Luna Innovations (LUNA) 10-Q 9 Aug 21 2021 Q2 Quarterly report Financial data

Cover page

Cover page - shares	6 Months Ended
	Jun. 30, 2021	Aug. 06, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2021
Document Transition Report	false
Entity File Number	000-52008
Entity Registrant Name	LUNA INNOVATIONS INC
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	54-1560050
Entity Address, Address Line One	301 First Street SW
Entity Address, Address Line Two	Suite 200
Entity Address, City or Town	Roanoke
Entity Address, State or Province	VA
Entity Address, Postal Zip Code	24011
City Area Code	540
Local Phone Number	769-8400
Title of 12(b) Security	Common Stock, $0.001 par value per share
Trading Symbol	LUNA
Security Exchange Name	NASDAQ
Entity Current Reporting Status	No
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		31,799,039
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Entity Central Index Key	0001239819
Current Fiscal Year End Date	--12-31

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 11,970	$ 15,366
Accounts receivable, net	24,605	24,951
Contract assets	6,857	7,046
Inventory	25,579	23,597
Prepaid expenses and other current assets	6,886	4,509
Total current assets	75,897	75,469
Property and equipment, net	3,183	3,308
Intangible assets, net	18,887	20,109
Goodwill	19,155	18,121
Long-term contract assets	0	471
Operating lease right-of-use asset	10,461	11,281
Finance lease right-of-use asset	220	244
Other assets	38	39
Deferred tax asset	1,486	1,960
Total assets	129,327	131,002
Current liabilities:
Current portion of long-term debt obligations	4,167	4,167
Accounts payable	3,962	4,393
Accrued liabilities	11,171	12,159
Contract liabilities	6,425	7,095
Current portion of operating lease liability	2,314	2,223
Current portion of finance lease liability	48	48
Total current liabilities	28,087	30,085
Long-term debt obligations	13,745	15,817
Long-term portion of operating lease liability	9,226	10,248
Long-term portion of operating lease liability	172	196
Other long-term liabilities	214	214
Total liabilities	51,444	56,560
Commitments and contingencies (Note 12)
Stockholders’ equity:
Common stock, par value $0.001, 100,000,000 shares authorized, 33,511,899 and 32,724,512 shares issued, 31,772,444 and 31,024,537 shares outstanding at June 30, 2021 and December 31, 2020, respectively	33	33
Treasury stock at cost, 1,739,455 and 1,699,975 shares at June 30, 2021 and December 31, 2020, respectively	(5,209)	(4,789)
Additional paid-in capital	95,936	92,403
Accumulated deficit	(13,505)	(12,957)
Accumulated other comprehensive income/(loss)	628	(248)
Total stockholders’ equity	77,883	74,442
Total liabilities and stockholders’ equity	$ 129,327	$ 131,002

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized (in shares)	100,000,000	100,000,000
Common stock, issued (in shares)	33,511,899	32,724,512
Common stock, outstanding (in shares)	31,772,444	31,024,537
Treasury stock (in shares)	1,739,455	1,699,975

Consolidated Statements of Oper

Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues:
Total revenues	$ 27,937	$ 18,576	$ 54,236	$ 35,717
Cost of revenues:
Total cost of revenues	13,987	9,059	26,857	17,836
Gross profit	13,950	9,517	27,379	17,881
Operating expense:
Selling, general and administrative	13,142	6,202	24,432	12,579
Research, development and engineering	1,810	1,505	4,743	3,102
Total operating expense	14,952	7,707	29,175	15,681
Operating (loss)/income	(1,002)	1,810	(1,796)	2,200
Other income/(expense):
Investment income	0	4	0	64
Other income/(expense)	0	(4)	0	5
Interest expense, net	(122)	(1)	(265)	(1)
Total other (expense)/income	(122)	(1)	(265)	68
(Loss)/income from continuing operations before income taxes	(1,124)	1,809	(2,061)	2,268
Income tax (benefit)/expense	(894)	440	(1,513)	579
Net (loss)/income from continuing operations	(230)	1,369	(548)	1,689
Loss from discontinued operations, net of income tax of $—	0	0	0	(1,436)
Net (loss)/income	$ (230)	$ 1,369	$ (548)	$ 253
Net (loss)/income per share from continuing operations:
Basic (in dollars per share)	$ (0.01)	$ 0.04	$ (0.02)	$ 0.06
Diluted (in dollars per share)	(0.01)	0.04	(0.02)	0.05
Net loss per share from discontinued operations:
Basic (in dollars per share)	0	0	0	(0.05)
Diluted (in dollars per share)	0	0	0	(0.04)
Net (loss)/income per share attributable to common stockholders:
Basic (in dollars per share)	(0.01)	0.04	(0.02)	0.01
Diluted (in dollars per share)	$ (0.01)	$ 0.04	$ (0.02)	$ 0.01
Weighted average shares:
Basic (in shares)	31,494,563	30,484,797	31,413,451	30,589,249
Diluted (in shares)	33,500,801	32,494,950	33,487,109	32,466,122
Lightwave
Revenues:
Total revenues	$ 21,965	$ 12,933	$ 42,962	$ 24,487
Cost of revenues:
Total cost of revenues	9,441	5,181	18,212	10,066
Operating expense:
Operating (loss)/income	(887)	642	(1,197)	1,145
Luna Labs
Revenues:
Total revenues	5,972	5,643	11,274	11,230
Cost of revenues:
Total cost of revenues	4,546	3,878	8,645	7,770
Operating expense:
Operating (loss)/income	$ (115)	$ 1,168	$ (599)	$ 1,055

Consolidated Statements of Op_2

Consolidated Statements of Operations (Unaudited) (Parenthetical) $ in Thousands	6 Months Ended
	Jun. 30, 2020USD ($)
Income Statement [Abstract]
Tax benefit from loss on sale of discontinued operations	$ 0

Consolidated Statements of Comp

Consolidated Statements of Comprehensive (Loss)/Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net loss	$ (230)	$ 1,369	$ (548)	$ 253
Foreign currency translation adjustment	(247)	0	876	0
Total other comprehensive (loss)/income	$ (477)	$ 1,369	$ 328	$ 253

