ExOne (XONE) 10-Q 9 Nov 16 2016 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Nov. 09, 2016
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q3
Trading Symbol	XONE
Entity Registrant Name	ExOne Co
Entity Central Index Key	1,561,627
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		16,111,286

Condensed Statement of Consolid

Condensed Statement of Consolidated Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenue
Revenue - third parties	$ 12,987	$ 8,712	$ 33,084	$ 22,861
Revenue - related parties	1	152	73	1,294
Revenue	12,988	8,864	33,157	24,155
Cost of sales	9,428	7,695	24,215	21,881
Gross profit	3,560	1,169	8,942	2,274
Operating expenses
Research and development	1,898	1,825	5,737	5,218
Selling, general and administrative	5,234	5,018	15,222	17,479
Goodwill impairment		4,419	0	4,419
Total operating expenses	7,132	11,262	20,959	27,116
Loss from operations	(3,572)	(10,093)	(12,017)	(24,842)
Other expense (income)
Interest expense	22	29	276	87
Other (income) expense - net	(8)	(4)	(306)	(83)
Total other (income) expense	14	25	(30)	4
Loss before income taxes	(3,586)	(10,118)	(11,987)	(24,846)
Provision (benefit) for income taxes	25	(41)	43	(200)
Net loss	$ (3,611)	$ (10,077)	$ (12,030)	$ (24,646)
Net loss per common share:
Basic	$ (0.23)	$ (0.70)	$ (0.76)	$ (1.71)
Diluted	$ (0.23)	$ (0.70)	$ (0.76)	$ (1.71)
Comprehensive loss:
Net loss	$ (3,611)	$ (10,077)	$ (12,030)	$ (24,646)
Other comprehensive income (loss):
Foreign currency translation adjustments	489	809	2,288	(3,854)
Comprehensive loss	$ (3,122)	$ (9,268)	$ (9,742)	$ (28,500)

Condensed Consolidated Balance

Condensed Consolidated Balance Sheet - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 29,813	$ 19,342
Accounts receivable - net of allowance of $1,697 (2016) and $1,920 (2015)	5,215	9,368
Inventories - net	19,032	19,839
Prepaid expenses and other current assets	1,802	2,918
Total current assets	55,862	51,467
Property and equipment - net	54,323	54,832
Other noncurrent assets	1,716	1,659
Total assets	111,901	107,958
Current liabilities:
Current portion of long-term debt	141	138
Current portion of capital leases	82	82
Accounts payable	2,003	3,231
Accrued expenses and other current liabilities	5,336	6,410
Deferred revenue and customer prepayments	9,122	7,103
Total current liabilities	16,684	16,964
Long-term debt - net of current portion	1,707	1,812
Capital leases - net of current portion	24	81
Other noncurrent liabilities	9	28
Total liabilities	18,424	18,885
Contingencies and commitments
Stockholders' equity
Common stock, $0.01 par value, 200,000,000 shares authorized, 15,998,782 (2016) and 14,446,967 (2015) shares issued and outstanding	160	144
Additional paid-in capital	170,757	156,627
Accumulated deficit	(66,193)	(54,163)
Accumulated other comprehensive loss	(11,247)	(13,535)
Total stockholders' equity	93,477	89,073
Total liabilities and stockholders' equity	$ 111,901	$ 107,958

Condensed Consolidated Balance4

Condensed Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Statement Of Financial Position [Abstract]
Allowance for accounts receivable	$ 1,697	$ 1,920
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	15,998,782	14,446,967
Common stock, shares outstanding	15,998,782	14,446,967

Condensed Statement of Consoli5

Condensed Statement of Consolidated Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Operating activities
Net loss	$ (12,030)	$ (24,646)
Adjustments to reconcile net loss to cash used for operations:
Depreciation and amortization	4,280	3,819
Deferred income taxes	(29)	(269)
Equity-based compensation	1,104	1,244
(Recoveries) provision for bad debts	(256)	144
Loss from disposal of property and equipment	163	87
Amortization of debt issuance costs	204	0
Changes in fair value of contingent consideration	0	(193)
Goodwill impairment	0	4,419
Changes in assets and liabilities, excluding effects of foreign currency translation adjustments:
Decrease in accounts receivable	4,681	8,145
Decrease (increase) in inventories	43	(9,459)
Decrease in prepaid expenses and other assets	800	468
(Decrease) increase in accounts payable	(1,296)	850
Decrease in accrued expenses and other liabilities	(1,259)	(1,386)
Increase in deferred revenue and customer prepayments	1,687	5,770
Cash used for operating activities	(1,908)	(11,007)
Investing activities
Capital expenditures	(690)	(4,089)
Proceeds from sale of property and equipment	52	0
Increase in restricted cash	0	(330)
Cash used for investing activities	(638)	(4,419)
Financing activities
Net proceeds from issuance of common stock - Registered direct offering to a related party	12,447	0
Net proceeds from issuance of common stock - At the market offerings	595	0
Payments on long-term debt	(102)	(99)
Payments on capital and financing leases	(61)	(264)
Cash provided by (used for) financing activities	12,879	(363)
Effect of exchange rate changes on cash and cash equivalents	138	(160)
Net change in cash and cash equivalents	10,471	(15,949)
Cash and cash equivalents at beginning of period	19,342	36,202
Cash and cash equivalents at end of period	29,813	20,253
Supplemental disclosure of noncash investing and financing activities
Property and equipment included in accounts payable	15	344
Advance deposits on property and equipment	203	0
Transfer of internally developed 3D printing machines from inventories to property and equipment for internal use or leasing activities	2,666	3,495
Transfer of internally developed 3D printing machines from property and equipment to inventories for sale	$ 1,276	$ 149

Condensed Statement of Changes

Condensed Statement of Changes in Consolidated Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]
Beginning Balance at Dec. 31, 2014	$ 118,545	$ 144	$ 154,902	$ (28,298)	$ (8,203)
Beginning Balance, Shares at Dec. 31, 2014		14,417,000
Net loss	(24,646)			(24,646)
Other comprehensive income (loss)	(3,854)				(3,854)
Equity-based compensation	1,244		1,244
Common stock issued from equity incentive plan, shares		11,000
Ending Balance at Sep. 30, 2015	91,289	$ 144	156,146	(52,944)	(12,057)
Ending Balance, Shares at Sep. 30, 2015		14,428,000
Beginning Balance at Dec. 31, 2015	$ 89,073	$ 144	156,627	(54,163)	(13,535)
Beginning Balance, Shares at Dec. 31, 2015	14,446,967	14,447,000
Registered direct offering of common stock to a related party, net of issuance costs	$ 12,447	$ 15	12,432
Registered direct offering of common stock to a related party, net of issuance costs, Shares		1,424,000
At the market offerings of common stock, net of issuance costs	595	$ 1	594
At the market offerings of common stock, net of issuance costs, Shares		92,000
Net loss	(12,030)			(12,030)
Other comprehensive income (loss)	2,288				2,288
Equity-based compensation	1,104		1,104
Common stock issued from equity incentive plan, shares		36,000
Ending Balance at Sep. 30, 2016	$ 93,477	$ 160	$ 170,757	$ (66,193)	$ (11,247)
Ending Balance, Shares at Sep. 30, 2016	15,998,782	15,999,000

