (16,574 )

Fair Value Measurement - (Table

Fair Value Measurement - (Tables)	6 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Company's Financial Assets and Liabilities Measured at Fair Value and the Hierarchy of the Valuation Inputs	The following table presents information about the Company’s financial assets that have been measured at fair value as of June 30, 2019 , and indicates the level within the fair value hierarchy of the valuation inputs utilized to determine such fair value (in thousands): Description Fair Value Quoted Prices in Active Markets (Level 1) Significant Other Observable Inputs (Level 2) Assets: Cash, cash equivalents and restricted cash $ 165,152 $ 165,152 $ — Foreign currency exchange contracts (1) 2,400 — 2,400 Assets measured at fair value at June 30, 2019 $ 167,552 $ 165,152 $ 2,400 Liabilities: Foreign currency exchange contracts (2) 111 $ — 111 Liabilities measured at fair value at June 30, 2019 $ 111 $ — $ 111 (1) Included in “Prepaid expenses and other current assets” and “Other non-current assets” on the Company’s Condensed Consolidated Balance Sheets. (2) Included in “Other accrued liabilities” and “Other non-current liabilities” on the Company’s Consolidated Balance Sheets.
Schedule of Notional Amounts of Outstanding Derivative Positions	As of June 30, 2019 and December 31, 2018 , the Company had outstanding foreign currency exchange contracts that had been dedesignated for the purposes of hedge accounting treatment. The Company dedesignates cash flow hedges when the receivable related to the hedged cash flow is recorded. The outstanding notional amounts were approximately (in millions): June 30, December 31, 2018 British Pounds (GBP) 13.1 24.8 Canadian Dollars (CAD) 47.9 — Korean Won (KRW) — 4,446.5 Singapore Dollars (SGD) — 2.0 As of June 30, 2019 and December 31, 2018 , the Company had outstanding foreign currency exchange contracts that were designated and accounted for as cash flow hedges of anticipated future cash receipts on sales contracts payable in foreign currencies. The outstanding notional amounts were approximately (in millions): June 30, December 31, 2018 Canadian Dollars (CAD) 6.5 54.4 Japanese Yen (JPY) 711.5 — Singapore Dollars (SGD) 1.8 —
Fair Values of Derivative Instruments and Balance Sheet Location	Fair values of derivative instruments designated as cash flow hedges (in thousands): Balance Sheet Location Fair Value Fair Value Prepaid expenses and other current assets $ — $ 1,296 Other non-current assets — 137 Other accrued liabilities (62 ) — Other non-current liabilities (6 ) — Total fair value of derivative instruments designated as cash flow hedges $ (68 ) $ 1,433 Fair values of derivative instruments not designated as cash flow hedges (in thousands): Balance Sheet Location Fair Value Fair Value Prepaid expenses and other current assets $ 1,941 $ 1,894 Other non-current assets 459 1,242 Accrued and other liabilities (43 ) (63 ) Total fair value of derivative instruments not designated as cash flow hedges $ 2,357 $ 3,073
Schedule of Foreign Exchange Contracts, Statement of Financial Position	The following table shows the impact on product revenue of foreign currency exchange contracts that were designated as cash flow hedges (in thousands): Three Months Ended Six Months Ended 2019 2018 2019 2018 Total amounts of product revenue presented in the condensed consolidated statement of operations in which the effects of cash flow hedges are recorded $ 29,924 $ 83,379 $ 64,082 127,833 Amount of gain (loss) recognized in other comprehensive income included in the assessment of effectiveness (171 ) 2,939 (1,020 ) 2,183 Amount of loss reclassified from accumulated other comprehensive income to product revenue (143 ) (633 ) (143 ) (1,109 ) Amount excluded from effectiveness testing recognized as an increase in product revenue based on changes in fair value 63 — 119 — Amount excluded from effectiveness testing recognized in earnings based on an amortization approach 6 — 6 —
Derivatives Not Designated as Hedging Instruments	The following table shows the impact on other expense of losses on foreign currency exchange contracts that were not designated as cash flow hedges. These amounts increased other income for all periods presented (in thousands): Three Months Ended Six Months Ended 2019 2018 2019 2018 Other income, net $ 442 $ 3,501 $ 16 $ 1,590