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive (Loss)/Income
Beginning balance (in shares) at Dec. 31, 2019		30,149,105	(1,639,791)
Beginning balance at Dec. 31, 2019	$ 67,469	$ 32	$ (4,337)	$ 88,022	$ (16,248)	$ 0
Increase (Decrease) in Stockholders' Equity
Exercise of stock options (in shares)		662,965
Exercise of stock options	1,925	$ 1		1,924
Share-based compensation (in shares)		67,268
Share-based compensation	967			967
Deferred compensation issuance (in shares)		47,377
Deferred Compensation Issuance	78			78
Purchase of treasury stock (in shares)		(32,950)	(32,950)
Purchase of treasury stock	(204)		$ (204)
Net (loss)/income	253				253
Foreign currency translation adjustment	0
Forfeitures of restricted stock (in shares)		(96,230)
Forfeitures of restricted stock	(686)			(686)
Ending balance (in shares) at Jun. 30, 2020		30,797,535	(1,672,741)
Ending balance at Jun. 30, 2020	69,802	$ 33	$ (4,541)	90,305	(15,995)	0
Beginning balance (in shares) at Mar. 31, 2020		30,486,577	(1,639,791)
Beginning balance at Mar. 31, 2020	67,777	$ 32	$ (4,337)	89,446	(17,364)	0
Increase (Decrease) in Stockholders' Equity
Exercise of stock options (in shares)		346,461
Exercise of stock options	727	$ 1		726
Share-based compensation (in shares)		11,600
Share-based compensation	465			465
Deferred compensation issuance (in shares)		47,377
Deferred Compensation Issuance	78			78
Purchase of treasury stock (in shares)		(32,950)	(32,950)
Purchase of treasury stock	(204)		$ (204)
Net (loss)/income	1,369				1,369
Foreign currency translation adjustment	0
Forfeitures of restricted stock (in shares)		(61,530)
Forfeitures of restricted stock	(410)			(410)
Ending balance (in shares) at Jun. 30, 2020		30,797,535	(1,672,741)
Ending balance at Jun. 30, 2020	69,802	$ 33	$ (4,541)	90,305	(15,995)	0
Beginning balance (in shares) at Dec. 31, 2020		31,024,537	(1,699,975)
Beginning balance at Dec. 31, 2020	74,442	$ 33	$ (4,789)	92,403	(12,957)	(248)
Increase (Decrease) in Stockholders' Equity
Exercise of stock options (in shares)		578,181
Exercise of stock options	1,489			1,489
Share-based compensation (in shares)		146,013
Share-based compensation	1,514			1,514
ESPP Issuance (in shares)		63,193
ESPP issuance	530			530
Purchase of treasury stock (in shares)		(39,480)	(39,480)
Purchase of treasury stock	(420)		$ (420)
Net (loss)/income	(548)				(548)
Foreign currency translation adjustment	876					876
Ending balance (in shares) at Jun. 30, 2021		31,772,444	(1,739,455)
Ending balance at Jun. 30, 2021	77,883	$ 33	$ (5,209)	95,936	(13,505)	628
Beginning balance (in shares) at Mar. 31, 2021		31,392,989	(1,720,785)
Beginning balance at Mar. 31, 2021	76,546	$ 33	$ (4,991)	93,904	(13,275)	875
Increase (Decrease) in Stockholders' Equity
Exercise of stock options (in shares)		263,484
Exercise of stock options	645			645
Share-based compensation (in shares)		71,448
Share-based compensation	857			857
ESPP Issuance (in shares)		63,193
ESPP issuance	530			530
Purchase of treasury stock (in shares)		(18,670)	(18,670)
Purchase of treasury stock	(218)		$ (218)
Net (loss)/income	(230)				(230)
Foreign currency translation adjustment	(247)					(247)
Ending balance (in shares) at Jun. 30, 2021		31,772,444	(1,739,455)
Ending balance at Jun. 30, 2021	$ 77,883	$ 33	$ (5,209)	$ 95,936	$ (13,505)	$ 628

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows (used in)/provided by operating activities
Net (loss)/income	$ (548)	$ 253
Adjustments to reconcile net loss to net cash (used in)/provided by operating activities
Depreciation and amortization	2,360	1,363
Share-based compensation	1,514	967
Bad debt expense	0	(26)
Loss from discontinued operations, net of tax	0	1,436
Deferred taxes	475	(10)
Change in assets and liabilities
Accounts receivable	(473)	(139)
Contract assets	763	(508)
Inventory	(1,562)	(937)
Other current assets	(2,399)	(404)
Accounts payable and accrued expenses	(2,185)	(1,286)
Contract liabilities	(826)	(520)
Net cash (used in)/provided by operating activities	(2,881)	193
Cash flows (used in)/provided by investing activities
Acquisition of property and equipment	(551)	(111)
Intangible property costs	(141)	(192)
Proceeds from sale of discontinued operations	0	600
Net cash (used in)/provided by investing activities	(692)	298
Cash flows (used in)/provided by financing activities
Payments on finance lease obligations	(24)	(26)
Payments of debt obligations	(2,072)	0
Repurchase of common stock	(420)	(328)
Proceeds from ESPP	530	0
Proceeds from the exercise of options and warrants	1,490	1,363
Net cash (used in)/provided by financing activities	(496)	1,009
Effect of exchange rate changes on cash and cash equivalents	673	0
Net (decrease)/increase in cash and cash equivalents	(3,396)	1,500
Cash and cash equivalents—beginning of period	15,366	25,006
Cash and cash equivalents—end of period	11,970	26,506
Supplemental disclosure of cash flow information
Cash paid for interest	125	2
Cash received for income tax refund, net	$ 87	$ 29

Basis of Presentation and Signi

Basis of Presentation and Significant Accounting Policies	6 Months Ended
	Jun. 30, 2021
Accounting Policies [Abstract]
Basis of Presentation and Significant Accounting Policies	Basis of Presentation and Significant Accounting Policies Nature of Operations Luna Innovations Incorporated (“we,” “Luna Innovations” or the “Company”), headquartered in Roanoke, Virginia, was incorporated in the Commonwealth of Virginia in 1990 and reincorporated in the State of Delaware in April 2003. We are a leader in advanced optical technology, providing high performance fiber optic test, measurement and control products for the telecommunications and photonics industries, and distributed fiber optic sensing solutions that measure, or "sense" the structures for industries ranging from aerospace, automotive, oil and gas, security and infrastructure. Our communications test and control products help customers test their fiber optic networks and assemblies with speed and precision in both lab and production environments, accelerating the development of fiber optic products and assuring accurate testing of optical components like photonic integrated circuits ("PICs") and coherent receivers, which are both critical elements of meeting the world’s exponentially growing demand for bandwidth. Our distributed fiber optic sensing products help designers and manufacturers more efficiently develop new and innovative products by measuring stress, strain, and temperature at a high resolution for new designs or manufacturing processes. In addition, our distributed fiber optic sensing products ensure the safety and structural integrity or operational health of critical assets in the field, by monitoring stress, strain, and vibration in large civil and industrial infrastructure such as bridges, roads, pipelines and borders. We also provide applied research services, typically under research programs funded by the U.S. government, in areas of advanced materials, sensing, and healthcare applications. Our business model is designed to accelerate the process of bringing new and innovative products to market. We use our in-house technical expertise across a range of technologies to perform applied research services for companies and for government funded projects. We continue to invest in product development and commercialization, which we anticipate will lead to increased product sales growth. Unaudited Interim Financial Information The accompanying unaudited consolidated interim financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial statements and Article 10 of Regulation S-X of the Securities Exchange Act of 1934, as amended. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for annual financial statements. The unaudited consolidated interim financial statements have been prepared on the same basis as the annual financial statements and in the opinion of management reflect all adjustments, consisting of only normal recurring accruals considered necessary to present fairly our financial position at June 30, 2021, results of operations, comprehensive (loss)/income and changes in stockholders' equity for the three and six months ended June 30, 2021 and 2020, and cash flows for the six months ended June 30, 2021 and 2020. The results of operations for the three and six months ended June 30, 2021, are not necessarily indicative of the results that may be expected for the year ending December 31, 2021. The consolidated balance sheet as of December 31, 2020 was derived from our audited consolidated financial statements. The COVID-19 pandemic has resulted in a global slowdown of economic activity. While the impact of the COVID-19 pandemic to our business and operating results presents additional uncertainty, we continue to use reasonably available information to assess certain accounting matters including, but not limited to, accounts receivable, inventory and the carrying value of goodwill and other long-lived tangible and intangible assets. While the assessments have not resulted in any material impacts to our financial statements as of June 30, 2021, we believe the full impact of the pandemic remains uncertain and ongoing developments related to the pandemic may cause material impacts to our consolidated financial statements. The consolidated interim financial statements, including our significant accounting policies, should be read in conjunction with the audited Consolidated Financial Statements and the notes thereto for the year ended December 31, 2020, included in our Annual Report on Form 10-K as filed with the Securities and Exchange Commission (“SEC”) on March 12, 2021. Goodwill and Intangible Assets Goodwill and intangible assets with indefinite lives are not amortized but are tested for impairment on an annual basis, as of October 1 of each year, or whenever events or changes in circumstances indicate that the carrying amount of these assets may not be recoverable. Purchased intangible assets with finite useful lives are amortized using the straight-line method over their estimated useful lives and reviewed for impairment as described above. 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 the principal or most advantageous market in an orderly transaction between marketplace participants. Various valuation approaches can be used to determine fair value, each requiring different valuation inputs. The following hierarchy classifies the inputs used to determine fair value into three levels: • Level 1—Quoted prices for identical instruments in active markets. • Level 2—Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which significant value drivers are observable. • Level 3—Valuations derived from valuation techniques in which significant value drivers are unobservable. The carrying values of cash and cash equivalents, accounts receivable, accounts payable and accrued liabilities approximate fair value because of the short-term nature of these instruments. The carrying amount of lease liabilities approximate fair value because these financial instruments bear interest at rates that approximate current market rates for similar agreements with similar maturities and credit. We consider the terms of the PNC Bank, National Association debt facility including its interest rate of LIBOR plus a margin ranging from 1.75% to 2.25%, to be at market based upon similar instruments that would be available to us. Reportable Segments We have two operating and reportable segments: Lightwave and Luna Labs. During the three months ended June 30, 2020, we changed our reportable segments to Lightwave and Luna Labs to align with how our Chief Operating Decision Maker (CODM) evaluates segment performance and allocates resources to the segments. Prior to the three months ended June 30, 2020, we reported under two different reporting segments, Products and Licensing and Technology Development. We have reflected these new segment measures beginning in the three months ended June 30, 2020 and prior periods have been restated for comparability. The Lightwave segment develops, manufactures and markets distributed fiber optic sensing products and fiber optic communications test and control products. The Luna Labs segment performs applied research principally in the areas of sensing and instrumentation, advanced materials and health sciences. Net Income Per Share Basic per share data is computed by dividing our net income by the weighted average number of shares outstanding during the period. Diluted per share data is computed by dividing net income by the weighted average shares outstanding during the period increased to include, if dilutive, the number of additional common share equivalents that would have been outstanding if potential shares of common stock had been issued using the treasury stock method. Diluted per share data would also include the potential common share equivalents relating to convertible securities by application of the if-converted method. The effects of 2.0 million and 2.0 million common stock equivalents are included for the diluted per share data for the three months ended June 30, 2021 and 2020, respectively. The effects of 2.1 million and 1.9 million common stock equivalents are included for the diluted per share data for the six months ended June 30, 2021 and 2020, respectively. Stock options and deferred stock units credited to our directors under our non-employee deferred compensation plan are included in our common stock equivalents for the three and six months ended June 30, 2021 and 2020. Foreign Currency For our non-U.S. dollar functional currency subsidiaries, assets and liabilities are translated into U.S. dollars using fiscal period end exchange rates. Sales and expenses are translated at average monthly exchange rates. Foreign currency translation gains and losses are included as a component of accumulated other comprehensive loss within equity. Gains and losses resulting from foreign currency transactions are included in earnings. Recently Adopted Accounting Pronouncements In December 2019, the FASB issued ASU 2019-12 Simplifying the Accounting for Income Taxes , which removes certain exceptions to the general principles of the accounting for income taxes and also improves consistent application of and simplification of other areas when accounting for income taxes. The guidance is effective for us beginning in the first quarter of fiscal year 2021. We adopted ASU 2019-12, effective January 1, 2021. The adoption of ASU 2019-12 did not have a significant impact on our consolidated financial statements. Recently Issued Pronouncements, Not Yet Adopted In June 2016, the FASB issued ASU 2016-13 Financial Instruments - Credit Losses (Topic 326) - Measurement of Credit Losses on Financial Instruments, which requires companies to measure financial assets at an amortized cost basis to be presented at the net amount expected to be collected. The new accounting rules eliminate the probable initial recognition threshold and, instead, reflect an entity's current estimate of all expected credit losses. ASU 2016-13 is applicable to our trade receivables. This pronouncement was amended under ASU 2019-10 to allow an extension on the adoption date for entities that qualify as a small reporting company. We have elected this extension and the effective date for us to adopt this standard will be for fiscal years beginning after December 15, 2022. We are currently in the process of evaluating the impact of ASU 2016-13, but we do not expect the adoption of this new accounting rule to have a significant impact on our consolidated financial statements.