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2016
Accounting Policies [Abstract]
Basis of Presentation	Note 1. Basis of Presentation Organization The ExOne Company (“ExOne”) is a corporation organized under the laws of the state of Delaware. ExOne was formed on January 1, 2013, when The Ex One Company, LLC, a Delaware limited liability company, merged with and into a Delaware corporation, which survived and changed its name to The ExOne Company (the “Reorganization”). As a result of the Reorganization, The Ex One Company, LLC became ExOne, the common and preferred interest holders of The Ex One Company, LLC became holders of common stock and preferred stock, respectively, of ExOne, and the subsidiaries of The Ex One Company, LLC became the subsidiaries of ExOne. The condensed consolidated financial statements include the accounts of ExOne, its wholly-owned subsidiaries, ExOne Americas LLC (United States), ExOne GmbH (Germany), ExOne Property GmbH (Germany); ExOne KK (Japan); ExOne Italy S.r.l (Italy); effective in July 2015, ExOne Sweden AB (Sweden) and effective through September 2016, MWT—Gesellschaft für Industrielle Mikrowellentechnik mbH (Germany). Collectively, the consolidated group is referred to as the “Company”. On September 15, 2016, the Company completed a transaction merging its MWT—Gesellschaft für Industrielle Mikrowellentechnik mbH (Germany) subsidiary with and into its ExOne GmbH (Germany) subsidiary. The purpose of this transaction was to further simplify the Company’s legal structure. There were no significant accounting or tax related impacts associated with the merger of these wholly owned subsidiaries. The Company filed a registration statement on Form S-3 (No. 333-203353) Basis of Presentation The condensed consolidated financial statements of the Company are unaudited. The condensed consolidated financial statements include all adjustments, consisting of normal recurring adjustments, considered necessary by management to fairly state the results of operations, financial position and cash flows of the Company. All material intercompany transactions and balances have been eliminated in consolidation. The results reported in these condensed consolidated financial statements are not necessarily indicative of the results that may be expected for the entire year. The December 31, 2015 condensed consolidated balance sheet data was derived from the audited financial statements but does not include all disclosures required by accounting principles generally accepted in the United States of America (“GAAP”). This Quarterly Report on Form 10-Q should be read in connection with the Company’s Annual Report on Form 10-K for the year ended December 31, 2015, which includes all disclosures required by GAAP. Recently Issued Accounting Guidance The Company considers the applicability and impact of all Accounting Standard Updates (“ASUs”) as issued by the Financial Accounting Standards Board (“FASB”). Recently issued ASUs not listed below were assessed and determined to be either not applicable or are currently expected to have no impact on the consolidated financial statements of the Company. In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers.” This ASU created a comprehensive framework for all entities in all industries to apply in the determination of when to recognize revenue, and, therefore, supersedes virtually all existing revenue recognition requirements and guidance. This framework is expected to provide a consistent and comparable methodology for revenue recognition. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. To achieve this principle, an entity should apply the following steps: (i) identify the contract(s) with a customer, (ii) identify the performance obligations in the contract(s), (iii) determine the transaction price, (iv) allocate the transaction price to the performance obligations in the contract(s), and (v) recognize revenue when, or as, the entity satisfies a performance obligation. In August 2015, the FASB issued ASU 2015-14, “Revenue from Contracts with Customers: Deferral of the Effective Date,” which deferred the effective date of this guidance for the Company until January 1, 2019, or January 1, 2018, in the event that the Company no longer qualifies as an EGC. Early adoption is permitted, but the Company may adopt the changes no earlier than January 1, 2017 (regardless of EGC status). In March 2016, the FASB issued ASU 2016-08, “Revenue from Contracts with Customers: Principal versus Agent Considerations”, which serves to clarify the implementation guidance issued in ASU 2014-09 with respect to principal versus agent considerations in an arrangement. In April 2016, the FASB issued ASU 2016-10, “Revenue from Contracts with Customers: Identifying Performance Obligations and Licensing”, which serves to clarify the implementation guidance issued in ASU 2014-09 with respect to identifying performance obligations in an arrangement and accounting for licensing arrangements. In May 2016, the FASB issued ASU 2016-11, “Revenue Recognition and Derivatives and Hedging: Rescission of SEC Guidance Because of Accounting Standards Updates 2014-09 and 2014-16 Pursuant to Staff Announcements at the March 3, 2016 EITF Meeting”, which serves to rescind certain previously issued SEC Staff Observer comments upon adoption of ASU 2014-09. In May 2016, the FASB issued ASU 2016-12, “Revenue from Contracts with Customers: Narrow-Scope Improvements and Practical Expedients”, which serves to clarify certain technical aspects and transition guidance associated with ASU 2014-09. Management is currently evaluating the potential impact of these collective changes on the consolidated financial statements of the Company. In August 2014, the FASB issued ASU 2014-15, “Presentation of Financial Statements – Going Concern: Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern.” Under GAAP, continuation of a reporting entity as a going concern is presumed as the basis for preparing financial statements unless and until the entity’s liquidation becomes imminent. Even if an entity’s liquidation is not imminent, there may be conditions or events that raise substantial doubt about the entity’s ability to continue as a going concern. Because there is no guidance in GAAP about management’s responsibility to evaluate whether there is substantial doubt about an entity’s ability to continue as a going concern or to provide related note disclosures, there is diversity in practice whether, when, and how an entity discloses the relevant conditions and events in its financial statements. As a result, this ASU requires an entity’s management to evaluate whether there are conditions or events, considered in the aggregate, that raise substantial doubt about the entity’s ability to continue as a going concern within one year after the date that financial statements are issued. Substantial doubt is defined as an indication that it is probable that an entity will be unable to meet its obligations as they become due within one year after the date that financial statements are issued. If management has concluded that substantial doubt exists, then the following disclosures should be made in the financial statements: (i) principal conditions or events that raised the substantial doubt, (ii) management’s evaluation of the significance of those conditions or events in relation to the entity’s ability to meet its obligations, (iii) management’s plans that alleviated the initial substantial doubt or, if substantial doubt was not alleviated, management’s plans that are intended to at least mitigate the conditions or events that raise substantial doubt, and (iv) if the latter in (iii) is disclosed, an explicit statement that there is substantial doubt about the entity’s ability to continue as a going concern. This ASU becomes effective for the Company on December 31, 2016. Subsequent to adoption, this ASU will need to be applied by management at the end of each annual period and interim period therein to determine what, if any, impact there will be on the consolidated financial statements of the Company in a given reporting period. In April 2015, the FASB issued ASU 2015-03, “Interest – Imputation of Interest: Further, in August 2015, the FASB issued ASU 2015-15, “Interest – Imputation of Interest: This ASU requires an entity to present debt issuance costs in the balance sheet as a direct deduction from the related debt liability rather than as an asset, with an exception for line of credit arrangements. Amortization of debt issuance costs will continue to be reported as interest expense. This ASU becomes effective for the Company on December 31, 2016. Early adoption is permitted. The ASU will be applied retrospectively to each prior period presented. Management has determined that the adoption of this ASU will not have a significant impact on the consolidated financial statements of the Company In July 2015, the FASB issued ASU 2015-11, “Inventory: .” This ASU requires inventories to be measured at the lower of cost and net realizable value, with net realizable value defined as the estimated selling price in the normal course of business, less reasonably predictable costs of completion, disposal and transportation. This ASU becomes effective for the Company on January 1, 2017. Early adoption is permitted. The ASU will be applied prospectively in the interim or annual period adopted. Management has determined that the adoption of this ASU will not have an impact on the consolidated financial statements of the Company In February 2016, the FASB issued ASU 2016-02, “Leases.” As a result of this ASU, lessees will be required to recognize the following for all leases (with the exception of short-term leases) at the commencement date: (i) a lease liability, which is a lessee‘s obligation to make lease payments arising from a lease, measured on a discounted basis; and (ii) a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. As a result of this ASU, lessor accounting is largely unchanged and lessees will no longer be provided with a source of off-balance sheet financing. This ASU becomes effective for the Company on January 1, 2019. Early adoption is permitted. Lessees (for capital and operating leases) and lessors (for sales-type, direct financing, and operating leases) must apply a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the consolidated financial statements. The modified retrospective approach would not require any transition accounting for leases that expired before the earliest comparative period presented. Lessees and lessors may not apply a full retrospective transition approach. Management is currently evaluating the In March 2016, the FASB issued ASU 2016-09, “Compensation – Stock Compensation: Improvements to Employee Share-Based Payment Accounting.” This ASU simplifies certain aspects of accounting for equity-based compensation, including (i) accounting for income taxes, (ii) accounting for pre-vesting forfeitures and (iii) certain classification and disclosure elements. This ASU becomes effective for the Company on January 1, 2018. Early adoption is permitted. Management is currently evaluating the In August 2016, the FASB issued ASU 2016-15, “Statement of Cash Flows: Classification of Certain Cash Receipts and Cash Payments.” This ASU is intended to reduce diversity in practice in how certain cash receipts and payments are presented and classified in the statement of cash flows. The standard provides guidance in a number of situations including, among others, settlement of zero-coupon bonds, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, and distributions received from equity method investees. The ASU also provides guidance for classifying cash receipts and payments that have aspects of more than one class of cash flows. This ASU becomes effective for the Company on January 1, 2019. Early adoption is permitted. Management is currently evaluating the In October 2016, the FASB issued ASU 2016-16, “Income Taxes: Intra-Entity Transfers of Assets Other Than Inventory.” This ASU modifies existing guidance and is intended to reduce diversity in practice with respect to the accounting for the income tax consequences of intra-entity transfers of assets. The ASU indicates that the current exception to income tax accounting that requires companies to defer the income tax effects of certain intercompany transactions would apply only to intercompany inventory transactions. That is, the exception would no longer apply to intercompany sales and transfers of other assets (e.g., intangible assets). Under the existing exception, income tax expense associated with intra-entity profits in an intercompany sale or transfer of assets is eliminated from earnings. Instead, that cost is deferred and recorded on the balance sheet (e.g., as a prepaid asset) until the assets leave the consolidated group. Similarly, the entity is prohibited from recognizing deferred tax assets for the increases in tax bases due to the intercompany sale or transfer. This ASU becomes effective for the Company on January 1, 2019. Early adoption is permitted. Management is currently evaluating the In October 2016, the FASB issued ASU 2016-17, “Consolidation: Interests Held through Related Parties That Are under Common Control.” This ASU modifies existing guidance with respect to how a decision maker that holds an indirect interest in a variable interest entity (“VIE”) through a common control party determines whether it is the primary beneficiary of the VIE as part of the analysis of whether the VIE would need to be consolidated. Under the ASU, a decision maker would need to consider only its proportionate indirect interest in the VIE held through a common control party. Previous guidance had required the decision maker to treat the common control party’s interest in the VIE as if the decision maker held the interest itself. As a result of the ASU, in certain cases, previous consolidation conclusions may change. This ASU becomes effective for the Company on January 1, 2017, with retrospective application to January 1, 2016. The Company does not have significant involvement with entities subject to consolidation considerations impacted by VIE model factors. As a result, management does not expect this ASU to have a material impact on the consolidated financial statements of the Company.

Liquidity

Liquidity	9 Months Ended
	Sep. 30, 2016
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Liquidity	Note 2. Liquidity On February 6, 2013, the Company commenced an initial public offering of 6,095,000 shares of its common stock at a price to the public of $18.00 per share, of which 5,483,333 shares of common stock were sold by the Company and 611,667 shares of common stock were sold by a selling stockholder (including consideration of the exercise of the underwriters’ over-allotment option). Following completion of the offering on February 12, 2013, the Company received net proceeds of approximately $91,996 (net of underwriting commissions). On September 9, 2013, the Company commenced a secondary public offering of 3,054,400 shares of its common stock at a price to the public of $62.00 per share, of which 1,106,000 shares of common stock were sold by the Company and 1,948,400 shares of common stock were sold by selling stockholders (including consideration of the exercise of the underwriters’ over-allotment option). Following completion of the offering on September 13, 2013, the Company received net proceeds of approximately $65,315 (net of underwriting commissions). On January 8, 2016, the Company announced that it had entered into an At Market Issuance Sales Agreement (“ATM”) with FBR Capital Markets & Co. (“FBR”) and MLV & Co. LLC (“MLV”) pursuant to which FBR and MLV agreed to act as distribution agents in the sale of up to $50,000 in the aggregate of ExOne common stock in “at the market offerings” as defined in Rule 415 under the Securities Act of 1933, as amended (the “Securities Act”). The Company’s ongoing ability to issue and sell shares of common stock under the ATM is dependent on its ability to use its shelf Registration Statement on Form S-3 (the “Shelf”), as filed on April 10, 2015. As a result of the Company’s delinquent filing of its Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2015, the Company’s offerings and sales under the Shelf (and therefore the ATM) were suspended. On August 18, 2016, the Company filed a post-effective amendment to its Shelf. As a result of the post-effective amendment filing, the Company is now eligible to re-activate the ATM. On January 11, 2016, the Company announced that it had entered into a subscription agreement with Rockwell Forest Products, Inc. and S. Kent Rockwell for the registered direct offering and sale of 1,423,877 shares of ExOne common stock at a per share price of $9.13 (a $0.50 premium from the closing price on the close of business on January 8, 2016). The terms of this transaction were reviewed and approved by a sub-committee of independent members of the Board of Directors of the Company (which included each of the members of the Audit Committee of the Board of Directors). The sub-committee of independent members of the Board of Directors of the Company were advised on the transaction by an independent financial advisor and independent legal counsel. Concurrent with the approval of this sale of common stock under the terms identified, a separate sub-committee of independent members of the Board of Directors of the Company approved the termination of the Company’s revolving credit facility with RHI Investments, LLC. Following completion of the registered direct offering on January 13, 2016, the Company received gross proceeds of approximately $13,000. Net proceeds to the Company from the sale of common stock in the registered direct offering were approximately $12,447 (after deducting offering costs of approximately $553). The Company has incurred a net loss in each of its annual periods since its inception. As shown in the accompanying condensed statement of consolidated operations and comprehensive loss, the Company incurred a net loss of approximately $3,611 and $12,030 for the quarter and nine months ended September 30, 2016, respectively. As noted above, the Company has received cumulative unrestricted net proceeds from the sale of its common stock of approximately $170,353 to fund its operations. At September 30, 2016, the Company had approximately $29,813 in cash and cash equivalents. Management believes that the Company’s existing capital resources will be sufficient to support the Company’s operating plan. If management anticipates that the Company’s actual results will differ from its operating plan, management believes it has sufficient capabilities to enact cost savings measures to preserve capital. Further, the Company may seek to raise additional capital to support its growth through additional debt, equity or other alternatives or a combination thereof.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	9 Months Ended
	Sep. 30, 2016
Equity [Abstract]
Accumulated Other Comprehensive Loss	Note 3. Accumulated Other Comprehensive Loss The following table summarizes changes in the components of accumulated other comprehensive loss: Quarter Ended Nine Months Ended September 30, September 30, Foreign currency translation adjustments 2016 2015 2016 2015 Balance at beginning of period $ (11,736 ) $ (12,866 ) $ (13,535 ) $ (8,203 ) Other comprehensive income (loss) 489 809 2,288 (3,854 ) Balance at end of period $ (11,247 ) $ (12,057 ) $ (11,247 ) $ (12,057 ) Foreign currency translation adjustments consist of (i) the effect of translation of functional currency financial statements (denominated in the Euro and Japanese Yen) to the reporting currency of the Company (United States dollar) and (ii) certain long-term intercompany transactions between subsidiaries for which settlement is not planned or anticipated in the foreseeable future. There were no tax impacts related to income tax rate changes and no amounts were reclassified to earnings for either of the periods presented.