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income - (Tables)	6 Months Ended
	Jun. 30, 2019
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Reclassification from Accumulated Other Comprehensive Income (Loss)	The following table shows the impact on product revenue of reclassification adjustments from accumulated other comprehensive income resulting from hedged foreign currency transactions recorded by the Company for the three and six months ended June 30, 2019 and 2018 (in thousands). The reclassification adjustments decreased product revenue for the three and six months ended June 30, 2019 and 2018. Three Months Ended Six Months Ended 2019 2018 2019 2018 Gross of tax reclassifications $ (143 ) $ (633 ) $ (143 ) $ (1,109 ) Net of tax reclassifications $ (143 ) $ (633 ) $ (143 ) $ (1,109 )
Schedule of Accumulated Other Comprehensive Income (Loss)	The following tables show the changes in accumulated other comprehensive income by component for the three and six months ended June 30, 2019 and 2018 (in thousands): Three Months Ended June 30, 2019 Foreign Currency Translation Adjustments Unrealized Gain on Cash Flow Hedges Accumulated Other Comprehensive Income Beginning balance $ 1,024 $ 1,331 $ 2,355 Current-period change, net of tax (52 ) (769 ) (821 ) Ending balance $ 972 $ 562 $ 1,534 Income tax expense (benefit) associated with current-period change $ — $ — $ — Three Months Ended June 30, 2018 Unrealized Loss on Investments Foreign Currency Translation Adjustments Unrealized Gain (Loss) on Cash Flow Hedges Accumulated Other Comprehensive Income Beginning balance $ (9 ) $ 1,637 $ (1,445 ) 183 Current-period change, net of tax 9 (1,185 ) 2,939 1,763 Ending balance $ — $ 452 $ 1,494 $ 1,946 Income tax expense (benefit) associated with current-period change $ — $ — $ — $ — Six Months Ended June 30, 2019 Foreign Currency Translation Adjustments Unrealized Gain on Cash Flow Hedges Accumulated Other Comprehensive Income Beginning balance $ 606 $ 2,602 $ 3,208 Current-period change, net of tax 156 (1,618 ) (1,462 ) Reclassification of stranded tax effects resulting from adoption of ASU 2018-02 210 (422 ) (212 ) Ending balance $ 972 $ 562 $ 1,534 Income tax expense (benefit) associated with current-period change $ — $ — $ — Six Months Ended June 30, 2018 Unrealized Loss on Investments Foreign Currency Translation Adjustments Unrealized Gain (Loss) on Cash Flow Hedges Accumulated Other Comprehensive Income Beginning balance $ (7 ) $ 1,611 $ (689 ) $ 915 Current-period change, net of tax 7 (1,159 ) 2,183 1,031 Ending balance $ — $ 452 $ 1,494 $ 1,946 Income tax expense (benefit) associated with current-period change $ — $ — $ — $ —

Accounts and Other Receivable_2

Accounts and Other Receivables, Net - (Tables)	6 Months Ended
	Jun. 30, 2019
Receivables [Abstract]
Accounts and Other Receivables, Net	Net accounts and other receivables consisted of the following (in thousands): June 30, December 31, 2018 Trade accounts receivable $ 49,285 $ 63,414 Current contract assets 4,003 4,391 Advance billings 2,924 1,832 Short-term investment in sales-type lease 12,607 12,462 Other receivables 7,699 6,708 76,518 88,807 Allowance for doubtful accounts (17 ) (988 ) Accounts and other receivables, net $ 76,501 $ 87,819

Leases - (Tables)

Leases - (Tables)	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Lease Cash Flows	Supplemental cash flow information related to operating leases for the three and six months ended June 30, 2019 was as follows (in thousands): Three Months Ended Six Months Ended 2019 2019 Cash paid for amounts included in the measurement of operating lease liabilities: $ 2,081 $ 4,119 Operating right-of-use assets obtained in exchange for lease obligations: $ 116 $ 465
Lease Assets and Liabilities	Supplemental balance sheet information related to operating leases as of June 30, 2019 was as follows (in thousands, except lease term and discount rate): June 30, Operating lease right-of-use assets $ 32,656 Current portion of operating lease liabilities, included in accrued and other liabilities $ 4,664 Long-term operating lease liabilities 39,845 Total operating lease liabilities $ 44,509 Weighted average remaining lease term (in years): 8.72 Weighted average discount rate (1): 6.76 % (1) Where the Company could not determine the rate inherent in the lease, its incremental borrowing rate was calculated using LIBOR plus a spread for similar companies.
Operating Lease Liability Maturity	As of June 30, 2019 , maturities of operating lease liabilities were as follows (in thousands): 2019 (less than 1 year) $ 4,143 2020 8,184 2021 7,979 2022 7,628 2023 6,731 Thereafter 30,046 Total lease payments 64,711 Less: interest (20,202 ) Present value of lease liabilities $ 44,509
Components of the Net Investment in the Sales-type Lease	The following table shows the components of the net investment in the sales-type lease as of June 30, 2019 and December 31, 2018 (in thousands): June 30, December 31, 2018 Total minimum lease payments to be received $ 18,169 $ 25,543 Less: executory costs (2,123 ) (2,985 ) Net minimum lease payments receivable 16,046 22,558 Less: unearned income (242 ) (510 ) Net investment in sales-type lease 15,804 22,048 Less: long-term investment in sales-type lease included in other non-current assets (3,197 ) (9,586 ) Investment in sales-type lease included in accounts and other receivables $ 12,607 $ 12,462
Minimum Lease Payments to be Received	As of June 30, 2019 , minimum lease payments related to our sales-type lease for each of the succeeding two fiscal years are as follows (in thousands): 2019 (less than 1 year) $ 7,274 2020 10,895 Total minimum lease payments to be received $ 18,169

Inventory - (Tables)

Inventory - (Tables)	6 Months Ended
	Jun. 30, 2019
Inventory Disclosure [Abstract]
Inventory	Inventory consisted of the following (in thousands): June 30, December 31, 2018 Components and subassemblies $ 34,165 $ 42,390 Work in process 12,294 17,429 Finished goods 41,576 20,541 Total $ 88,035 $ 80,360

Customer Contract Liabilities -

Customer Contract Liabilities - (Tables)	6 Months Ended
	Jun. 30, 2019
Contract with Customer, Liability [Abstract]
Liability from Contract with Customer	Liabilities from contracts with customers consisted of the following (in thousands): June 30, December 31, 2018 Contract liability - product $ 5,916 $ 5,667 Contract liability - service 71,514 88,337 Total contract liabilities 77,430 94,004 Less: long-term contract liabilities (23,077 ) (32,021 ) Current contract liabilities $ 54,353 $ 61,983