Business Acquisitions

Business Acquisitions	6 Months Ended
	Jun. 30, 2021
Business Combination and Asset Acquisition [Abstract]
Business Acquisitions	Business Acquisitions OptaSense Holdings Limited On December 3, 2020, we entered into and closed a Share Purchase Agreement (the “Share Purchase Agreement”) with QinetiQ Holdings Limited (“QinetiQ”) for the purchase of all of the shares of OptaSense, a recognized market leader in fiber optic distributed monitoring solutions for pipelines, oilfield services, security, highways and railways, as well as power and utilities monitoring systems. Pursuant to the Share Purchase Agreement, we acquired all outstanding shares of OptaSense for aggregate consideration of $38.9 million (£29.0 million) subject to adjustment as described in the Share Purchase Agreement (the “Transaction”). The acquisition of OptaSense provides us with important distributed acoustic sensing ("DAS") intellectual property and products. OptaSense's technology and products and geographic footprint are highly complementary to Luna, which we believe will accelerate our technology and overall growth roadmap. The Share Purchase Agreement and a Tax Deed entered into between QinetiQ and us (the “Tax Deed”) in connection with the Share Purchase Agreement contain customary representations and warranties and indemnities. In addition, at closing of the acquisition, we obtained a warranty and indemnity insurance policy from Liberty Mutual Insurance Europe SE (LMIE) in connection with the Share Purchase Agreement and the Tax Deed. New Ridge Technologies On October 29, 2020, we acquired New Ridge Technologies, a small company that develops and manufactures fiber optic test and measurement equipment and advanced fiber optic subsystems primarily for telecommunication and radio-over-fiber applications. New Ridge's acquired operations will be integrated into, and reported as a part of, our Lightwave segment. This acquisition supports our growth strategy in the communications test arena. The total consideration was $0.6 million which consisted of $0.4 million paid at closing and $0.2 million of contingent consideration related to an earn-out provision. We recorded $0.02 million of goodwill upon the completion of the purchase consideration allocation. Depending on the achievement of certain metrics during the two years following closing, we may pay the seller up to $0.2 million in contingent consideration related to the earn-out provision. These acquisitions have been accounted for under the acquisition method of accounting in accordance with ASC 805 - Business Combinations. Under ASC 805, the total estimated purchase consideration is allocated to the acquired tangible and intangible assets and assumed liabilities based on their estimated fair values as of the acquisition date. Any excess of the fair value of the acquisition consideration over the identifiable assets acquired and liabilities assumed is recognized as goodwill. The following table summarizes the preliminary allocation of the purchase consideration of the OptaSense acquisition (excluding cash of $5.2 million): (in thousands) Accounts receivable $ 4,534 Contract assets 1,513 Inventory 12,793 Other current assets 1,026 Property and equipment 1,247 Identifiable intangible assets 11,263 Goodwill 8,520 Right of use assets 2,151 Other long-term assets 22 Accounts payable and accrued expenses (3,925) Contract liabilities (3,259) Other current liabilities (862) Long-term operating lease liability (1,335) Total purchase consideration $ 33,688 During the three months ended June 30, 2021, we obtained new information about facts and circumstances that existed as of the acquisition date that resulted in a change in the fair value of assets and liabilities recognized. Accordingly, the fair values of assets and liabilities have been revised as of the acquisition date, resulting in an increase in goodwill of $0.9 million, which was primarily related to an adjustment of accounts receivable. The identifiable intangible assets and their estimated useful lives were as follows: Estimated (in thousands) Useful Life OptaSense Developed technology 10 years $ 7,379 Trade names and trademarks 15 years 2,580 Backlog 3 years 699 Customer relationships 5 years 605 $ 11,263 OptaSense's developed technology primarily consists of its DAS product solutions that deliver superior measurements for a wide range of applications from advanced industrial monitoring through high performance geophysical measurements. The developed technologies were valued using the "multi-period excess earnings" method, under the income approach. The multi-period excess earnings method reflects the present value of the projected cash flows that are expected by the developed technologies less charges representing the contribution of other assets to those cash flows. A discount rate of 17.5% was used to discount the cash flows to the present value. Trade names and trademarks are considered a type of guarantee of a certain level of recognizability, quality or performance represented by the OptaSense brand. Trade names and trademarks were valued using the "relief from royalty" method under the income approach. This method is based on the assumption that in lieu of ownership, a market participant would be willing to pay a royalty in order to exploit the related benefits of these assets. A discount rate of 17.5% was used to discount the cash flows to the present value. Backlog arises from unfulfilled purchase or sales order contracts. The value of OptaSense's backlog as of the acquisition date was calculated using the income approach. A discount rate of 16.5% was used to discount the cash flows attributable solely to the backlog to the present value. Customer relationships represent the fair value of either (i) the avoidance of cost associated with the creation of a new customer relationship or (ii) the projected cash flows that will be derived from the sale of products to existing customers as of the acquisition date. OptaSense's customer relationships were valued using the cost approach based on the expected time to re-build the customer base. A discount rate of 17.5% was used to discount these cash flows to the present value. Goodwill represents the excess of consideration transferred over the net of the acquisition date fair values of the assets acquired and the liabilities assumed in connection with the acquisition. Goodwill generated from our business acquisitions was primarily attributable to expected synergies from future customer and sales growth. The purchase price allocation is preliminary mainly due to the finalization of income tax considerations. Pro forma consolidated results of operations The following unaudited pro forma financial information presents combined results of operations for the period presented as if the acquisition of OptaSense had been completed on January 1, 2019. The pro forma information includes adjustments to amortization expense for the intangible assets acquired and interest expense for the additional debt used to partially fund the acquisition price. The pro forma data are for informational purposes only and are not necessarily indicative of the consolidated results of operations or the combined business had the acquisition of OptaSense occurred on January 1, 2019, or the results of future operations of the combined business. For instance, planned or expected operational synergies following the acquisition are not reflected in the pro forma information. Consequently, actual results will differ from the unaudited pro forma information presented below. Three Months Ended June 30, 2020 Six Months Ended June 30, 2020 (in thousands) Revenue $ 22,847 $ 47,713 Loss from continuing operations $ (1,507) $ (177)