Loss Per Share

Loss Per Share	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Loss Per Share	Note 4. Loss Per Share The Company presents basic and diluted net loss per common share amounts. Basic net loss per share is calculated by dividing net loss available to common shareholders by the weighted average number of common shares outstanding during the applicable period. Diluted net loss per share is calculated by dividing net loss available to common shareholders by the weighted average number of common shares and common equivalent shares outstanding during the applicable period. As the Company incurred a net loss during each of the quarters and nine months ended September 30, 2016 and 2015, basic average shares outstanding and diluted average shares outstanding were the same because the effect of potential shares of common stock, including incentive stock options (317,637 – 2016 and 204,470 – 2015) and unvested restricted stock issued (112,504 – 2016 and 96,003 – 2015), was anti-dilutive. The information used to compute basic and diluted net loss per common share was as follows: Quarter Ended Nine Months Ended September 30, September 30, 2016 2015 2016 2015 Net loss $ (3,611 ) $ (10,077 ) $ (12,030 ) $ (24,646 ) Weighted average shares outstanding (basic and diluted) 15,997,146 14,428,634 15,912,628 14,426,855 Net loss per common share: Basic $ (0.23 ) $ (0.70 ) $ (0.76 ) $ (1.71 ) Diluted $ (0.23 ) $ (0.70 ) $ (0.76 ) $ (1.71 )

Inventories

Inventories	9 Months Ended
	Sep. 30, 2016
Inventory Disclosure [Abstract]
Inventories	Note 5. Inventories Inventories consist of the following: September 30, December 31, 2016 2015 Raw materials and components $ 8,931 $ 9,467 Work in process 5,855 6,048 Finished goods 4,246 4,324 $ 19,032 $ 19,839 Raw materials and components consist of (i) consumable materials and (ii) component parts and subassemblies associated with 3D printing machine manufacturing and support activities. Work in process consists of 3D printing machines and other products in varying stages of completion. Finished goods consist of 3D printing machines and other products prepared for delivery in accordance with customer specifications. At September 30, 2016 and December 31, 2015, the allowance for slow-moving and obsolete inventories was approximately $1,583 and $1,909, respectively, and has been reflected as a reduction to inventories (principally raw materials and components). Included in the allowance for slow-moving and obsolete inventories at December 31, 2015, is approximately $507 associated with the Company’s laser micromachining product line which was discontinued at the end of 2014. During the quarter ended June 30, 2016, the Company sold its remaining laser micromachining inventories, eliminating the previously recorded reserve.

Restructuring

Restructuring	9 Months Ended
	Sep. 30, 2016
Restructuring And Related Activities [Abstract]
Restructuring	Note 6. Restructuring In April 2016, the Company committed to a plan to consolidate certain of its 3D printing operations in its Auburn, Washington facility into its North Las Vegas, Nevada facility and reorganize certain of its corporate departments as part of its 2016 operating plan. As a result of these actions, during the quarter ended June 30, 2016, the Company incurred a net charge of approximately $170 including, $57 associated with involuntary employee terminations and $113 associated with the disposal of certain property and equipment related to the Auburn, Washington facility which was either sold or abandoned. This net charge was split between cost of sales ($129), research and development ($2) and selling, general and administrative expenses ($39) in the accompanying condensed statement of consolidated operations and comprehensive loss. In addition to the net charge incurred by the Company in connection with this plan, the Company also has an operating lease commitment for the Auburn, Washington facility with a lease term through December 2018. At the time of closure of this facility, the Company was able to secure a firmly committed sublease arrangement with a third party which fully offsets its remaining contractual operating lease liability. There are no additional charges expected to be incurred associated with this plan in future periods. All amounts associated with involuntary employee terminations have been settled by the Company.

Impairment

Impairment	9 Months Ended
	Sep. 30, 2016
Asset Impairment Charges [Abstract]
Impairment	Note 7. Impairment During the quarter ended September 30, 2016, as a result of continued operating losses and cash flow deficiencies, the Company identified a triggering event requiring a test for the recoverability of long-lived assets held for use at the asset group level. Assessing the recoverability of long-lived assets held for use requires significant judgments and estimates by management. For purposes of testing long-lived assets for recoverability, the Company operates as three separate asset groups: United States, Europe and Japan. In assessing the recoverability of long-lived assets held for use, the Company determined the carrying amount of long-lived assets held for use to be in excess of the estimated future undiscounted net cash flows of the related assets. The Company proceeded to determine the fair value of its long-lived assets held for use, principally through use of the market approach. The Company’s use of the market approach included consideration of market transactions for comparable assets. Management concluded that the fair value of long-lived assets held for use exceeded their carrying value and as such no impairment loss was recorded . A significant decrease in the market price of a long-lived asset, adverse change in the use or condition of a long-lived asset, adverse change in the business climate or legal or regulatory factors impacting a long-lived asset and continued operating losses and cash flow deficiencies associated with a long-lived asset, among other indicators, could cause a future assessment to be performed which may result in an impairment of long-lived assets held for use, resulting in a material adverse effect on the financial position and results of operations of the Company. During the quarter ended September 30, 2015, as a result of the significant decline in the market capitalization of the Company and continued operating losses and cash flow deficiencies, the Company identified a triggering event requiring both (i) a test for the recoverability of long-lived assets held for use at the asset group level and (ii) a test for impairment of goodwill at the reporting unit level. Assessing the recoverability of long-lived assets held for use and goodwill requires significant judgments and estimates by management. In assessing the recoverability of long-lived assets held for use, the Company determined the carrying amount of long-lived assets held for use to be in excess of the estimated future undiscounted net cash flows of the related assets. The Company proceeded to determine the fair value of its long-lived assets held for use, principally through use of the market approach. The Company’s use of the market approach included consideration of market transactions for comparable assets. Management concluded that the fair value of long-lived assets held for use exceeded their carrying value and as such no impairment loss was recorded . The Company subsequently performed an impairment test for goodwill. For purposes of testing goodwill for impairment, the Company operates as a singular reporting unit. In assessing goodwill for impairment, the Company compared the fair value of its reporting unit to its carrying value. The Company determined the fair value of its reporting unit through a combination of the market approach and income approach. The Company’s use of the market approach included consideration of the Company’s market capitalization along with consideration of other factors that could influence the use of market capitalization as a fair value estimate, including premiums or discounts to be applied based on both market and entity-specific data. The Company’s use of the income approach included consideration of present value techniques, principally the use of a discounted cash flow model. In performing the impairment test for goodwill, the Company determined the carrying amount of goodwill to be in excess of the implied fair value of goodwill. As a result, the Company recognized an impairment loss of approximately $4,419 associated with goodwill during the quarter ended September 30, 2015.