Share-Based Compensation - (Tab

Share-Based Compensation - (Tables)	6 Months Ended
	Jun. 30, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Option Valuation Assumptions	The following key weighted average assumptions were employed in the calculation for the six month period ended June 30, 2019 and the three and six month periods ended June 30, 2018. There were no stock option grants during the three month period ended June 30, 2019: Three Months Ended Six Months Ended 2018 2019 2018 Risk-free interest rate 2.85% 2.47% 2.85% Expected dividend yield —% —% —% Volatility 48.93% 48.04% 48.93% Expected life 4.0 years 4.0 years 4.0 years Weighted average Black-Scholes value of options granted $11.13 $9.05 $11.13
Stock Option Activity	A summary of the Company’s year-to-date stock option activity and related information follows: Options Weighted Average Exercise Price Weighted Average Remaining Contractual Term (Years) Outstanding at December 31, 2018 1,877,602 $ 18.81 Grants 20,000 $ 22.62 Exercises (260,232 ) $ 6.03 Canceled and forfeited (5,006 ) $ 14.61 Outstanding at June 30, 2019 1,632,364 $ 20.90 5.5 Exercisable at June 30, 2019 1,326,280 $ 20.29 4.9 Available for grant at June 30, 2019 (1) 2,958,018 (1) Using the plan’s fungible ratio of 1.55 :1 for full-value awards, 1,908,399 shares were available for restricted stock awards, stock bonus awards, restricted stock units, performance shares or performance units.
Restricted Stock Activity	A summary of the Company’s unvested restricted stock unit grants and changes during the six months ended June 30, 2019 is as follows: Service Vesting Restricted Stock Units Performance Vesting Restricted Stock Units Total Restricted Stock Units Units Weighted Average Grant Date Fair Value Units Weighted Units Weighted Average Grant Date Fair Value Outstanding at December 31, 2018 1,166,308 $ 23.07 482,485 $ 30.13 1,648,793 $ 25.14 Granted 544,700 $ 26.28 — $ — 544,700 $ 26.28 Forfeited (28,039 ) $ 22.21 — $ — (28,039 ) $ 22.21 Vested (242,050 ) $ 23.84 — $ — (242,050 ) $ 23.84 Outstanding at June 30, 2019 1,440,919 $ 24.17 482,485 $ 30.13 1,923,404 $ 25.66 A summary of the Company’s unvested restricted stock grants and changes during the six months ended June 30, 2019 is as follows: Service Vesting Restricted Shares Shares Weighted Average Grant Date Fair Value Outstanding at December 31, 2018 34,269 $ 27.64 Granted 32,208 $ 34.69 Forfeited — $ — Vested (34,269 ) $ 27.64 Outstanding at June 30, 2019 32,208 $ 34.69
Allocation of Share-Based Compensation	The following table sets forth the gross share-based compensation cost resulting from stock options, unvested restricted stock and unvested restricted stock units that were recorded in the Company’s Condensed Consolidated Statements of Operations for the three and six months ended June 30, 2019 and 2018 (in thousands): Three Months Ended Six Months Ended 2019 2018 2019 2018 Cost of product revenue $ 139 $ 110 $ 264 $ 216 Cost of service revenue 115 103 223 200 Research and development, net 1,354 1,101 2,523 1,961 Sales and marketing 1,044 744 1,833 1,478 General and administrative 1,449 1,134 2,924 2,279 Total $ 4,101 $ 3,192 $ 7,767 $ 6,134

Taxes - (Tables)

Taxes - (Tables)	6 Months Ended
	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Effective Tax Rates	The Company’s effective tax rates for the three and six months ended June 30, 2019 and 2018 were as follows: Three Months Ended Six Months Ended 2019 2018 2019 2018 Effective tax rates (0.1)% 3% (0.2)% (0.3)%

Segment Information - (Tables)