Intangible assets, net

Intangible assets, net	6 Months Ended
	Jun. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible assets, net	Intangible assets, net Intangible assets, net at June 30, 2021 and December 31, 2020 consisted of the following: Estimated Life June 30, 2021 December 31, 2020 (in thousands) Patent costs 1 - 18 years $ 5,797 $ 5,702 Developed technology 5 - 10 years 17,608 17,344 In-process research & development N/A 1,580 1,580 Customer base 5-7 years 1,307 1,302 Trade names 3 - 15 years 3,138 3,122 Backlog 3 years 701 696 30,131 29,746 Accumulated amortization (11,244) (9,637) $ 18,887 $ 20,109 Amortization expense for the each of the three and six months ended June 30, 2021 was $0.8 million and $1.6 million, respectively. Estimated aggregate amortization, based on the net value of intangible assets at June 30, 2021, for each of the next five years and beyond is as follows (amounts in thousands): Year Ending December 31, 2021 - remaining 6 months $ 1,695 2022 2,924 2023 2,827 2024 2,416 2025 2,082 2026 & beyond 6,943 Total $ 18,887

Goodwill

Goodwill	6 Months Ended
	Jun. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	Goodwill    Goodwill was $19.2 million and $18.1 million at June 30, 2021 and December 31, 2020, respectively, and has been allocated to the Lightwave segment. The change in goodwill during the three months ended June 30, 2021 was comprised of $0.9 million of measurement period adjustments to the OptaSense opening balance sheet and $0.2 million impact from foreign currency translation.

Inventory

Inventory	6 Months Ended
	Jun. 30, 2021
Inventory Disclosure [Abstract]
Inventory	Inventory Inventory consists of finished goods, work-in-process and raw materials valued at the lower of cost (determined on the first-in, first-out basis) or net realizable value. Components of inventory were as follows: June 30, December 31, (in thousands) Finished goods $ 12,894 $ 11,547 Work-in-process 1,217 1,425 Raw materials 11,468 10,625 Total inventory $ 25,579 $ 23,597

Accrued Liabilities

Accrued Liabilities	6 Months Ended
	Jun. 30, 2021
Payables and Accruals [Abstract]
Accrued Liabilities	Accrued Liabilities Accrued liabilities at June 30, 2021 and December 31, 2020 consisted of the following: June 30, 2021 December 31, 2020 (in thousands) Accrued compensation $ 8,235 $ 9,103 Contingent consideration 225 225 Accrued professional fees 1,170 825 Accrued income tax 452 281 Accrued interest 21 42 Accrued royalties 454 456 Accrued liabilities - other 614 1,227 Total accrued liabilities $ 11,171 $ 12,159

Debt

Debt	6 Months Ended
	Jun. 30, 2021
Debt Disclosure [Abstract]
Debt	Debt Long-term debt consisted of the following: (in thousands) June 30, 2021 December 31, 2020 Term Loan (net of debt issuance costs of $55 and $66, 2.48% and 2.48% at June 30, 2021 and December 31, 2020, respectively) $ 10,362 $ 12,434 Revolving Loan (2.48% at June 30, 2021 and December 31, 2020) 7,550 7,550 17,912 19,984 Less: Current portion of long-term debt obligations (4,167) (4,167) Long-term debt obligations $ 13,745 $ 15,817 PNC Bank Facility On December 1, 2020 (the “Effective Date”), we entered into a Loan Agreement (the “Loan Agreement”) with PNC Bank, National Association, as lender (the “Lender”) and our domestic subsidiaries as guarantors. The Loan Agreement provides a $12.5 million term loan facility (the “Term Loan”) and a $15.0 million revolving credit facility (the “Revolving Line”), which includes a $3.0 million letter of credit sublimit. On the Effective Date, we borrowed the full amount of the Term Loan from the Lender pursuant to a term note (the “Term Note”) and a $7.6 million revolving loan (the “Revolving Loan”) pursuant to a revolving line of credit note (the “Revolving Line of Credit Note”). We may repay and reborrow advances under the Revolving Line from time to time pursuant to the Revolving Line of Credit Note. The Term Loan matures on December 1, 2023. The Term Loan is due and payable in 12 equal quarterly payments of principal and interest. The Term Loan bears interest at a floating per annum rate equal to the sum of (a) LIBOR plus (b) a margin ranging from 1.75% to 2.25% depending on the Net Leverage Ratio (as defined in the Loan Agreement). We may prepay the Term Loan without penalty or premium. The Revolving Line expires on December 1, 2023. Borrowings under the Revolving Line will bear interest at a floating per annum rate equal to the sum of (a) LIBOR plus (b) a margin ranging from 1.75% to 2.25% depending on the Net Leverage Ratio. Accrued interest will be due and payable on the first day of each month and the outstanding principal balance and any accrued but unpaid interest will be due and payable on December 1, 2023. The unused portion of the Revolving Line will accrue a fee equal to 0.20% per annum multiplied by the quarterly average unused amount. Provided our obligations under the Loan Agreement have been satisfied, we may terminate the Loan Agreement at any time upon three The Loan Agreement includes a number of affirmative and restrictive covenants applicable to us and our subsidiaries, including, among others, affirmative covenants regarding delivery of financial statements, payment of taxes, and maintenance of government compliance, and restrictive covenants regarding dispositions of property, acquisitions, incurrence of additional indebtedness or liens, investments and transactions with affiliates. We are also restricted from paying dividends or making other distributions or payments on our capital stock, subject to limited exceptions. Additionally, we are subject to financial covenants regarding minimum net leverage and fixed charge coverage. We were in compliance with our financial covenants as of June 30, 2021. Upon the occurrence of certain events, including failure to satisfy our payment obligations under the Loan Agreement, failure to adhere to the financial covenants, the breach of certain of our other covenants under the Loan Agreement, cross defaults to other indebtedness or material agreements, judgment defaults and defaults related to failure to maintain governmental approvals, the Lender will have the right, among other remedies, to declare all principal and interest immediately due and payable, and to exercise secured party remedies. Maturities on debt are as follows ( in thousands) : Year Ending December 31, Amount 2021 - remaining 6 months $ 2,083 2022 4,167 2023 11,662 Total $ 17,912 Interest expense, net for the three and six months ended June 30, 2021 and 2020 consisted of the following: Three Months Ended June 30, Six Months Ended June 30, (in thousands) 2021 2020 2021 2020 Interest expense on Term Loan $ 66 $ — $ 142 $ — Interest expense on Revolving Line 45 — 75 — Amortization of debt issuance costs 11 — 22 — Other interest expense 1 1 27 1 Interest income (1) (1) Total interest expense, net $ 122 $ 1 $ 265 $ 1