Contingencies and Commitments

Contingencies and Commitments	9 Months Ended
	Sep. 30, 2016
Commitments And Contingencies Disclosure [Abstract]
Contingencies and Commitments	Note 8. Contingencies and Commitments The Company and its subsidiaries are subject to various litigation, claims, and proceedings which have been or may be instituted or asserted from time to time in the ordinary course of business. Management does not believe that the outcome of any pending or threatened matters will have a material adverse effect, individually or in the aggregate, on the financial position, results of operations or cash flows of the Company. In the course of its normal operations, ExOne GmbH issues guarantees and letters of credit to third parties in connection with certain commercial transactions requiring security. ExOne GmbH maintains a credit facility agreement with a German bank which provides for various short-term financings in the form of overdraft credit, guarantees, letters of credit and collateral security for commercial transactions for approximately $1,500. In addition, ExOne GmbH may use the credit facility agreement for short-term, fixed-rate loans in minimum increments of approximately $100 with minimum terms of at least thirty days. The overdraft credit interest rate is fixed at 10.2% while the interest rate associated with commercial transactions requiring security (guarantees, letters of credit or collateral security) is fixed at 1.75%. The credit facility agreement has an indefinite term and is subject to cancellation by either party at any time upon repayment of amounts outstanding or expiration of commercial transactions requiring security. There is no commitment fee associated with the credit facility agreement. There are no negative covenants associated with the credit facility agreement. The credit facility agreement has been guaranteed by the Company. At September 30, 2016 and December 31, 2015, there were no outstanding borrowings in the form of overdraft credit or short-term loans under the credit facility agreement

Equity-Based Compensation

Equity-Based Compensation	9 Months Ended
	Sep. 30, 2016
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Equity-Based Compensation	Note 9. Equity-Based Compensation On January 24, 2013, the Board of Directors of the Company adopted the 2013 Equity Incentive Plan (the “Plan”). In connection with the adoption of the Plan, 500,000 shares of common stock were reserved for issuance pursuant to the Plan, with automatic increases in such reserve available each year annually on January 1 from 2014 through 2023 equal to the lesser of (i) 3.0% of the total outstanding shares of common stock as of December 31 of the immediately preceding year or (ii) a number of shares of common stock determined by the Board of Directors, provided that the maximum number of shares authorized under the Plan will not exceed 1,992,241 shares, subject to certain adjustments. The following table summarizes the total equity-based compensation expense recognized for awards issued under the Plan: Quarter Ended Nine Months Ended September 30, September 30, 2016 2015 2016 2015 Equity-based compensation expense recognized: Incentive stock options $ 347 $ 185 $ 490 $ 566 Restricted stock 203 237 614 678 Total equity-based compensation expense before income taxes 550 422 1,104 1,244 Benefit for income taxes* — — — — Total equity-based compensation expense net of income taxes $ 550 $ 422 $ 1,104 $ 1,244 * The benefit for income taxes from equity-based compensation for each of the periods presented has been determined to be $0 based on valuation allowances against net deferred tax assets. At September 30, 2016, total future compensation expense related to unvested awards yet to be recognized by the Company was approximately $1,000 for incentive stock options (“ISOs”) and $1,110 for restricted stock. Total future compensation expense related to unvested awards yet to be recognized by the Company is expected to be recognized over a weighted-average remaining vesting period of approximately 2.0 years. On August 12, 2016, the Company issued 39,000 ISOs to certain members of management. Each of the ISOs issued vests in one-third increments on the first, second and third anniversaries of the date of grant. Separately, on August 19, 2016, the Company issued 100,000 ISOs to the newly appointed CEO of the Company. For the August 19, 2016, issuance, one-third of the ISOs issued vested immediately. The remaining two-thirds vests on the first and second anniversaries of the date of grant. The fair value of ISOs issued was estimated on the respective dates of grant using the Black-Scholes option pricing model with the following assumptions: August 19, 2016 August 12, 2016 Weighted average fair value per ISO $ 7.97 $ 8.07 Volatility 66.24 % 66.43 % Average risk-free interest rate 1.20 % 1.18 % Dividend yield 0.00 % 0.00 % Expected term (years) 5.5 6.0 Expected volatility has been estimated based on historical volatilities of certain peer group companies over the expected term of the awards, due to a lack of historical stock prices for a period at least equal to the expected term of issued awards. The average risk-free rate is based on a weighted average yield curve of risk-free interest rates consistent with the expected term of the awards. Expected dividend yield is based on historical dividend data as well as future expectations. Expected term has been calculated using the simplified method as the Company does not have sufficient historical exercise experience upon which to base an estimate. The activity for ISOs was as follows: Nine Months Ended September 30, 2016 2015 Number ISOs Weighted Weighted Average Grant Date Fair Value Number ISOs Weighted Weighted Average Grant Date Fair Value Outstanding at beginning of period 210,970 $ 17.43 $ 10.67 215,137 $ 17.35 $ 10.62 ISOs granted 139,000 $ 13.72 $ 8.00 — $ — $ — ISOs exercised — $ — $ — — $ — $ — ISOs forfeited (6,001 ) $ 15.74 $ 9.60 (9,834 ) $ 17.08 $ 10.45 ISOs expired (26,332 ) $ 17.74 $ 10.87 (833 ) $ 18.00 $ 11.03 Outstanding at end of period 317,637 $ 15.77 $ 9.48 204,470 $ 17.43 $ 10.67 ISOs exercisable at end of period 178,304 $ 17.01 $ 10.32 95,639 $ 18.00 $ 11.03 ISOs expected to vest at end of period 132,908 $ 14.18 $ 8.38 100,128 $ 16.85 $ 10.30 At September 30, 2016, the aggregate intrinsic value associated with ISOs exercisable was approximately $47. At September 30, 2016, the aggregate intrinsic value associated with ISOs expected to vest was approximately $155. The weighted average remaining contractual term of ISOs exercisable and expected to vest at September 30, 2016, was approximately 7.4 years and 9.5 years, respectively. There were no ISO exercises during any of the periods presented. The activity for restricted stock was as follows: Nine Months Ended September 30, 2016 2015 Shares of Restricted Stock Weighted Average Grant Date Fair Value Shares of Restricted Stock Weighted Average Grant Date Fair Value Outstanding at beginning of period 77,670 $ 19.57 80,834 $ 22.78 Restricted stock granted 74,500 $ 11.78 26,000 $ 13.23 Restricted stock vested (35,998 ) $ 19.25 (10,831 ) $ 34.80 Restricted stock forfeited (3,668 ) $ 19.46 — $ — Outstanding at end of period 112,504 $ 14.52 96,003 $ 18.84 Restricted stock expected to vest at end of period 112,504 $ 14.52 96,003 $ 18.84 * Restricted stock vesting during the nine months ended September 30, 2016 and 2015, had a fair value of approximately $351 and $158, respectively.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Note 10. Income Taxes The provision (benefit) for income taxes for the quarters ended September 30, 2016 and 2015 was $25 and ($41), respectively. The provision (benefit) for income taxes for the nine months ended September 30, 2016 and 2015 was $43 and ($200), respectively. The Company has completed a discrete period computation of its benefit for income taxes for each of the periods presented. Discrete period computation is as a result of (i) jurisdictions with losses before income taxes for which no tax benefit can be recognized and (ii) an inability to generate reliable estimates for results in certain jurisdictions as a result of inconsistencies in generating net operating profits (losses) in those jurisdictions. The effective tax rate for the quarters ended September 30, 2016 and 2015 was 0.7% (provision on a loss) and 0.4% (benefit on a loss), respectively. The effective tax rate for the nine months ended September 30, 2016 and 2015 was 0.4% (provision on a loss) and 0.8% (benefit on a loss), respectively. The effective tax rate differs from the United States federal statutory rate of 34.0% for each of the periods presented primarily due to net changes in valuation allowances for the periods. The Company has provided a valuation allowance for its net deferred tax assets as a result of the Company not generating consistent net operating profits in jurisdictions in which it operates. As such, any benefit from deferred taxes in either quarterly period has been fully offset by changes in the valuation allowance for net deferred tax assets. The Company continues to assess its future taxable income by jurisdiction based on (i) recent historical operating results, (ii) the expected timing of reversal of temporary differences, (iii) various tax planning strategies that the Company may be able to enact in future periods, (iv) the impact of potential operating changes on the business and (v) forecast results from operations in future periods based on available information at the end of each reporting period. To the extent that the Company is able to reach the conclusion that deferred tax assets are realizable based on any combination of the above factors, a reversal of existing valuation allowances may occur. The Company has a liability for uncertain tax positions related to certain capitalized expenses and intercompany transactions. At September 30, 2016 and December 31, 2015, the liability for uncertain tax positions was approximately $803 and $781, respectively, and is included in accrued expenses and other current liabilities in the accompanying condensed consolidated balance sheet. At September 30, 2016 and December 31, 2015, the Company had an additional liability for uncertain tax positions related to its ExOne GmbH (Germany) subsidiary of approximately $234 and $195, respectively, which were fully offset against net operating loss carryforwards. At September 30, 2016 and December 31, 2015, the Company had an additional liability for uncertain tax positions related to its ExOne KK (Japan) subsidiary of approximately $471 and $285, respectively, which were fully offset against net operating loss carryforwards. At September 30, 2016, the Company’s ExOne GmbH (2010-2013) and ExOne Property GmbH (2013) subsidiaries were under examination by tax authorities.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 11. Fair Value Measurements Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities which are required to be recorded at fair value, the Company considers the principal or most advantageous market in which the Company would transact and the market-based risk measurements or assumptions that market participants would use in pricing the asset or liability, such as inherent risk, transfer restrictions and credit risk. The Company applies the following fair value hierarchy, which prioritizes the inputs used to measure fair value into three levels and bases the categorization within the hierarchy upon the lowest level of input that is available and significant to the fair value measurement: Level 1 Observable inputs such as quoted prices in active markets for identical investments that the Company has the ability to access. Level 2 Inputs include: Quoted prices for similar assets or liabilities in active markets; Quoted prices for identical or similar assets or liabilities in inactive markets; Inputs, other than quoted prices in active markets, that are observable either directly or indirectly; and Inputs that are derived principally from, or corroborated by, observable market data by correlation or other means. Level 3 Inputs that are generally unobservable and typically reflect management’s estimates of assumptions that market participants would use in pricing the asset or liability. The Company is required to disclose its estimate of the fair value of material financial instruments, including those recorded as assets or liabilities in its consolidated financial statements, in accordance with GAAP. At September 30, 2016 and December 31, 2015, the Company had no financial instruments (assets or liabilities) measured at fair value on a recurring basis. The carrying values and fair values of other financial instruments (assets and liabilities) not required to be recorded at fair value were as follows: September 30, December 31, 2016 2015 Carrying Value Fair Value Carrying Value Fair Value Cash and cash equivalents $ 29,813 $ 29,813 $ 19,342 $ 19,342 Current portion of long-term debt $ 141 $ 141 $ 138 $ 138 Current portion of capital leases $ 82 $ 82 $ 82 $ 82 Long-term debt - net of current portion $ 1,707 $ 1,707 $ 1,812 $ 1,800 Capital leases - net of current portion $ 24 $ 24 $ 81 $ 81 The carrying amounts of cash and cash equivalents, current portion of long-term debt and current portion of capital leases approximate fair value due to their short-term maturities. The fair value of long-term debt – net of current portion and capital leases – net of current portion have been estimated by management based on the consideration of applicable interest rates (including certain instruments at variable or floating rates) and other available information (including quoted prices of similar instruments available to the Company). Cash and cash equivalents are classified in Level 1; current portion of long-term debt, current portion of capital and financing leases, long-term debt – net of current portion and capital and financing leases – net of current portion are classified in Level 2.