Segment Information - (Tables)	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Revenue by Geographic Location	Engineering Services and Other includes analytics and artificial intelligence-driven systems as well as Custom Engineering. The following data presents the Company's operating segment revenues disaggregated by primary geographic market, which is determined based on a customer's geographic location (in thousands). Regions represent Europe, the Middle East, and Africa (“EMEA”); Asia-Pacific and Japan; and the United States, Canada, and Latin America (“Americas”). Revenues were reduced by $0.1 million for the three and six months ended June 30, 2019 and $0.6 million and $1.1 million for the three and six months ended June 30, 2018 related to hedging gains and losses which do not represent revenues recognized from contracts with customers. Americas EMEA Asia Pacific & Japan Total Three Months Ended June 30, 2019 Supercomputing $ 36,860 $ 9,082 $ 4,890 $ 50,832 Storage and Data Management 6,288 2,613 1,764 10,665 Maintenance and Support 22,376 7,388 6,433 36,197 Engineering Services and Other 4,433 71 2,698 7,202 Elimination of inter-segment revenue (22,376 ) (7,388 ) (6,433 ) (36,197 ) Total revenue $ 47,581 $ 11,766 $ 9,352 $ 68,699 Americas EMEA Asia Pacific & Japan Total Three Months Ended June 30, 2018 Supercomputing $ 44,318 $ 14,148 $ 43,305 $ 101,771 Storage and Data Management 6,876 3,268 2,817 12,961 Maintenance and Support 21,117 7,752 5,425 34,294 Engineering Services and Other 5,189 58 224 5,471 Elimination of inter-segment revenue (21,117 ) (7,752 ) (5,425 ) (34,294 ) Total revenue $ 56,383 $ 17,474 $ 46,346 $ 120,203 Americas EMEA Asia Pacific & Japan Total Six Months Ended June 30, 2019 Supercomputing $ 72,542 $ 14,064 $ 14,533 $ 101,139 Storage and Data Management 19,346 4,753 3,652 27,751 Maintenance and Support 43,730 14,448 13,346 71,524 Engineering Services and Other 8,047 352 2,956 11,355 Elimination of inter-segment revenue (43,730 ) (14,448 ) (13,346 ) (71,524 ) Total revenue $ 99,935 $ 19,169 $ 21,141 $ 140,245 Americas EMEA Asia Pacific & Japan Total Six Months Ended June 30, 2018 Supercomputing $ 64,927 $ 22,806 $ 69,904 $ 157,637 Storage and Data Management 14,914 7,444 11,356 33,714 Maintenance and Support 41,663 15,241 10,224 67,128 Engineering Services and Other 7,910 118 418 8,446 Elimination of inter-segment revenue (41,663 ) (15,241 ) (10,224 ) (67,128 ) Total revenue $ 87,751 $ 30,368 $ 81,678 $ 199,797
Information on Operating Segments	The following table presents gross profit for the Company’s operating segments for the three and six months ended June 30, 2019 and 2018 (in thousands): Three Months Ended Six Months Ended 2019 2018 2019 2018 Gross Profit: Supercomputing $ 16,010 $ 29,051 $ 32,555 $ 47,172 Storage and Data Management 4,324 5,316 11,503 12,349 Maintenance and Support 15,910 17,871 32,583 32,946 Engineering Services and Other 3,613 3,440 5,913 5,238 Elimination of inter-segment gross profit (15,910 ) (17,871 ) (32,583 ) (32,946 ) Total gross profit $ 23,947 $ 37,807 $ 49,971 $ 64,759

Basis of Presentation - Narrati

Basis of Presentation - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	May 16, 2019	Jan. 01, 2019	Jun. 30, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Merger Price	$ 35
Operating lease right-of-use assets			$ 32,656	$ 0
Operating lease liability			44,509
Deferred rent and lease incentive liability				$ 12,200
Reclassification of stranded tax effects resulting from adoption of ASU 2018-02			(212)
Legal Fees			7,600
Accrued Bonuses			17,000
Potential Merger Related Costs			$ 46,000
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets		$ 34,400
Operating lease liability		46,600
Accounting Standards Update 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of stranded tax effects resulting from adoption of ASU 2018-02		$ 200

Revenue Recognition - Contract

Revenue Recognition - Contract Receivables, Contract Assets, and Contract Liabilities from Contracts with Customers (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Contract receivables	$ 67,214	$ 78,634
Contract assets	5,793	6,404
Contract liabilities	77,430	$ 94,004
Change
Contract receivables	(11,420)
Contract assets	(611)
Contract liabilities	$ (16,574)

Revenue Recognition - Narrative

Revenue Recognition - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Revenue recognized			$ 35.1
Deferred commissions	$ 4.2		4.2		$ 2
Recognized commissions expense	0.8	$ 1.5	1.8	$ 2.6
Revenues with remaining performance obligations	639		639
Losses resulting from hedged foreign currency transactions			0.2
Go/No Go
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Revenues with remaining performance obligations	$ 500		$ 500

Revenue Recognition - Remaining

Revenue Recognition - Remaining Performance Obligation (Details)	Jun. 30, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-06-30
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected timing of satisfaction, percent	60.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-09-30
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected timing of satisfaction, period	18 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-06-30
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected timing of satisfaction, period	6 years

- Fair Value (Details)

- Fair Value (Details) $ in Thousands	Jun. 30, 2019USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash, cash equivalents and restricted cash	$ 165,152
Foreign currency exchange contracts	2,400
Assets measured at fair value at June 30, 2019	167,552
Foreign Currency Contracts, Liability, Fair Value Disclosure	111
Accrued Liabilities, Fair Value Disclosure	111
Quoted Prices in Active Markets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash, cash equivalents and restricted cash	165,152
Foreign currency exchange contracts	0
Assets measured at fair value at June 30, 2019	165,152
Foreign Currency Contracts, Liability, Fair Value Disclosure	0
Accrued Liabilities, Fair Value Disclosure	0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash, cash equivalents and restricted cash	0
Foreign currency exchange contracts	2,400
Assets measured at fair value at June 30, 2019	2,400
Foreign Currency Contracts, Liability, Fair Value Disclosure	111
Accrued Liabilities, Fair Value Disclosure	$ 111