Leases

Leases	6 Months Ended
	Jun. 30, 2021
Leases [Abstract]
Leases	Leases We recognize right-of-use ("ROU") assets and lease liabilities on the balance sheet for those leases classified as operating or finance leases with terms greater than twelve months. We have operating leases for our facilities, which have remaining terms ranging from 1 to 10 years. Most of our leases do not have an option to extend the lease period beyond the stated term unless the new term is agreed to by both parties. They also do not have an early termination clause included. Our operating lease agreements do not contain any material restrictive covenants. Some of our operating lease agreements contain variable payment provisions that provide for rental increases based on consumer price indices. The change in rent expense resulting from changes in these indices are included within variable rent. We also have finance leases for equipment which have remaining terms ranging from 1 to 3 years. These lease agreements are for general office equipment with a 5-year useful life. These lease agreements do not have an option to extend the lease beyond the stated terms nor do they have an early termination clause. These lease agreements do not have any variable payment provisions included. The finance lease costs consist of interest expense and amortization, and are included primarily in selling, general and administrative expense in our consolidated statements of operations. The discount rate for both our operating and finance leases was not readily determinable in the specific lease agreements. As a result, our incremental borrowing rate was used as the discount rate when establishing the ROU assets and corresponding lease liabilities. As of June 30, 2021, we had no operating or finance leases that have not yet commenced. Rent expense is recognized on a straight-line basis over the life of the lease. Rent expense consists of the following: Three Months Ended June 30, Six months ended June 30, (in thousands) 2021 2020 2021 2020 Operating lease costs $ 741 $ 367 $ 1,450 $ 779 Variable rent costs (28) 25 (57) (14) Total rent expense $ 713 $ 392 $ 1,393 $ 765 Future minimum lease payments under non-cancelable operating and finance leases were as follows as of June 30, 2021 (amounts in thousands): Operating Leases Finance Leases Year Ending December 31, 2021 - remaining 6 months $ 1,561 $ 26 2022 2,817 53 2023 2,402 53 2024 1,902 52 2025 1,230 48 2026 and beyond 3,883 — Total future minimum lease payments 13,795 232 Less: interest 2,255 12 Total lease liabilities $ 11,540 $ 220 Current lease liability $ 2,314 $ 48 Long-term lease liability 9,226 172 Total lease liabilities $ 11,540 $ 220 Other information related to leases is as follows: Three Months Ended June 30, Six months ended June 30, (in thousands, except weighted-average data) 2021 2020 2021 2020 Finance lease cost: Amortization of right-of-use assets $ 13 $ 14 $ 27 $ 27 Interest on lease liabilities (1) (1) (3) (1) Total finance lease cost $ 12 $ 13 $ 24 $ 26 Other information: Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 741 $ 367 $ 1,450 $ 744 Finance cash flows from finance leases $ 12 $ 13 $ 24 $ 26 Right-of-use assets obtained in exchange for new operating lease liabilities $ — $ 5,531 $ — $ 5,531 Right-of-use assets obtained in exchange for new finance lease liabilities $ — $ — $ — $ — Weighted-average remaining lease term (years) - operating leases 6.1 8.3 6.1 3.7 Weighted-average remaining lease term (years) - finance leases 4.4 1.9 4.4 1.9 Weighted-average discount rate - operating leases 6 % 6 % 6 % 6 % Weighted-average discount rate - finance leases 2 % 7 % 2 % 7 %
Leases	Leases We recognize right-of-use ("ROU") assets and lease liabilities on the balance sheet for those leases classified as operating or finance leases with terms greater than twelve months. We have operating leases for our facilities, which have remaining terms ranging from 1 to 10 years. Most of our leases do not have an option to extend the lease period beyond the stated term unless the new term is agreed to by both parties. They also do not have an early termination clause included. Our operating lease agreements do not contain any material restrictive covenants. Some of our operating lease agreements contain variable payment provisions that provide for rental increases based on consumer price indices. The change in rent expense resulting from changes in these indices are included within variable rent. We also have finance leases for equipment which have remaining terms ranging from 1 to 3 years. These lease agreements are for general office equipment with a 5-year useful life. These lease agreements do not have an option to extend the lease beyond the stated terms nor do they have an early termination clause. These lease agreements do not have any variable payment provisions included. The finance lease costs consist of interest expense and amortization, and are included primarily in selling, general and administrative expense in our consolidated statements of operations. The discount rate for both our operating and finance leases was not readily determinable in the specific lease agreements. As a result, our incremental borrowing rate was used as the discount rate when establishing the ROU assets and corresponding lease liabilities. As of June 30, 2021, we had no operating or finance leases that have not yet commenced. Rent expense is recognized on a straight-line basis over the life of the lease. Rent expense consists of the following: Three Months Ended June 30, Six months ended June 30, (in thousands) 2021 2020 2021 2020 Operating lease costs $ 741 $ 367 $ 1,450 $ 779 Variable rent costs (28) 25 (57) (14) Total rent expense $ 713 $ 392 $ 1,393 $ 765 Future minimum lease payments under non-cancelable operating and finance leases were as follows as of June 30, 2021 (amounts in thousands): Operating Leases Finance Leases Year Ending December 31, 2021 - remaining 6 months $ 1,561 $ 26 2022 2,817 53 2023 2,402 53 2024 1,902 52 2025 1,230 48 2026 and beyond 3,883 — Total future minimum lease payments 13,795 232 Less: interest 2,255 12 Total lease liabilities $ 11,540 $ 220 Current lease liability $ 2,314 $ 48 Long-term lease liability 9,226 172 Total lease liabilities $ 11,540 $ 220 Other information related to leases is as follows: Three Months Ended June 30, Six months ended June 30, (in thousands, except weighted-average data) 2021 2020 2021 2020 Finance lease cost: Amortization of right-of-use assets $ 13 $ 14 $ 27 $ 27 Interest on lease liabilities (1) (1) (3) (1) Total finance lease cost $ 12 $ 13 $ 24 $ 26 Other information: Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 741 $ 367 $ 1,450 $ 744 Finance cash flows from finance leases $ 12 $ 13 $ 24 $ 26 Right-of-use assets obtained in exchange for new operating lease liabilities $ — $ 5,531 $ — $ 5,531 Right-of-use assets obtained in exchange for new finance lease liabilities $ — $ — $ — $ — Weighted-average remaining lease term (years) - operating leases 6.1 8.3 6.1 3.7 Weighted-average remaining lease term (years) - finance leases 4.4 1.9 4.4 1.9 Weighted-average discount rate - operating leases 6 % 6 % 6 % 6 % Weighted-average discount rate - finance leases 2 % 7 % 2 % 7 %