Concentration of Credit Risk

Concentration of Credit Risk	9 Months Ended
	Sep. 30, 2016
Risks And Uncertainties [Abstract]
Concentration of Credit Risk	Note 12. Concentration of Credit Risk During the quarters and nine months ended September 30, 2016 and 2015, the Company conducted a significant portion of its business with a limited number of customers, though not necessarily the same customers for each respective period. For the quarters ended September 30, 2016 and 2015, the Company’s five most significant customers represented approximately 36.0% and 34.6% of total revenue, respectively. For the nine months ended September 30, 2016 and 2015, the Company’s five most significant customers represented approximately 21.4% and 22.1% of total revenue, respectively. At September 30, 2016 and December 31, 2015, accounts receivable from the Company’s five most significant customers were approximately $1,400 and $4,808, respectively.

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2016
Related Party Transactions [Abstract]
Related Party Transactions	Note 13. Related Party Transactions Revolving Credit Facility with a Related Party On October 23, 2015, ExOne and its ExOne Americas LLC and ExOne GmbH subsidiaries, as guarantors, entered into a Credit Agreement (the “Credit Agreement”) with RHI Investments, LLC (“RHI”), a related party, on a $15,000 revolving credit facility to (i) assist the Company in its efforts to finance customer acquisition of its 3D printing machines and 3D printed and other products and services and (ii) provide additional funding for working capital and general corporate purposes. RHI was determined to be a related party based on common control by the Chairman of the Board of Directors of the Company (also the CEO of the Company through August 19, 2016) On January 10, 2016, the Company delivered notice to RHI of its intent to terminate the Credit Agreement in connection with the closing of a registered direct offering of common stock to an entity under common control by the (also the CEO of the Company through August 19, 2016) . There were no borrowings under the Credit Agreement from January 1, 2016 through the effective date of its termination, January 13, 2016. In connection with the termination, the Company settled its remaining accrued interest under the Credit Agreement of approximately $5 relating to the commitment fee on the unused portion of the revolving credit facility . In addition, during the quarter ended March 31, 2016, the Company recorded approximately $204 to interest expense related to the accelerated amortization of debt issuance costs. Upon termination of the Credit Agreement, all liens and guaranties in respect thereof were released. Other Refer to Note 2 for further discussion relating to two separate equity offerings during the quarter ended March 31, 2016, certain elements of which qualify as related party transactions. Revenues Sales of products and/or services to related parties for the quarters ended September 30, 2016 and 2015 were approximately $1 and $152, respectively. Sales of products and/or services to related parties for the nine months ended September 30, 2016 and 2015 were approximately $73 and $1,294, respectively. In December 2014, the Company entered into a sale agreement for a 3D printing machine with a powdered metal company with proprietary powders determined to be a related entity based on common control by the Chairman of the Board of Directors of the Company (also the CEO of the Company through August 19, 2016) In March 2015, the Company entered into a separate sale agreement for a 3D printing machine with the same related entity described above. Total consideration for the 3D printing machine (approximately $950) was determined to represent a fair market value selling price (based on comparable 3D printing machine sales to third parties) and was approved prior to execution by the Audit Committee of the Board of Directors of the Company. During the quarter and nine months ended September 30, 2015, the Company recorded revenue of approximately $47 and $913, respectively, based on the delivery of products and/or services. In June 2015, the Company entered into a sale agreement for a 3D printing machine with a multi-national, diversified metals company determined to be a related entity on the basis that a member of the Board of Directors of the Company also receives his principal compensation from the entity. Total consideration for the 3D printing machine (approximately $146) was determined to represent a fair market value selling price (based on comparable 3D printing machine sales to third parties) and was approved prior to execution by the Audit Committee of the Board of Directors of the Company. During the quarter and nine months ended September 30, 2015, the Company recorded revenue of approximately $5 and $146, respectively, based on the delivery of products and/or services. Amounts due from related parties at September 30, 2016 and December 31, 2015, were approximately $1 and $151, respectively and are reflected in accounts receivable – net, in the accompanying condensed consolidated balance sheet. At December 31, 2015, the Company continued to defer approximately $17 of consideration associated with sales to related parties for which products and/or services remained undelivered to the customer, with such amounts reflected in deferred revenue and customer prepayments in the accompanying condensed consolidated balance sheet. Such amounts were recognized as part of revenues during the quarter ended June 30, 2016 based on the delivery of products and/or services. Expenses In December 2014, the Company entered into a consulting arrangement with Hans J. Sack who was subsequently appointed to the Board of Directors of the Company on December 17, 2014. Total consideration under the consulting arrangement was approximately $75, of which approximately $50 was included in selling, general and administrative expenses in the accompanying condensed statement of consolidated operations and comprehensive loss during the quarter ended March 31, 2015, based on the services rendered (the remaining amount having been recorded by the Company during the quarter ended December 31, 2014). This arrangement was approved by the Audit Committee of the Board of Directors of the Company in connection with the appointment of Hans J. Sack to the Board of Directors of the Company. In March 2015, Hans J. Sack resigned from the Board of Directors of the Company to accept a position as President of the Company. Separate from the consulting arrangement further described above, the Company has purchased website design services and the corporate use of an airplane and leased office space from related parties under common control by the Chairman of the Board of Directors of the Company (also the CEO of the Company through August 19, 2016). The cost of these products and/or services for the quarters ended September 30, 2016 and 2015 were approximately $3 and $6, respectively. The cost of these products and/or services for the nine months ended September 30, 2016 and 2015 were approximately $13 and $21, respectively. None of the transactions met a threshold requiring review and approval by the Audit Committee of the Board of Directors of the Company. Amounts due to related parties at September 30, 2016, were approximately $1 and are reflected in accounts payable in the accompanying condensed consolidated balance sheet. Amounts due to related parties at December 31, 2015, were approximately $15 of which approximately $1 and $14 are reflected in accounts payable and accrued expenses and other current liabilities, respectively, in the accompanying condensed consolidated balance sheet. The Company also receives the benefit of the corporate use of an airplane from a related party under common control by the Chairman of the Board of Directors of the Company (also the CEO of the Company through August 19, 2016) for no consideration. The Company estimates the fair market value of the benefits received during the quarter ended September 30, 2016 was approximately $17. There were no such benefits received by the Company during the quarter ended September 30, 2015. The Company estimates the fair market value of the benefits received during the nine months ended September 30, 2016 and 2015 were approximately $21 and $22, respectively.

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2016
Subsequent Events [Abstract]
Subsequent Events	Note 14. Subsequent Events The Company has evaluated all of its activities and concluded that no subsequent events have occurred that would require recognition in the condensed consolidated financial statements or disclosure in the notes to the condensed consolidated financial statements.