Fair Value Measurement - Deriva

Fair Value Measurement - Derivative Instruments and Hedging Activities Disclosure (Details) $ in Thousands, ₩ in Millions, ¥ in Millions, £ in Millions, $ in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)	Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)	Jun. 30, 2019JPY (¥)	Jun. 30, 2019SGD ($)	Jun. 30, 2019KRW (₩)	Jun. 30, 2019CAD ($)	Jun. 30, 2019GBP (£)	Dec. 31, 2018USD ($)	Dec. 31, 2018JPY (¥)	Dec. 31, 2018SGD ($)	Dec. 31, 2018KRW (₩)	Dec. 31, 2018CAD ($)	Dec. 31, 2018GBP (£)
Derivative [Line Items]
Foreign currency exposure on hedged foreign currency contracts	$ 12,900		$ 12,900							$ 41,600
Foreign currency exposure on dedesignated foreign currency contracts	55,800		55,800							40,600
Other accrued liabilities	(62)		(62)							0
Other non-current liabilities	(2,384)		(2,384)							(12,394)
Total amounts of product revenue presented in the condensed consolidated statement of operations in which the effects of cash flow hedges are recorded	68,699	$ 120,203	140,245	$ 199,797
Designated as Hedging Instrument
Derivative [Line Items]
Other non-current liabilities	(6)		(6)							0
Total fair value of derivative instruments not designated as cash flow hedges	(68)		(68)							1,433
Not Designated as Hedging Instrument
Derivative [Line Items]
Total fair value of derivative instruments not designated as cash flow hedges	2,357		2,357							3,073
Prepaid expenses and other current assets | Designated as Hedging Instrument
Derivative [Line Items]
Derivative asset, current	0		0							1,296
Prepaid expenses and other current assets | Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative asset, current	1,941		1,941							1,894
Other non-current assets | Designated as Hedging Instrument
Derivative [Line Items]
Derivative asset, noncurrent	0		0							137
Other non-current assets | Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative asset, noncurrent	459		459							1,242
Accrued and other liabilities | Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative liability, current	(43)		(43)							$ (63)
Foreign Exchange Contract | Cash Flow Hedging
Derivative [Line Items]
Amount of loss reclassified from accumulated other comprehensive income to product revenue	(143)	(633)	(143)	(1,109)
Amount excluded from effectiveness testing recognized as an increase in product revenue based on changes in fair value	63	0	119	0
Amount excluded from effectiveness testing recognized as an increase in product revenue based on changes in fair value	(171)	2,939	(1,020)	2,183
Foreign Currency Amortization	6	0	6	0
Product
Derivative [Line Items]
Total amounts of product revenue presented in the condensed consolidated statement of operations in which the effects of cash flow hedges are recorded	29,924	83,379	64,082	127,833
Other Expense | Foreign Exchange Contract
Derivative [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ 442	$ 3,501	$ 16	$ 1,590
British Pounds (GBP) | Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative, notional amount | £									£ 13.1						£ 24.8
Canada, Dollars
Derivative [Line Items]
Derivative, notional amount								$ 6.5						$ 54.4
Canada, Dollars | Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative, notional amount								$ 47.9						$ 0
Japan, Yen
Derivative [Line Items]
Derivative, notional amount | ¥					¥ 711.5						¥ 0
Singapore, Dollars
Derivative [Line Items]
Derivative, notional amount						$ 1.8						$ 0
Singapore, Dollars | Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative, notional amount						$ 0						$ 2
Korea (North), Won | Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative, notional amount | ₩							₩ 0						₩ 4,446.5

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Gross of tax reclassifications	$ (143)	$ (633)	$ (143)	$ (1,109)
Net of tax reclassifications	(143)	(633)	(143)	(1,109)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	2,355	183	3,208	915
Current-period change, net of tax	(821)	1,763	(1,462)	1,031
Reclassification of stranded tax effects resulting from adoption of ASU 2018-02			(212)
Ending balance	1,534	1,946	1,534	1,946
Income tax expense (benefit) associated with current-period change	0	0	0	0
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	1,024	1,637	606	1,611
Current-period change, net of tax	(52)	(1,185)	156	(1,159)
Reclassification of stranded tax effects resulting from adoption of ASU 2018-02			210
Ending balance	972	452	972	452
Income tax expense (benefit) associated with current-period change	0	0	0	0
Unrealized Gain on Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	1,331	(1,445)	2,602	(689)
Current-period change, net of tax	(769)	2,939	(1,618)	2,183
Reclassification of stranded tax effects resulting from adoption of ASU 2018-02			(422)
Ending balance	562	1,494	562	1,494
Income tax expense (benefit) associated with current-period change	$ 0	0	$ 0	0
Unrealized Loss on Investments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		(9)		(7)
Current-period change, net of tax		9		7
Ending balance		0		0
Income tax expense (benefit) associated with current-period change		$ 0		$ 0

Loss Per Share (EPS) - Narrativ

Loss Per Share (EPS) - Narrative (Details) - shares shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Service Vesting Restricted Shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	3.1	3	3.1	3
Performance Shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	0.5	0.5	0.5	0.5

Accounts and Other Receivable_3

Accounts and Other Receivables, Net - Narrative (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and other receivables, gross	$ 76,518	$ 88,807
Allowance for doubtful accounts	(17)	(988)
Accounts and other receivables, net	76,501	87,819
Trade accounts receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and other receivables, gross	49,285	63,414
Current contract assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and other receivables, gross	4,003	4,391
Advance billings
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and other receivables, gross	2,924	1,832
Short-term investment in sales-type lease
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and other receivables, gross	12,607	12,462
Other receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and other receivables, gross	$ 7,699	$ 6,708
Non-US Government Customers | Accounts Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk (as a percent)	35.00%	28.00%
Government Contracts Concentration Risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and other receivables, net	$ 12,000	$ 25,600
Government Contracts Concentration Risk | Unbilled Revenues
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and other receivables, net	$ 2,400	$ 1,500