Capital Stock and Share-Based C

Capital Stock and Share-Based Compensation	6 Months Ended
	Jun. 30, 2021
Equity [Abstract]
Capital Stock and Share-Based Compensation	Capital Stock and Share-Based Compensation Stock Options During the six months ended June 30, 2021, we granted options to purchase 80,735 shares of our common stock. The general terms of the stock options are similar to awards previously granted by us. There were no stock options granted during the three months ended June 30, 2021. The fair values of stock options granted were estimated using the following weighted-average assumptions: Six Months Ended June 30, 2021 Risk-free rate 0.98 % Expected volatility 55.22 % Expected term (in years) 7 The weighted average fair value of stock options granted during the six months ended June 30, 2021 was $5.24 per share. The fair value of each stock option was determined using the Black-Scholes model. For the three months ended June 30, 2021 and six months ended June 30, 2021, we recognized $0.3 million and $0.5 million, respectively, in share-based compensation expense related to stock options, which is included in our selling, general and administrative expense in the accompanying consolidated interim financial statements. We expect to recognize $1.8 million in share-based compensation expense over the weighted-average remaining service period of 1.9 years for stock options outstanding as of June 30, 2021. Restricted Stock Units During the three and six months ended June 30, 2021, we granted 55,000 and 134,250 time-based restricted stock units ("RSUs"), respectively. The general terms of the RSUs are similar to awards previously granted by us. The weighted average fair value of the time-based RSUs granted during the three and six months ended June 30, 2021 was $11.29 and $11.35 per share, respectively. The fair value of each RSU was determined based on the market price of our stock on the date of grant. In addition, pursuant to our Deferred Compensation Plan, non-employee directors can elect to defer the receipt of some or all of the equity compensation that they receive for board and committee service. During the three months ended June 30, 2021 and six months ended June 30, 2021, we granted 4,259 and 8,917 RSUs pursuant to the Deferred Compensation Plan, respectively. The general terms of these RSUs are similar to awards previously granted by us. The weighted average fair value of these RSUs granted during the three and six months ended June 30, 2021 was $10.83 and $10.09 per share, respectively. The fair value of each RSU was determined based on the market price of our stock on the date of grant. For each of the three and six months ended June 30, 2021 we recognized $0.3 million and $0.6 million, respectively, in share-based compensation expense related to RSUs, respectively, which is included in our selling, general and administrative expense in the accompanying consolidated interim financial statements. We expect to recognize $2.3 million in share-based compensation expense over the weighted-average remaining service period of 2.1 years for RSUs outstanding as of June 30, 2021. Employee Stock Purchase Plan ("ESPP") For the three and six months ended June 30, 2021, we recognized $0.1 million and $0.2 million, respectively, in share-based compensation expense related to the ESPP, which is included in our selling, general and administrative expense in the accompanying statement of operations. There was no share-based compensation expense related to the ESPP for the six months ended June 30, 2020.

Revenue Recognition

Revenue Recognition	6 Months Ended
	Jun. 30, 2021
Revenue from Contract with Customer [Abstract]
Revenue Recognition	Revenue Recognition Disaggregation of Revenue We disaggregate our revenue from contracts with customers by geographic locations, customer type, contract type, timing of recognition, and major categories for each of our segments, as we believe it best depicts how the nature, amount, timing and uncertainty of our revenue and cash flows are affected by economic factors. We disaggregate revenue on the basis of where the physical goods are shipped. We also classify revenue by the customer type of entity for which it does business, which is an indicator of the diversity of our client base. We attribute revenues generated from being a subcontractor to a commercial company as government revenue when the ultimate client is a government agency or department. Disaggregation by contract mix provides insight in terms of the degree of performance risk that we have assumed. Fixed-price contracts are considered to provide the highest amount of performance risk as we are required to deliver a scope of work or level of effort for a negotiated fixed price. Cost-based contracts are considered to provide the lowest amount of performance risk since we are generally reimbursed for all contract costs incurred in performance of contract deliverables with only the amount of incentive or award fees (if applicable) dependent on the achievement of negotiated performance requirements. By classifying revenue by major product and service, we attribute revenue from a client to the major product or service that we believe to be the client's primary market. The details are listed in the table below for the three and six months ended June 30, 2021 and 2020: Three Months Ended June 30, 2021 2020 (in thousands) Lightwave Luna Labs Total Lightwave Luna Labs Total (unaudited) Total Revenue by Geographic Location United States $ 11,536 $ 5,850 $ 17,386 $ 7,041 $ 5,643 $ 12,684 Asia 3,596 2 3,598 3,568 — 3,568 Europe 4,509 66 4,575 1,854 — 1,854 Canada, Central and South America 2,324 54 2,378 258 — 258 All Others — — — 212 — 212 Total $ 21,965 $ 5,972 $ 27,937 $ 12,933 $ 5,643 $ 18,576 Total Revenue by Major Customer Type Sales to the U.S. government $ 2,502 $ 5,466 $ 7,968 $ 1,727 $ 5,101 $ 6,828 U.S. direct commercial sales and other 9,033 384 9,417 5,314 542 5,856 Foreign commercial sales & other 10,430 122 10,552 5,892 — 5,892 Total $ 21,965 $ 5,972 $ 27,937 $ 12,933 $ 5,643 $ 18,576 Total Revenue by Contract Type Fixed-price contracts $ 20,732 $ 3,324 $ 24,056 $ 12,160 $ 2,963 $ 15,123 Cost-type contracts 1,233 2,648 3,881 773 2,680 3,453 Total $ 21,965 $ 5,972 $ 27,937 $ 12,933 $ 5,643 $ 18,576 Total Revenue by Timing of Recognition Goods transferred at a point in time $ 18,099 $ 506 $ 18,605 $ 11,275 $ 354 $ 11,629 Goods/services transferred over time 3,866 5,466 9,332 1,658 5,289 6,947 Total $ 21,965 $ 5,972 $ 27,937 $ 12,933 $ 5,643 $ 18,576 Total Revenue by Major Products/Services Technology development $ 2,027 $ 5,466 $ 7,493 $ 1,527 $ 5,289 $ 6,816 Test, measurement and sensing systems 19,485 — 19,485 11,275 — 11,275 Other 453 506 959 131 354 485 Total $ 21,965 $ 5,972 $ 27,937 $ 12,933 $ 5,643 $ 18,576 Six Months Ended June 30, 2021 2020 (in thousands) Lightwave Luna Labs Total Lightwave Luna Labs Total (unaudited) Total Revenue by Geographic Location United States 22,115 11,113 $ 33,228 12,894 11,230 $ 24,124 Asia 7,268 2 7,270 7,324 — 7,324 Europe 8,486 93 8,579 3,567 — 3,567 Canada, Central and South America 5,093 66 5,159 463 — 463 All Others — — — 239 — 239 Total $ 42,962 $ 11,274 $ 54,236 $ 24,487 $ 11,230 $ 35,717 Total Revenue by Major Customer Type Sales to the U.S. government 4,916 10,392 $ 15,308 3,520 10,112 $ 13,632 U.S. direct commercial sales and other 17,199 721 17,920 9,373 1,118 10,491 Foreign commercial sales & other 20,847 161 21,008 11,594 — 11,594 Total $ 42,962 $ 11,274 $ 54,236 24,487 11,230 $ 35,717 Total Revenue by Contract Type Fixed-price contracts 41,778 6,556 $ 48,334 22,950 6,267 $ 29,217 Cost-type contracts 1,184 4,718 5,902 1,537 4,963 6,500 Total $ 42,962 $ 11,274 $ 54,236 $ 24,487 $ 11,230 $ 35,717 Total Revenue by Timing of Recognition Goods transferred at a point in time 34,939 816 $ 35,755 21,036 835 $ 21,871 Goods/services transferred over time 8,023 10,458 18,481 3,451 10,395 13,846 Total $ 42,962 $ 11,274 $ 54,236 24,487 11,230 $ 35,717 Total Revenue by Major Products/Services Technology development 4,167 10,458 $ 14,625 3,235 10,395 $ 13,630 Test, measurement and sensing systems 38,003 — 38,003 21,036 — 21,036 Other 792 816 1,608 216 835 1,051 Total $ 42,962 $ 11,274 $ 54,236 $ 24,487 $ 11,230 $ 35,717 Contract Balances Our contract assets consist of unbilled amounts for technology development contracts as well as custom product contracts. Also included in contract assets are royalty revenue and carrying amounts of right of return inventory. Long-term contract assets include the fee withholding on cost reimbursable contracts that will not be billed within a year. Contract liabilities include excess billings, subcontractor accruals, warranty expense, extended warranty revenue, right of return refund, and customer deposits. The following table shows the components of our contract balances as of June 30, 2021 and December 31, 2020: (in thousands) June 30, 2021 December 31, 2020 Contract assets $ 6,857 $ 7,517 Contract liabilities 6,425 7,095 Net contract assets $ 432 $ 422 Performance Obligations