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2016
Accounting Policies [Abstract]
Organization	Organization The ExOne Company (“ExOne”) is a corporation organized under the laws of the state of Delaware. ExOne was formed on January 1, 2013, when The Ex One Company, LLC, a Delaware limited liability company, merged with and into a Delaware corporation, which survived and changed its name to The ExOne Company (the “Reorganization”). As a result of the Reorganization, The Ex One Company, LLC became ExOne, the common and preferred interest holders of The Ex One Company, LLC became holders of common stock and preferred stock, respectively, of ExOne, and the subsidiaries of The Ex One Company, LLC became the subsidiaries of ExOne. The condensed consolidated financial statements include the accounts of ExOne, its wholly-owned subsidiaries, ExOne Americas LLC (United States), ExOne GmbH (Germany), ExOne Property GmbH (Germany); ExOne KK (Japan); ExOne Italy S.r.l (Italy); effective in July 2015, ExOne Sweden AB (Sweden) and effective through September 2016, MWT—Gesellschaft für Industrielle Mikrowellentechnik mbH (Germany). Collectively, the consolidated group is referred to as the “Company”. On September 15, 2016, the Company completed a transaction merging its MWT—Gesellschaft für Industrielle Mikrowellentechnik mbH (Germany) subsidiary with and into its ExOne GmbH (Germany) subsidiary. The purpose of this transaction was to further simplify the Company’s legal structure. There were no significant accounting or tax related impacts associated with the merger of these wholly owned subsidiaries. The Company filed a registration statement on Form S-3 (No. 333-203353) Basis of Presentation The condensed consolidated financial statements of the Company are unaudited. The condensed consolidated financial statements include all adjustments, consisting of normal recurring adjustments, considered necessary by management to fairly state the results of operations, financial position and cash flows of the Company. All material intercompany transactions and balances have been eliminated in consolidation. The results reported in these condensed consolidated financial statements are not necessarily indicative of the results that may be expected for the entire year. The December 31, 2015 condensed consolidated balance sheet data was derived from the audited financial statements but does not include all disclosures required by accounting principles generally accepted in the United States of America (“GAAP”). This Quarterly Report on Form 10-Q should be read in connection with the Company’s Annual Report on Form 10-K for the year ended December 31, 2015, which includes all disclosures required by GAAP.
Recently Issued Accounting Guidance	Recently Issued Accounting Guidance The Company considers the applicability and impact of all Accounting Standard Updates (“ASUs”) as issued by the Financial Accounting Standards Board (“FASB”). Recently issued ASUs not listed below were assessed and determined to be either not applicable or are currently expected to have no impact on the consolidated financial statements of the Company. In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers.” This ASU created a comprehensive framework for all entities in all industries to apply in the determination of when to recognize revenue, and, therefore, supersedes virtually all existing revenue recognition requirements and guidance. This framework is expected to provide a consistent and comparable methodology for revenue recognition. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. To achieve this principle, an entity should apply the following steps: (i) identify the contract(s) with a customer, (ii) identify the performance obligations in the contract(s), (iii) determine the transaction price, (iv) allocate the transaction price to the performance obligations in the contract(s), and (v) recognize revenue when, or as, the entity satisfies a performance obligation. In August 2015, the FASB issued ASU 2015-14, “Revenue from Contracts with Customers: Deferral of the Effective Date,” which deferred the effective date of this guidance for the Company until January 1, 2019, or January 1, 2018, in the event that the Company no longer qualifies as an EGC. Early adoption is permitted, but the Company may adopt the changes no earlier than January 1, 2017 (regardless of EGC status). In March 2016, the FASB issued ASU 2016-08, “Revenue from Contracts with Customers: Principal versus Agent Considerations”, which serves to clarify the implementation guidance issued in ASU 2014-09 with respect to principal versus agent considerations in an arrangement. In April 2016, the FASB issued ASU 2016-10, “Revenue from Contracts with Customers: Identifying Performance Obligations and Licensing”, which serves to clarify the implementation guidance issued in ASU 2014-09 with respect to identifying performance obligations in an arrangement and accounting for licensing arrangements. In May 2016, the FASB issued ASU 2016-11, “Revenue Recognition and Derivatives and Hedging: Rescission of SEC Guidance Because of Accounting Standards Updates 2014-09 and 2014-16 Pursuant to Staff Announcements at the March 3, 2016 EITF Meeting”, which serves to rescind certain previously issued SEC Staff Observer comments upon adoption of ASU 2014-09. In May 2016, the FASB issued ASU 2016-12, “Revenue from Contracts with Customers: Narrow-Scope Improvements and Practical Expedients”, which serves to clarify certain technical aspects and transition guidance associated with ASU 2014-09. Management is currently evaluating the potential impact of these collective changes on the consolidated financial statements of the Company. In August 2014, the FASB issued ASU 2014-15, “Presentation of Financial Statements – Going Concern: Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern.” Under GAAP, continuation of a reporting entity as a going concern is presumed as the basis for preparing financial statements unless and until the entity’s liquidation becomes imminent. Even if an entity’s liquidation is not imminent, there may be conditions or events that raise substantial doubt about the entity’s ability to continue as a going concern. Because there is no guidance in GAAP about management’s responsibility to evaluate whether there is substantial doubt about an entity’s ability to continue as a going concern or to provide related note disclosures, there is diversity in practice whether, when, and how an entity discloses the relevant conditions and events in its financial statements. As a result, this ASU requires an entity’s management to evaluate whether there are conditions or events, considered in the aggregate, that raise substantial doubt about the entity’s ability to continue as a going concern within one year after the date that financial statements are issued. Substantial doubt is defined as an indication that it is probable that an entity will be unable to meet its obligations as they become due within one year after the date that financial statements are issued. If management has concluded that substantial doubt exists, then the following disclosures should be made in the financial statements: (i) principal conditions or events that raised the substantial doubt, (ii) management’s evaluation of the significance of those conditions or events in relation to the entity’s ability to meet its obligations, (iii) management’s plans that alleviated the initial substantial doubt or, if substantial doubt was not alleviated, management’s plans that are intended to at least mitigate the conditions or events that raise substantial doubt, and (iv) if the latter in (iii) is disclosed, an explicit statement that there is substantial doubt about the entity’s ability to continue as a going concern. This ASU becomes effective for the Company on December 31, 2016. Subsequent to adoption, this ASU will need to be applied by management at the end of each annual period and interim period therein to determine what, if any, impact there will be on the consolidated financial statements of the Company in a given reporting period. In April 2015, the FASB issued ASU 2015-03, “Interest – Imputation of Interest: Further, in August 2015, the FASB issued ASU 2015-15, “Interest – Imputation of Interest: This ASU requires an entity to present debt issuance costs in the balance sheet as a direct deduction from the related debt liability rather than as an asset, with an exception for line of credit arrangements. Amortization of debt issuance costs will continue to be reported as interest expense. This ASU becomes effective for the Company on December 31, 2016. Early adoption is permitted. The ASU will be applied retrospectively to each prior period presented. Management has determined that the adoption of this ASU will not have a significant impact on the consolidated financial statements of the Company In July 2015, the FASB issued ASU 2015-11, “Inventory: .” This ASU requires inventories to be measured at the lower of cost and net realizable value, with net realizable value defined as the estimated selling price in the normal course of business, less reasonably predictable costs of completion, disposal and transportation. This ASU becomes effective for the Company on January 1, 2017. Early adoption is permitted. The ASU will be applied prospectively in the interim or annual period adopted. Management has determined that the adoption of this ASU will not have an impact on the consolidated financial statements of the Company In February 2016, the FASB issued ASU 2016-02, “Leases.” As a result of this ASU, lessees will be required to recognize the following for all leases (with the exception of short-term leases) at the commencement date: (i) a lease liability, which is a lessee‘s obligation to make lease payments arising from a lease, measured on a discounted basis; and (ii) a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. As a result of this ASU, lessor accounting is largely unchanged and lessees will no longer be provided with a source of off-balance sheet financing. This ASU becomes effective for the Company on January 1, 2019. Early adoption is permitted. Lessees (for capital and operating leases) and lessors (for sales-type, direct financing, and operating leases) must apply a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the consolidated financial statements. The modified retrospective approach would not require any transition accounting for leases that expired before the earliest comparative period presented. Lessees and lessors may not apply a full retrospective transition approach. Management is currently evaluating the In March 2016, the FASB issued ASU 2016-09, “Compensation – Stock Compensation: Improvements to Employee Share-Based Payment Accounting.” This ASU simplifies certain aspects of accounting for equity-based compensation, including (i) accounting for income taxes, (ii) accounting for pre-vesting forfeitures and (iii) certain classification and disclosure elements. This ASU becomes effective for the Company on January 1, 2018. Early adoption is permitted. Management is currently evaluating the In August 2016, the FASB issued ASU 2016-15, “Statement of Cash Flows: Classification of Certain Cash Receipts and Cash Payments.” This ASU is intended to reduce diversity in practice in how certain cash receipts and payments are presented and classified in the statement of cash flows. The standard provides guidance in a number of situations including, among others, settlement of zero-coupon bonds, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, and distributions received from equity method investees. The ASU also provides guidance for classifying cash receipts and payments that have aspects of more than one class of cash flows. This ASU becomes effective for the Company on January 1, 2019. Early adoption is permitted. Management is currently evaluating the In October 2016, the FASB issued ASU 2016-16, “Income Taxes: Intra-Entity Transfers of Assets Other Than Inventory.” This ASU modifies existing guidance and is intended to reduce diversity in practice with respect to the accounting for the income tax consequences of intra-entity transfers of assets. The ASU indicates that the current exception to income tax accounting that requires companies to defer the income tax effects of certain intercompany transactions would apply only to intercompany inventory transactions. That is, the exception would no longer apply to intercompany sales and transfers of other assets (e.g., intangible assets). Under the existing exception, income tax expense associated with intra-entity profits in an intercompany sale or transfer of assets is eliminated from earnings. Instead, that cost is deferred and recorded on the balance sheet (e.g., as a prepaid asset) until the assets leave the consolidated group. Similarly, the entity is prohibited from recognizing deferred tax assets for the increases in tax bases due to the intercompany sale or transfer. This ASU becomes effective for the Company on January 1, 2019. Early adoption is permitted. Management is currently evaluating the In October 2016, the FASB issued ASU 2016-17, “Consolidation: Interests Held through Related Parties That Are under Common Control.” This ASU modifies existing guidance with respect to how a decision maker that holds an indirect interest in a variable interest entity (“VIE”) through a common control party determines whether it is the primary beneficiary of the VIE as part of the analysis of whether the VIE would need to be consolidated. Under the ASU, a decision maker would need to consider only its proportionate indirect interest in the VIE held through a common control party. Previous guidance had required the decision maker to treat the common control party’s interest in the VIE as if the decision maker held the interest itself. As a result of the ASU, in certain cases, previous consolidation conclusions may change. This ASU becomes effective for the Company on January 1, 2017, with retrospective application to January 1, 2016. The Company does not have significant involvement with entities subject to consolidation considerations impacted by VIE model factors. As a result, management does not expect this ASU to have a material impact on the consolidated financial statements of the Company.
Loss Per Share	The Company presents basic and diluted net loss per common share amounts. Basic net loss per share is calculated by dividing net loss available to common shareholders by the weighted average number of common shares outstanding during the applicable period. Diluted net loss per share is calculated by dividing net loss available to common shareholders by the weighted average number of common shares and common equivalent shares outstanding during the applicable period.

Accumulated Other Comprehensi22

Accumulated Other Comprehensive Loss (Tables)	9 Months Ended
	Sep. 30, 2016
Equity [Abstract]
Summary of Changes in the Components of Accumulated Other Comprehensive Loss	The following table summarizes changes in the components of accumulated other comprehensive loss: Quarter Ended Nine Months Ended September 30, September 30, Foreign currency translation adjustments 2016 2015 2016 2015 Balance at beginning of period $ (11,736 ) $ (12,866 ) $ (13,535 ) $ (8,203 ) Other comprehensive income (loss) 489 809 2,288 (3,854 ) Balance at end of period $ (11,247 ) $ (12,057 ) $ (11,247 ) $ (12,057 )

Loss Per Share (Tables)

Loss Per Share (Tables)	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Computation of Basic and Diluted Net Loss Per Common Share	The information used to compute basic and diluted net loss per common share was as follows: Quarter Ended Nine Months Ended September 30, September 30, 2016 2015 2016 2015 Net loss $ (3,611 ) $ (10,077 ) $ (12,030 ) $ (24,646 ) Weighted average shares outstanding (basic and diluted) 15,997,146 14,428,634 15,912,628 14,426,855 Net loss per common share: Basic $ (0.23 ) $ (0.70 ) $ (0.76 ) $ (1.71 ) Diluted $ (0.23 ) $ (0.70 ) $ (0.76 ) $ (1.71 )

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 30, 2016
Inventory Disclosure [Abstract]
Schedule of Inventories	Inventories consist of the following: September 30, December 31, 2016 2015 Raw materials and components $ 8,931 $ 9,467 Work in process 5,855 6,048 Finished goods 4,246 4,324 $ 19,032 $ 19,839