Leases - Narrative (Details)

Leases - Narrative (Details) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2019USD ($)	Jun. 30, 2019USD ($)
Lessee, Lease, Description [Line Items]
Operating lease renewal term (in years)	5 years	5 years
Operating lease cost	$ 1.9	$ 3.7
Sales-type lease interest income	$ 0.1	$ 0.3
Minimum
Lessee, Lease, Description [Line Items]
Operating lease term (in years)	1 year	1 year
Operating lease option to terminate (in years)		1 year
Maximum
Lessee, Lease, Description [Line Items]
Operating lease term (in years)	11 years	11 years
Operating lease option to terminate (in years)		5 years

Leases - Lease Cash Flows (Deta

Leases - Lease Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Leases [Abstract]
Cash paid for amounts included in the measurement of operating lease liabilities:	$ 2,081	$ 4,119
Operating right-of-use assets obtained in exchange for lease obligations:	$ 116	$ 465

Leases - Lease Assets and Liabi

Leases - Lease Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Leases [Abstract]
Operating lease right-of-use assets	$ 32,656	$ 0
Current portion of operating lease liabilities, included in accrued and other liabilities	4,664
Long-term operating lease liabilities	39,845	$ 0
Total operating lease liabilities	$ 44,509
Weighted average remaining lease term (in years)	8 years 8 months 19 days
Weighted average discount rate	6.76%

Leases - Operating Lease Liabil

Leases - Operating Lease Liability Maturity (Details) $ in Thousands	Jun. 30, 2019USD ($)
Leases [Abstract]
2019 (less than 1 year)	$ 4,143
2020	8,184
2021	7,979
2022	7,628
2023	6,731
Thereafter	30,046
Total lease payments	64,711
Less: interest	(20,202)
Present value of lease liabilities	$ 44,509

Leases - Net investment (Detail

Leases - Net investment (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Leases [Abstract]
Total minimum lease payments to be received	$ 18,169
Less: executory costs	(2,123)
Net minimum lease payments receivable	16,046
Less: unearned income	(242)
Net investment in sales-type lease	15,804
Less: long-term investment in sales-type lease included in other non-current assets	(3,197)
Investment in sales-type lease included in accounts and other receivables	12,607
Total minimum lease payments to be received		$ 25,543
Less: executory costs		(2,985)
Net minimum lease payments receivable		22,558
Less: unearned income		(510)
Net investment in sales-type lease		22,048
Less: long-term investment in sales-type lease included in other non-current assets		(9,586)
Investment in sales-type lease included in accounts and other receivables		$ 12,462
2019 (less than 1 year)	7,274
2020	$ 10,895

Inventory - Narrative (Details)

Inventory - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Inventory [Line Items]
Components and subassemblies	$ 34,165	$ 34,165	$ 42,390
Work in process	12,294	12,294	17,429
Finished goods	41,576	41,576	20,541
Total	88,035	88,035	80,360
Inventory write-down	600	3,800
Located at Customer Sites
Inventory [Line Items]
Finished goods	41,600	41,600	16,000
Government Contracts Concentration Risk | Finished Goods Inventory
Inventory [Line Items]
Finished goods	12,700	12,700	$ 13,900
Non-US Government Customers | Finished Goods Inventory
Inventory [Line Items]
Finished goods	$ 27,000	$ 27,000

Customer Contract Liabilities_2

Customer Contract Liabilities - Narrative (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Contract liabilities	$ 77,430	$ 94,004
Less: long-term contract liabilities	(23,077)	(32,021)
Current contract liabilities	54,353	61,983
Product
Disaggregation of Revenue [Line Items]
Contract liabilities	5,916	5,667
Service
Disaggregation of Revenue [Line Items]
Contract liabilities	71,514	88,337
Government Contracts Concentration Risk
Disaggregation of Revenue [Line Items]
Contract liabilities	$ 22,300	$ 29,800

Contingencies - Narrative (Deta

Contingencies - Narrative (Details) - Pending Litigation - patent	Apr. 22, 2016	Sep. 25, 2015
Civil Action No. 3:18-cv-00318-wmc
Loss Contingencies [Line Items]
Loss contingency, patents allegedly infringed, number		4
Civil Action No. 3:18-cv-00318-wmc | Patents Related to Company's Computer Hardware
Loss Contingencies [Line Items]
Loss contingency, patents allegedly infringed, number		2
Civil Action No. 3:18-cv-00318-wmc | Patents Related to Third Party's Computer Software
Loss Contingencies [Line Items]
Loss contingency, patents allegedly infringed, number		2
Civil Action No. 3:18-cv-03388-RS
Loss Contingencies [Line Items]
Loss contingency, patents allegedly infringed, number	5
Civil Action No. 3:18-cv-03388-RS | Patents Related to Third Party's Computer Software
Loss Contingencies [Line Items]
Loss contingency, patents allegedly infringed, number	5