Reportable Segments

Reportable Segments	6 Months Ended
	Jun. 30, 2021
Segment Reporting [Abstract]
Reportable Segments	Reportable Segments We have two operating and reportable segments: Lightwave and Luna Labs. The Lightwave segment develops, manufactures and markets distributed fiber optic sensing products and fiber optic communications test and control products. The Luna Labs segment performs applied research principally in the areas of sensing and instrumentation, advanced materials and health sciences. Through June 30, 2021, our Chief Executive Officer and his direct reports (collectively represented our CODM), evaluated segment performance based primarily on revenues and operating income or loss. The accounting policies of our segments are the same as those described in the summary of significant accounting policies (see Note 1 to our Financial Statements, “Organization and Summary of Significant Accounting Policies,” presented in our Annual Report on Form 10-K as filed with the SEC on March 12, 2021). The table below presents revenues and operating income/(loss) for reportable segments: Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 (in thousands) (unaudited) (unaudited) Revenues: Lightwave $ 21,965 $ 12,933 $ 42,962 $ 24,487 Luna Labs 5,972 5,643 11,274 11,230 Total revenues $ 27,937 $ 18,576 $ 54,236 $ 35,717 Lightwave operating loss $ (887) $ 642 $ (1,197) $ 1,145 Luna Labs operating (loss)/income (115) 1,168 (599) 1,055 Total operating (loss)/income $ (1,002) $ 1,810 $ (1,796) $ 2,200 Depreciation, Lightwave $ 328 $ 217 $ 682 $ 417 Depreciation, Luna Labs $ 28 $ 27 $ 62 $ 74 Amortization, Lightwave $ 766 $ 408 $ 1,592 $ 813 Amortization, Luna Labs $ 7 $ 32 $ 24 $ 59 The table below presents assets for reportable segments: June 30, December 31, (in thousands) (unaudited) Total segment assets: Lightwave $ 114,746 $ 110,446 Luna Labs 14,581 20,556 Total assets $ 129,327 $ 131,002 Property plant and equipment, and intangible assets, Lightwave $ 40,782 $ 40,995 Property plant and equipment, and intangible assets, Luna Labs $ 443 $ 543 The U.S. government accounted for 29% and 37% of total consolidated revenues for the three months ended June 30, 2021 and 2020, respectively, and 28% and 38% of total consolidated revenues for the six months ended June 30, 2021 and 2020, respectively.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income TaxesOur provision for income taxes is based upon the estimated annual effective tax rate for the year applied to the current period income plus the tax effect of any significant or unusual items, discrete events or changes in tax law. Fluctuations in the distribution of pre-tax income among our operating subsidiaries can lead to fluctuations of the effective tax rate in the consolidated financial statements. We and our subsidiaries file U.S. federal income tax returns and income tax returns in various state, local, and foreign jurisdictions. For the six months ended June 30, 2021, our effective income tax rate was 73.38% compared to 25.53% for the six months ended June 30, 2020. Our effective tax rate has fluctuated primarily due to permanent differences related to equity compensation. The effective tax rate for 2021 differs from the federal statutory rate of 21%, primarily as a result of permanent differences related to equity compensation. The effective tax rate for 2020 differed from the federal statutory rate of 21%, primarily as a result of permanent differences related to equity compensation and state tax expense.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies We are from time to time involved in certain legal proceedings in the ordinary course of conducting our business. While the ultimate liability pursuant to these actions cannot currently be determined, we believe it is not reasonably possible that these legal proceedings will have a material adverse effect on our financial position or results of operations. In December 2018, we received a notice of claim (the "Claim") from Macom Technology Solutions, Inc. ("Macom"), who acquired our HSOR business in August 2017 pursuant to an asset purchase agreement. Under the asset purchase agreement, we agreed to indemnify Macom for certain matters, including, among other things, the collection of accounts receivable from certain major customers, and placed $4.0 million of the purchase price into an escrow account for the potential settlement of any valid indemnity claims. As of December 31, 2019, $1.5 million of the escrow had been received with $2.5 million remaining in escrow pending resolution of the dispute. In March 2020, we settled the dispute resulting in us receiving $0.6 million and Macom receiving $1.9 million. For the six months ended June 30, 2020, we have recorded a loss from discontinued operations of $1.4 million, net of income tax benefit, to reflect the settlement of the dispute. We executed non-cancelable purchase orders totaling $1.5 million in the third quarter of 2020 and $1.6 million in the fourth quarter of 2020 for multiple shipments of tunable lasers to be delivered over an 12-month period. At June 30, 2021, approximately $1.4 million of these commitments remained and are expected to be delivered by December 31, 2021. We have entered into indemnification agreements with our officers and directors, to the extent permitted by law, pursuant to which we have agreed to reimburse the officers and directors for legal expenses in the event of litigation and regulatory matters. The terms of these indemnification agreements provide for no limitation to the maximum potential future payments. We have a directors and officers insurance policy that may, in certain instances, mitigate the potential liability and payments.