Equity-Based Compensation (Tabl

Equity-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2016
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Summary of Equity-Based Compensation Expense	The following table summarizes the total equity-based compensation expense recognized for awards issued under the Plan: Quarter Ended Nine Months Ended September 30, September 30, 2016 2015 2016 2015 Equity-based compensation expense recognized: Incentive stock options $ 347 $ 185 $ 490 $ 566 Restricted stock 203 237 614 678 Total equity-based compensation expense before income taxes 550 422 1,104 1,244 Benefit for income taxes* — — — — Total equity-based compensation expense net of income taxes $ 550 $ 422 $ 1,104 $ 1,244 The benefit for income taxes from equity-based compensation for each of the periods presented has been determined to be $0 based on valuation allowances against net deferred tax assets.
Assumptions for Fair Value of ISOs Estimated on the Date of Grant Using the Black-Scholes Option	The fair value of ISOs issued was estimated on the respective dates of grant using the Black-Scholes option pricing model with the following assumptions: August 19, 2016 August 12, 2016 Weighted average fair value per ISO $ 7.97 $ 8.07 Volatility 66.24 % 66.43 % Average risk-free interest rate 1.20 % 1.18 % Dividend yield 0.00 % 0.00 % Expected term (years) 5.5 6.0
Summary of Activity for ISOs	The activity for ISOs was as follows: Nine Months Ended September 30, 2016 2015 Number ISOs Weighted Weighted Average Grant Date Fair Value Number ISOs Weighted Weighted Average Grant Date Fair Value Outstanding at beginning of period 210,970 $ 17.43 $ 10.67 215,137 $ 17.35 $ 10.62 ISOs granted 139,000 $ 13.72 $ 8.00 — $ — $ — ISOs exercised — $ — $ — — $ — $ — ISOs forfeited (6,001 ) $ 15.74 $ 9.60 (9,834 ) $ 17.08 $ 10.45 ISOs expired (26,332 ) $ 17.74 $ 10.87 (833 ) $ 18.00 $ 11.03 Outstanding at end of period 317,637 $ 15.77 $ 9.48 204,470 $ 17.43 $ 10.67 ISOs exercisable at end of period 178,304 $ 17.01 $ 10.32 95,639 $ 18.00 $ 11.03 ISOs expected to vest at end of period 132,908 $ 14.18 $ 8.38 100,128 $ 16.85 $ 10.30
Summary of Activity for Restricted Stock Awards	The activity for restricted stock was as follows: Nine Months Ended September 30, 2016 2015 Shares of Restricted Stock Weighted Average Grant Date Fair Value Shares of Restricted Stock Weighted Average Grant Date Fair Value Outstanding at beginning of period 77,670 $ 19.57 80,834 $ 22.78 Restricted stock granted 74,500 $ 11.78 26,000 $ 13.23 Restricted stock vested (35,998 ) $ 19.25 (10,831 ) $ 34.80 Restricted stock forfeited (3,668 ) $ 19.46 — $ — Outstanding at end of period 112,504 $ 14.52 96,003 $ 18.84 Restricted stock expected to vest at end of period 112,504 $ 14.52 96,003 $ 18.84 Restricted stock vesting during the nine months ended September 30, 2016 and 2015, had a fair value of approximately $351 and $158, respectively

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Carrying Values and Fair Values of Other Financial Instruments	The carrying values and fair values of other financial instruments (assets and liabilities) not required to be recorded at fair value were as follows: September 30, December 31, 2016 2015 Carrying Value Fair Value Carrying Value Fair Value Cash and cash equivalents $ 29,813 $ 29,813 $ 19,342 $ 19,342 Current portion of long-term debt $ 141 $ 141 $ 138 $ 138 Current portion of capital leases $ 82 $ 82 $ 82 $ 82 Long-term debt - net of current portion $ 1,707 $ 1,707 $ 1,812 $ 1,800 Capital leases - net of current portion $ 24 $ 24 $ 81 $ 81

Basis of Presentation - Additio

Basis of Presentation - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2016
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
State of incorporation	Delaware
Date of incorporation	Jan. 1, 2013
Subsidiary Guarantor [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Percentage of ownership in subsidiary guarantors	100.00%

Liquidity - Additional Informat

Liquidity - Additional Information (Detail) - USD ($)	Jan. 13, 2016	Jan. 11, 2016	Jan. 08, 2016	Sep. 13, 2013	Sep. 09, 2013	Feb. 12, 2013	Feb. 06, 2013	Sep. 30, 2016	Mar. 31, 2016	Sep. 30, 2016	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Dec. 31, 2015	Dec. 31, 2014
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Net proceeds of secondary public offering											$ 595,000	$ 0	$ 170,353,000
Sale of common stock, value											595,000
Net income (loss)								$ (3,611,000)			(12,030,000)
Cash and cash equivalents								$ 29,813,000		$ 29,813,000	$ 29,813,000	$ 20,253,000	$ 29,813,000	$ 19,342,000	$ 36,202,000
IPO [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Common stock, new issuances							6,095,000
Common stock price per share							$ 18
Common stock, new shares sold by Company							5,483,333
Common stock, new shares sold by stockholder							611,667
Net proceeds of initial public offering						$ 91,996,000
Secondary Public Offering [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Common stock, new issuances					3,054,400
Common stock price per share					$ 62
Common stock, new shares sold by Company					1,106,000
Common stock, new shares sold by stockholder					1,948,400
Net proceeds of secondary public offering				$ 65,315,000
At Market Issuance Offering [Member] | FBR Capital Markets & Co. and MLV & Co. LLC [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Common stock, new shares sold by Company									91,940	0
Net proceeds of secondary public offering									$ 595,000
Percentage of commission on sale of common stock			3.00%
Reimbursement of certain legal expenses			$ 25,000
Gross proceeds from the sale of shares									843,000
Offering costs									248,000
Payments related to reimbursement of certain legal expenses and commissions									$ 50,000
At Market Issuance Offering [Member] | FBR Capital Markets & Co. and MLV & Co. LLC [Member] | Maximum [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Sale of common stock, value			$ 50,000,000
At Market Issuance Offering [Member] | FBR Capital Markets & Co. and MLV & Co. LLC [Member] | Weighted Average [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Common stock price per share									$ 9.17
Registered Direct Offering [Member] | Rockwell Forest Products, Inc. and S. Kent Rockwell [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Common stock price per share		$ 9.13
Common stock, new shares sold by Company		1,423,877
Net proceeds of secondary public offering	$ 12,447,000
Gross proceeds from the sale of shares	13,000,000
Offering costs	$ 553,000
Premium per share on closing price		$ 0.50

Accumulated Other Comprehensi29

Accumulated Other Comprehensive Loss - Summary of Changes in the Components of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement Of Income And Comprehensive Income [Abstract]
Balance at beginning of period	$ (11,736)	$ (12,866)	$ (13,535)	$ (8,203)
Other comprehensive income (loss)	489	809	2,288	(3,854)
Balance at end of period	$ (11,247)	$ (12,057)	$ (11,247)	$ (12,057)

Accumulated Other Comprehensi30

Accumulated Other Comprehensive Loss - Additional Information (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Statement Of Income And Comprehensive Income [Abstract]
Accumulated other comprehensive loss, tax	$ 0	$ 0
Amounts reclassified to earnings from accumulated other comprehensive loss	$ 0	$ 0

Loss Per Share - Additional Inf

Loss Per Share - Additional Information (Detail) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Incentive Stock Option [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potential shares of anti-dilutive common stock	317,637	204,470	317,637	204,470
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potential shares of anti-dilutive common stock	112,504	96,003	112,504	96,003

Loss Per Share - Computation of

Loss Per Share - Computation of Basic and Diluted Net Loss Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share [Abstract]
Net loss	$ (3,611)	$ (10,077)	$ (12,030)	$ (24,646)
Weighted average shares outstanding (basic and diluted)	15,997,146	14,428,634	15,912,628	14,426,855
Net loss per common share:
Basic	$ (0.23)	$ (0.70)	$ (0.76)	$ (1.71)
Diluted	$ (0.23)	$ (0.70)	$ (0.76)	$ (1.71)

Inventories - Schedule of Inven

Inventories - Schedule of Inventories (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Inventory Disclosure [Abstract]
Raw materials and components	$ 8,931	$ 9,467
Work in process	5,855	6,048
Finished goods	4,246	4,324
Inventories	$ 19,032	$ 19,839

Inventories - Additional Inform

Inventories - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Inventory [Line Items]
Allowance for slow-moving and obsolete inventories	$ 1,583	$ 1,909
Laser Micromachining Product [Member]
Inventory [Line Items]
Allowance for slow-moving and obsolete inventories		$ 507

Restructuring - Additional Info

Restructuring - Additional Information (Detail) - Auburn, Washington 3D Printing Operations [Member] $ in Thousands	3 Months Ended
	Jun. 30, 2016USD ($)
Restructuring Cost And Reserve [Line Items]
Total restructuring charges	$ 170
Involuntary employee terminations charges	57
Disposal charges of certain property and equipment	113
Additional charges expected to be incurred	0
Cost of Sales [Member]
Restructuring Cost And Reserve [Line Items]
Disposal charges of certain property and equipment	129
Research and Development [Member]
Restructuring Cost And Reserve [Line Items]
Disposal charges of certain property and equipment	2
Selling, General and Administrative Expenses [Member]
Restructuring Cost And Reserve [Line Items]
Disposal charges of certain property and equipment	$ 39

Impairment - Additional Informa

Impairment - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2016USD ($)Asset_Group	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)Asset_Group	Sep. 30, 2015USD ($)
Asset Impairment Charges [Abstract]
Number of operating asset groups | Asset_Group	3		3
Long-lived assets held for use impairment loss	$ 0	$ 0
Goodwill impairment		$ 4,419,000	$ 0	$ 4,419,000

Contingencies and Commitments -

Contingencies and Commitments - Additional Information (Detail) - Germany [Member] - German Bank [Member] - USD ($)	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Line Of Credit Facility [Line Items]
Credit facility, maximum borrowing capacity	$ 1,500,000
Credit facility, minimum increments	100,000
Credit facility, commitment fee	$ 0
Minimum
Line Of Credit Facility [Line Items]
Debt Instrument, term	30 days
Commercial Transactions Requiring Security [Member]
Line Of Credit Facility [Line Items]
Credit facility, interest rate	1.75%
Credit facility, outstanding amount	$ 1,277,000	$ 685,000
Expiration date, description	November 2016 through July 2018
Overdraft Credit [Member]
Line Of Credit Facility [Line Items]
Credit facility, interest rate	10.20%
Outstanding borrowings in form of overdraft credit or short-term loans	$ 0	0
Short-Term Loans [Member]
Line Of Credit Facility [Line Items]
Outstanding borrowings in form of overdraft credit or short-term loans	$ 0	$ 0