Share-Based Compensation - Assu

Share-Based Compensation - Assumptions (Details) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk rree interest rate minimum		2.85%	2.47%	2.85%
Expected dividend yield		0.00%	0.00%	0.00%
Volatility		48.93%	48.04%	48.93%
Expected life		4 years	4 years	4 years
Weighted average Black-Scholes value of options granted (in dollars per share)		$ 11.13	$ 9.05	$ 11.13
Expected average period options will be exercised after vesting			2 years
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated forfeiture rate	8.00%	8.00%	8.00%	8.00%
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated forfeiture rate		8.00%	8.00%	8.00%
Award vesting period			4 years
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated forfeiture rate	8.00%	8.00%	8.00%	8.00%

Share-Based Compensation - Opti

Share-Based Compensation - Options (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding beginning of the period (in shares)			1,877,602
Grants (in shares)			20,000
Exercises (in shares)	(65,332)	(20,699)	(260,232)	(192,814)
Canceled and forfeited (in shares)			(5,006)
Outstanding end of the period (in shares)	1,632,364		1,632,364
Exercisable end of the period (in shares)	1,326,280		1,326,280
Available for grant end of the period (in shares)	2,958,018		2,958,018
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Outstanding beginning of the period (in dollars per share)			$ 18.81
Grants (in dollars per share)			22.62
Exercises (in dollars per share)			6.03
Canceled and forfeited (in dollars per share)			14.61
Outstanding end of the period (in dollars per share)	$ 20.90		20.90
Exercisable end of the period (in dollars per share)	$ 20.29		$ 20.29
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding, weighted average remaining contractual term (in years)			5 years 6 months
Exercisable, weighted average remaining contractual term (in years)			4 years 10 months 24 days
Fungible ratio			155.00%
Fungible shares available for grant (in shares)	1,908,399		1,908,399
Outstanding, aggregate intrinsic value	$ 22.9		$ 22.9
Exercisable, aggregate intrinsic value	19.5		19.5
Intrinsic value of options exercised	$ 1.1	$ 0.3	$ 4.7	$ 2.7

Share-Based Compensation - Rest

Share-Based Compensation - Restricted Stock (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Service Vesting Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding beginning of the period (in shares)			34,269
Granted (in shares)			32,208
Forfeited (in shares)			0
Vested (in shares)			(34,269)
Outstanding end of the period (in shares)	32,208		32,208
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Outstanding beginning of the period (in dollars per share)			$ 27.64
Granted (in dollars per share)			34.69
Forfeited (in dollars per share)			0
Vested (in dollars per share)			27.64
Outstanding end of the period (in dollars per share)	$ 34.69		$ 34.69
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Fair value of restricted stock vested in period	$ 0.9	$ 1.9	$ 0.9	$ 2

Share-Based Compensation - Re_2

Share-Based Compensation - Restricted Stock Units (Details) - Restricted Stock Units (RSUs) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding beginning of the period (in shares)			1,648,793
Granted (in shares)			544,700
Forfeited (in shares)			(28,039)
Vested (in shares)			(242,050)
Outstanding end of the period (in shares)	1,923,404		1,923,404
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Outstanding beginning of the period (in dollars per share)			$ 25.14
Granted (in dollars per share)			26.28
Forfeited (in dollars per share)			22.21
Vested (in dollars per share)			23.84
Outstanding end of the period (in dollars per share)	$ 25.66		$ 25.66
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Estimated forfeiture rate	8.00%	8.00%	8.00%	8.00%
Fair value of restricted stock units vested in period	$ 5.4	$ 4.7	$ 5.8	$ 5.1
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number	241,000		241,000
Service Vesting Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding beginning of the period (in shares)			1,166,308
Granted (in shares)			544,700
Forfeited (in shares)			(28,039)
Vested (in shares)			(242,050)
Outstanding end of the period (in shares)	1,440,919		1,440,919
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Outstanding beginning of the period (in dollars per share)			$ 23.07
Granted (in dollars per share)			26.28
Forfeited (in dollars per share)			22.21
Vested (in dollars per share)			23.84
Outstanding end of the period (in dollars per share)	$ 24.17		$ 24.17
Performance Vesting Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding beginning of the period (in shares)			482,485
Granted (in shares)			0
Forfeited (in shares)			0
Vested (in shares)			0
Outstanding end of the period (in shares)	482,485		482,485
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Outstanding beginning of the period (in dollars per share)			$ 30.13
Granted (in dollars per share)			0
Forfeited (in dollars per share)			0
Vested (in dollars per share)			0
Outstanding end of the period (in dollars per share)	$ 30.13		$ 30.13

- Aggregate (Details)

- Aggregate (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized [Abstract]
Unrecognized compensation expense	$ 41,500		$ 41,500
Unrecognized compensation expense period of recognition			3 years 1 month 6 days
Share-based compensation expense	4,101	$ 3,192	$ 7,767	$ 6,134
Performance Shares
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized [Abstract]
Unrecognized compensation expense	14,500		14,500
Service Vesting Restricted Shares
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized [Abstract]
Unrecognized compensation expense	27,000		27,000
Research and development, net
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized [Abstract]
Share-based compensation expense	1,354	1,101	2,523	1,961
Sales and marketing
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized [Abstract]
Share-based compensation expense	1,044	744	1,833	1,478
General and administrative
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized [Abstract]
Share-based compensation expense	1,449	1,134	2,924	2,279
Product | Cost of Sales
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized [Abstract]
Share-based compensation expense	139	110	264	216
Service | Cost of Sales
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized [Abstract]
Share-based compensation expense	$ 115	$ 103	$ 223	$ 200