Equity-Based Compensation - Add

Equity-Based Compensation - Additional Information (Detail) - USD ($) $ in Thousands	Aug. 19, 2016	Aug. 12, 2016	Jan. 24, 2013	Sep. 30, 2016	Sep. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average remaining vesting period				2 years
Stock options issued				139,000	0
Incentive stock options exercised				0	0
Members of Management [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options issued		39,000
Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options issued	100,000
Incentive Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total future compensation expense				$ 1,000
Aggregate intrinsic value, ISOs expected to vest				155
Aggregate intrinsic value, ISOs exercisable				$ 47
Weighted average remaining contractual term, exercisable				7 years 4 months 24 days
Weighted average remaining contractual term, expected to vest				9 years 6 months
Incentive stock options exercised				0	0
Incentive Stock Option [Member] | Members of Management [Member] | Share-based Compensation Award, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards vesting percentage		33.33%
Incentive Stock Option [Member] | Members of Management [Member] | Share-based Compensation Award, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards vesting percentage		33.33%
Incentive Stock Option [Member] | Members of Management [Member] | Share-based Compensation Award, Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards vesting percentage		33.33%
Incentive Stock Option [Member] | Chief Executive Officer [Member] | Share-based Compensation Award, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards vesting percentage	33.33%
Incentive Stock Option [Member] | Chief Executive Officer [Member] | Share-based Compensation Award, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards vesting percentage	33.33%
Incentive Stock Option [Member] | Chief Executive Officer [Member] | Share-based Compensation Award, Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards vesting percentage	33.33%
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total future compensation expense				$ 1,110
2013 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for issuance			500,000
Common Stock [Member] | 2013 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of outstanding shares of common stock			3.00%
Common Stock [Member] | 2013 Equity Incentive Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares authorized			1,992,241

Equity-Based Compensation - Sum

Equity-Based Compensation - Summary of Total Equity-Based Compensation Expense Recognized for All ISOs, Restricted Stock and Stock Bonus Awards (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Equity-based compensation expense recognized:
Total equity-based compensation expense before income taxes		$ 550	$ 422	$ 1,104	$ 1,244
Benefit for income taxes	[1]	0	0	0	0
Total equity-based compensation expense net of income taxes		550	422	1,104	1,244
Incentive Stock Option [Member]
Equity-based compensation expense recognized:
Total equity-based compensation expense before income taxes		347	185	490	566
Restricted Stock [Member]
Equity-based compensation expense recognized:
Total equity-based compensation expense before income taxes		$ 203	$ 237	$ 614	$ 678
[1]	The benefit for income taxes from equity-based compensation for each of the periods presented has been determined to be $0 based on valuation allowances against net deferred tax assets.

Equity-Based Compensation - S40

Equity-Based Compensation - Summary of Total Equity-Based Compensation Expense Recognized for All ISOs, Restricted Stock and Stock Bonus Awards (Parenthetical) (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Benefit for income taxes from equity-based compensation	[1]	$ 0	$ 0	$ 0	$ 0
[1]	The benefit for income taxes from equity-based compensation for each of the periods presented has been determined to be $0 based on valuation allowances against net deferred tax assets.

Equity-Based Compensation - Ass

Equity-Based Compensation - Assumptions for Fair Value of ISOs Estimated on the Date of Grant Using the Black-Scholes Option (Detail) - Incentive Stock Option [Member] - $ / shares	Aug. 19, 2016	Aug. 12, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value per ISO	$ 7.97	$ 8.07
Volatility	66.24%	66.43%
Average risk-free interest rate	1.20%	1.18%
Dividend yield	0.00%	0.00%
Expected term (years)	5 years 6 months	6 years

Equity-Based Compensation - S42

Equity-Based Compensation - Summary of Activity for ISOs (Detail) - $ / shares	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of ISOs, outstanding, Beginning Balance	210,970	215,137
Stock options issued	139,000	0
Number of ISOs, exercised	0	0
Number of ISOs, forfeited	(6,001)	(9,834)
Number of ISOs, expired	(26,332)	(833)
Number of ISOs, outstanding, Ending Balance	317,637	204,470
Number of ISOs, exercisable	178,304	95,639
Number of ISOs, expected to vest, net of forfeitures	132,908	100,128
Weighted Average Exercise Price, Beginning Balance	$ 17.43	$ 17.35
Weighted Average Exercise Price, ISOs granted	13.72
Weighted Average Exercise Price, ISOs exercised
Weighted Average Exercise Price, ISOs forfeited	15.74	17.08
Weighted Average Exercise Price, ISOs expired	17.74	18
Weighted Average Exercise Price, Ending Balance	15.77	17.43
Weighted Average Exercise Price, ISOs exercisable	17.01	18
Weighted Average Exercise Price, ISOs expected to vest, net of forfeitures	14.18	16.85
Weighted Average Grant Date Fair Value, Beginning Balance	10.67	10.62
Weighted Average Grant Date Fair Value, ISOs granted	8
Weighted Average Grant Date Fair Value, ISOs exercised
Weighted Average Grant Date Fair Value, ISOs forfeited	9.60	10.45
Weighted Average Grant Date Fair Value, ISOs expired	10.87	11.03
Weighted Average Grant Date Fair Value, Ending Balance	9.48	10.67
Weighted Average Grant Date Fair Value, ISOs exercisable	10.32	11.03
Weighted Average Grant Date Fair Value, ISOs expected to vest, net of forfeitures	$ 8.38	$ 10.30

Equity-Based Compensation - S43

Equity-Based Compensation - Summary of Activity for Restricted Stock Awards (Detail) - Restricted Stock [Member] - $ / shares	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Restricted Shares, outstanding, Beginning Balance	77,670	80,834
Number of Restricted Shares, granted	74,500	26,000
Number of Restricted Shares, vested	(35,998)	(10,831)
Number of Restricted Shares, forfeited	(3,668)	0
Number of Restricted Shares, outstanding, Ending Balance	112,504	96,003
Number of Restricted Shares, expected to vest	112,504	96,003
Weighted Average Grant Date Fair Value, Beginning Balance	$ 19.57	$ 22.78
Weighted Average Grant Date Fair Value, granted	11.78	13.23
Weighted Average Grant Date Fair Value, vested	19.25	34.80
Weighted Average Grant Date Fair Value, forfeited	19.46
Weighted Average Grant Date Fair Value, Ending Balance	14.52	18.84
Weighted Average Grant Date Fair Value, expected to vest	$ 14.52	$ 18.84

Equity-Based Compensation - S44

Equity-Based Compensation - Summary of Activity for Restricted Stock Awards (Parenthetical) (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of restricted shares vesting	$ 351	$ 158

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Schedule Of Income Taxes [Line Items]
Provision (benefit) for income taxes	$ 25	$ (41)	$ 43	$ (200)
Effective tax rate	0.70%	(0.40%)	0.40%	(0.80%)
U.S. federal statutory rate	34.00%	34.00%	34.00%	34.00%
Liability for uncertain tax positions	$ 803		$ 803		$ 781
Subsidiaries [Member] | Germany [Member]
Schedule Of Income Taxes [Line Items]
Liability for uncertain tax positions	234		234		195
Subsidiaries [Member] | Japan [Member]
Schedule Of Income Taxes [Line Items]
Liability for uncertain tax positions	$ 471		$ 471		$ 285

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Financial instruments, asset	$ 0	$ 0
Financial instruments, liability	$ 0	$ 0

Fair Value Measurements - Carry

Fair Value Measurements - Carrying Values and Fair Values of Other Financial Instruments (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 29,813	$ 19,342	$ 20,253	$ 36,202
Current portion of long-term debt	141	138
Current portion of capital leases	82	82
Long-term debt - net of current portion	1,707	1,812
Capital leases - net of current portion	24	81
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	29,813	19,342
Current portion of long-term debt	141	138
Current portion of capital leases	82	82
Long-term debt - net of current portion	1,707	1,812
Capital leases - net of current portion	24	81
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	29,813	19,342
Current portion of long-term debt	141	138
Current portion of capital leases	82	82
Long-term debt - net of current portion	1,707	1,800
Capital leases - net of current portion	$ 24	$ 81

Concentration of Credit Risk -

Concentration of Credit Risk - Additional Information (Detail) - Five Most Significant Customers [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Revenue, Major Customer [Line Items]
Accounts receivable from significant customers	$ 1,400		$ 1,400		$ 4,808
Customer Concentration Risk [Member] | Sales Revenue, Net [Member]
Revenue, Major Customer [Line Items]
Revenue concentration, by most significant customers	36.00%	34.60%	21.40%	22.10%

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail)	Jan. 13, 2016USD ($)	Sep. 30, 2016USD ($)	Mar. 31, 2016USD ($)Offering	Sep. 30, 2015USD ($)	Mar. 31, 2015USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2015USD ($)	Oct. 23, 2015USD ($)	Jun. 30, 2015USD ($)
Related Party Transaction [Line Items]
Amortization of debt issuance costs						$ 204,000	$ 0
Number of separate equity offerings | Offering			2
Revenue - related party		$ 1,000		$ 152,000		73,000	1,294,000
Amounts due from related parties reflected in accounts receivable		1,000				1,000			$ 151,000
Deferred consideration									17,000
Amounts due to related party		1,000				1,000			15,000
Accounts Payable [Member]
Related Party Transaction [Line Items]
Amounts due to related party		1,000				1,000			1,000
Accrued Expenses and Other Current Liabilities [Member]
Related Party Transaction [Line Items]
Amounts due to related party									$ 14,000
Chairman of the Board of Directors and CEO [Member]
Related Party Transaction [Line Items]
Payments for products and/or services from related parties		3,000		6,000		13,000	21,000
Fair market value of benefits received from related party		$ 17,000		0		$ 21,000	22,000
3D Printing Machines [Member] | December 2014 Sale Agreement [Member] | Chairman of the Board of Directors and CEO [Member]
Related Party Transaction [Line Items]
Revenue - related party				70,000			185,000	$ 815,000
Consideration for printing machine								1,000,000
3D Printing Machines [Member] | March 2015 Sale Agreement [Member] | Chairman of the Board of Directors and CEO [Member]
Related Party Transaction [Line Items]
Revenue - related party				47,000			913,000
Consideration for printing machine					$ 950,000
3D Printing Machines [Member] | June 2015 Sale Agreement [Member] | Board Of Director [Member]
Related Party Transaction [Line Items]
Revenue - related party				$ 5,000			$ 146,000
Consideration for printing machine											$ 146,000
Consulting [Member] | Hans J. Sack [Member]
Related Party Transaction [Line Items]
Payments for products and/or services from related parties								$ 75,000
Consulting arrangement consideration included in selling, general and administrative expenses					$ 50,000
Revolving Credit Facility [Member] | RHI Investments, LLC [Member]
Related Party Transaction [Line Items]
Line of credit facility, maximum borrowing capacity										$ 15,000,000
Debt issuance costs										$ 215,000
Credit facility, outstanding amount	$ 0
Interest expense relating to the commitment fee	$ 5,000
Commitment fee	1.00%
Amortization of debt issuance costs			$ 204,000