Taxes - Narrative (Details)

Taxes - Narrative (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Effective tax rates (as a percent)	(0.10%)	3.00%	(0.20%)	(0.30%)
Expected statutory tax rate (as a percent)	21.00%	21.00%	21.00%	21.00%

Segment Information - Disaggreg

Segment Information - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue	$ 68,699	$ 120,203	$ 140,245	$ 199,797
Americas
Disaggregation of Revenue [Line Items]
Revenue	47,581	56,383	99,935	87,751
EMEA
Disaggregation of Revenue [Line Items]
Revenue	11,766	17,474	19,169	30,368
Asia Pacific & Japan
Disaggregation of Revenue [Line Items]
Revenue	9,352	46,346	21,141	81,678
Supercomputing
Disaggregation of Revenue [Line Items]
Revenue	50,832	101,771	101,139	157,637
Supercomputing | Americas
Disaggregation of Revenue [Line Items]
Revenue	36,860	44,318	72,542	64,927
Supercomputing | EMEA
Disaggregation of Revenue [Line Items]
Revenue	9,082	14,148	14,064	22,806
Supercomputing | Asia Pacific & Japan
Disaggregation of Revenue [Line Items]
Revenue	4,890	43,305	14,533	69,904
Storage and Data Management
Disaggregation of Revenue [Line Items]
Revenue	10,665	12,961	27,751	33,714
Storage and Data Management | Americas
Disaggregation of Revenue [Line Items]
Revenue	6,288	6,876	19,346	14,914
Storage and Data Management | EMEA
Disaggregation of Revenue [Line Items]
Revenue	2,613	3,268	4,753	7,444
Storage and Data Management | Asia Pacific & Japan
Disaggregation of Revenue [Line Items]
Revenue	1,764	2,817	3,652	11,356
Maintenance and Support
Disaggregation of Revenue [Line Items]
Revenue	36,197	34,294	71,524	67,128
Maintenance and Support | Americas
Disaggregation of Revenue [Line Items]
Revenue	22,376	21,117	43,730	41,663
Maintenance and Support | EMEA
Disaggregation of Revenue [Line Items]
Revenue	7,388	7,752	14,448	15,241
Maintenance and Support | Asia Pacific & Japan
Disaggregation of Revenue [Line Items]
Revenue	6,433	5,425	13,346	10,224
Engineering Services and Other
Disaggregation of Revenue [Line Items]
Revenue	7,202	5,471	11,355	8,446
Engineering Services and Other | Americas
Disaggregation of Revenue [Line Items]
Revenue	4,433	5,189	8,047	7,910
Engineering Services and Other | EMEA
Disaggregation of Revenue [Line Items]
Revenue	71	58	352	118
Engineering Services and Other | Asia Pacific & Japan
Disaggregation of Revenue [Line Items]
Revenue	2,698	224	2,956	418
Elimination of inter-segment revenue
Disaggregation of Revenue [Line Items]
Revenue	(36,197)	(34,294)	(71,524)	(67,128)
Elimination of inter-segment revenue | Americas
Disaggregation of Revenue [Line Items]
Revenue	(22,376)	(21,117)	(43,730)	(41,663)
Elimination of inter-segment revenue | EMEA
Disaggregation of Revenue [Line Items]
Revenue	(7,388)	(7,752)	(14,448)	(15,241)
Elimination of inter-segment revenue | Asia Pacific & Japan
Disaggregation of Revenue [Line Items]
Revenue	$ (6,433)	$ (5,425)	$ (13,346)	$ (10,224)
Revenue | JAPAN
Disaggregation of Revenue [Line Items]
Concentration Risk (as a percent)			14.00%	17.00%

Segment Information - Business

Segment Information - Business Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Total gross profit	$ 23,947	$ 37,807	$ 49,971	$ 64,759
Supercomputing
Segment Reporting Information [Line Items]
Total gross profit	16,010	29,051	32,555	47,172
Storage and Data Management
Segment Reporting Information [Line Items]
Total gross profit	4,324	5,316	11,503	12,349
Maintenance and Support
Segment Reporting Information [Line Items]
Total gross profit	15,910	17,871	32,583	32,946
Engineering Services and Other
Segment Reporting Information [Line Items]
Total gross profit	3,613	3,440	5,913	5,238
Elimination of inter-segment revenue
Segment Reporting Information [Line Items]
Total gross profit	$ (15,910)	$ (17,871)	$ (32,583)	$ (32,946)

Segment Information - Geographi

Segment Information - Geographical Segment Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019USD ($)Customers	Jun. 30, 2018USD ($)Customers	Jun. 30, 2019USD ($)Customers	Jun. 30, 2018USD ($)Customers
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 68,699	$ 120,203	$ 140,245	$ 199,797
Government Contracts Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 25,600	$ 42,500	$ 61,600	$ 61,400
Revenue
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, number of customers | Customers	1	1	1	1
Revenue | JAPAN
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration Risk (as a percent)			14.00%	17.00%
Total revenue | JAPAN
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration Risk (as a percent)				26.00%

Segment Information - Narrative

Segment Information - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting [Abstract]
Increase (Decrease) in Revenue	$ 0.1	$ 0.6	$ (0.1)	$ 1.1