Basis of Presentation and Sig_2

Basis of Presentation and Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2021
Accounting Policies [Abstract]
Nature of Operations	Nature of Operations Luna Innovations Incorporated (“we,” “Luna Innovations” or the “Company”), headquartered in Roanoke, Virginia, was incorporated in the Commonwealth of Virginia in 1990 and reincorporated in the State of Delaware in April 2003. We are a leader in advanced optical technology, providing high performance fiber optic test, measurement and control products for the telecommunications and photonics industries, and distributed fiber optic sensing solutions that measure, or "sense" the structures for industries ranging from aerospace, automotive, oil and gas, security and infrastructure. Our communications test and control products help customers test their fiber optic networks and assemblies with speed and precision in both lab and production environments, accelerating the development of fiber optic products and assuring accurate testing of optical components like photonic integrated circuits ("PICs") and coherent receivers, which are both critical elements of meeting the world’s exponentially growing demand for bandwidth. Our distributed fiber optic sensing products help designers and manufacturers more efficiently develop new and innovative products by measuring stress, strain, and temperature at a high resolution for new designs or manufacturing processes. In addition, our distributed fiber optic sensing products ensure the safety and structural integrity or operational health of critical assets in the field, by monitoring stress, strain, and vibration in large civil and industrial infrastructure such as bridges, roads, pipelines and borders. We also provide applied research services, typically under research programs funded by the U.S. government, in areas of advanced materials, sensing, and healthcare applications. Our business model is designed to accelerate the process of bringing new and innovative products to market. We use our in-house technical expertise across a range of technologies to perform applied research services for companies and for government funded projects. We continue to invest in product development and commercialization, which we anticipate will lead to increased product sales growth.
Unaudited Interim Financial Information	Unaudited Interim Financial Information The accompanying unaudited consolidated interim financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial statements and Article 10 of Regulation S-X of the Securities Exchange Act of 1934, as amended. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for annual financial statements. The unaudited consolidated interim financial statements have been prepared on the same basis as the annual financial statements and in the opinion of management reflect all adjustments, consisting of only normal recurring accruals considered necessary to present fairly our financial position at June 30, 2021, results of operations, comprehensive (loss)/income and changes in stockholders' equity for the three and six months ended June 30, 2021 and 2020, and cash flows for the six months ended June 30, 2021 and 2020. The results of operations for the three and six months ended June 30, 2021, are not necessarily indicative of the results that may be expected for the year ending December 31, 2021. The consolidated balance sheet as of December 31, 2020 was derived from our audited consolidated financial statements. The COVID-19 pandemic has resulted in a global slowdown of economic activity. While the impact of the COVID-19 pandemic to our business and operating results presents additional uncertainty, we continue to use reasonably available information to assess certain accounting matters including, but not limited to, accounts receivable, inventory and the carrying value of goodwill and other long-lived tangible and intangible assets. While the assessments have not resulted in any material impacts to our financial statements as of June 30, 2021, we believe the full impact of the pandemic remains uncertain and ongoing developments related to the pandemic may cause material impacts to our consolidated financial statements. The consolidated interim financial statements, including our significant accounting policies, should be read in conjunction with the audited Consolidated Financial Statements and the notes thereto for the year ended December 31, 2020, included in our Annual Report on Form 10-K as filed with the Securities and Exchange Commission (“SEC”) on March 12, 2021.
Goodwill and Intangible Assets	Goodwill and Intangible Assets Goodwill and intangible assets with indefinite lives are not amortized but are tested for impairment on an annual basis, as of October 1 of each year, or whenever events or changes in circumstances indicate that the carrying amount of these assets
Fair Value Measurements	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 the principal or most advantageous market in an orderly transaction between marketplace participants. Various valuation approaches can be used to determine fair value, each requiring different valuation inputs. The following hierarchy classifies the inputs used to determine fair value into three levels: • Level 1—Quoted prices for identical instruments in active markets. • Level 2—Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which significant value drivers are observable. • Level 3—Valuations derived from valuation techniques in which significant value drivers are unobservable.
Reportable Segments	Reportable Segments We have two operating and reportable segments: Lightwave and Luna Labs. During the three months ended June 30, 2020, we changed our reportable segments to Lightwave and Luna Labs to align with how our Chief Operating Decision Maker (CODM) evaluates segment performance and allocates resources to the segments. Prior to the three months ended June 30, 2020, we reported under two different reporting segments, Products and Licensing and Technology Development. We have reflected these new segment measures beginning in the three months ended June 30, 2020 and prior periods have been restated for comparability. The Lightwave segment develops, manufactures and markets distributed fiber optic sensing products and fiber optic communications test and control products. The Luna Labs segment performs applied research principally in the areas of sensing and instrumentation, advanced materials and health sciences.
Net Income Per Share	Net Income Per ShareBasic per share data is computed by dividing our net income by the weighted average number of shares outstanding during the period. Diluted per share data is computed by dividing net income by the weighted average shares outstanding during the period increased to include, if dilutive, the number of additional common share equivalents that would have been outstanding if potential shares of common stock had been issued using the treasury stock method. Diluted per share data would also include the potential common share equivalents relating to convertible securities by application of the if-converted method.
Foreign Currency	Foreign CurrencyFor our non-U.S. dollar functional currency subsidiaries, assets and liabilities are translated into U.S. dollars using fiscal period end exchange rates. Sales and expenses are translated at average monthly exchange rates. Foreign currency translation gains and losses are included as a component of accumulated other comprehensive loss within equity. Gains and losses resulting from foreign currency transactions are included in earnings.
Recently Adopted Accounting Pronouncements/Recently Issued Pronouncements, net yet adopted	Recently Adopted Accounting Pronouncements In December 2019, the FASB issued ASU 2019-12 Simplifying the Accounting for Income Taxes , which removes certain exceptions to the general principles of the accounting for income taxes and also improves consistent application of and simplification of other areas when accounting for income taxes. The guidance is effective for us beginning in the first quarter of fiscal year 2021. We adopted ASU 2019-12, effective January 1, 2021. The adoption of ASU 2019-12 did not have a significant impact on our consolidated financial statements. Recently Issued Pronouncements, Not Yet Adopted In June 2016, the FASB issued ASU 2016-13 Financial Instruments - Credit Losses (Topic 326) - Measurement of Credit Losses on Financial Instruments, which requires companies to measure financial assets at an amortized cost basis to be presented at the net amount expected to be collected. The new accounting rules eliminate the probable initial recognition threshold and, instead, reflect an entity's current estimate of all expected credit losses. ASU 2016-13 is applicable to our trade receivables. This pronouncement was amended under ASU 2019-10 to allow an extension on the adoption date for entities that qualify as a small reporting company. We have elected this extension and the effective date for us to adopt this standard will be for fiscal years beginning after December 15, 2022. We are currently in the process of evaluating the impact of ASU 2016-13, but we do not expect the adoption of this new accounting rule to have a significant impact on our consolidated financial statements.

Business Acquisitions (Tables)

Business Acquisitions (Tables)	6 Months Ended
	Jun. 30, 2021
Business Combination and Asset Acquisition [Abstract]
Allocation of Purchase Consideration	The following table summarizes the preliminary allocation of the purchase consideration of the OptaSense acquisition (excluding cash of $5.2 million): (in thousands) Accounts receivable $ 4,534 Contract assets 1,513 Inventory 12,793 Other current assets 1,026 Property and equipment 1,247 Identifiable intangible assets 11,263 Goodwill 8,520 Right of use assets 2,151 Other long-term assets 22 Accounts payable and accrued expenses (3,925) Contract liabilities (3,259) Other current liabilities (862) Long-term operating lease liability (1,335) Total purchase consideration $ 33,688
Schedule of Preliminary Identifiable Intangible Assets Acquired and their Estimated Lives	The identifiable intangible assets and their estimated useful lives were as follows: Estimated (in thousands) Useful Life OptaSense Developed technology 10 years $ 7,379 Trade names and trademarks 15 years 2,580 Backlog 3 years 699 Customer relationships 5 years 605 $ 11,263
Unaudited Pro Forma Financial Information	The following unaudited pro forma financial information presents combined results of operations for the period presented as if the acquisition of OptaSense had been completed on January 1, 2019. The pro forma information includes adjustments to amortization expense for the intangible assets acquired and interest expense for the additional debt used to partially fund the acquisition price. The pro forma data are for informational purposes only and are not necessarily indicative of the consolidated results of operations or the combined business had the acquisition of OptaSense occurred on January 1, 2019, or the results of future operations of the combined business. For instance, planned or expected operational synergies following the acquisition are not reflected in the pro forma information. Consequently, actual results will differ from the unaudited pro forma information presented below. Three Months Ended June 30, 2020 Six Months Ended June 30, 2020 (in thousands) Revenue $ 22,847 $ 47,713 Loss from continuing operations $ (1,507) $ (177)

Intangible assets, net (Tables)

Intangible assets, net (Tables)	6 Months Ended
	Jun. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Intangible Assets	Intangible assets, net at June 30, 2021 and December 31, 2020 consisted of the following: Estimated Life June 30, 2021 December 31, 2020 (in thousands) Patent costs 1 - 18 years $ 5,797 $ 5,702 Developed technology 5 - 10 years 17,608 17,344 In-process research & development N/A 1,580 1,580 Customer base 5-7 years 1,307 1,302 Trade names 3 - 15 years 3,138 3,122 Backlog 3 years 701 696 30,131 29,746 Accumulated amortization (11,244) (9,637) $ 18,887 $ 20,109
Estimated Aggregate Amortization Based on Net Value of Intangible Assets	Estimated aggregate amortization, based on the net value of intangible assets at June 30, 2021, for each of the next five years and beyond is as follows (amounts in thousands): Year Ending December 31, 2021 - remaining 6 months $ 1,695 2022 2,924 2023 2,827 2024 2,416 2025 2,082 2026 & beyond 6,943 Total $ 18,887

Inventory (Tables)

Inventory (Tables)	6 Months Ended
	Jun. 30, 2021
Inventory Disclosure [Abstract]
Components of Inventory	Components of inventory were as follows: June 30, December 31, (in thousands) Finished goods $ 12,894 $ 11,547 Work-in-process 1,217 1,425 Raw materials 11,468 10,625 Total inventory $ 25,579 $ 23,597

Accrued Liabilities (Tables)

Accrued Liabilities (Tables)	6 Months Ended
	Jun. 30, 2021
Payables and Accruals [Abstract]
Schedule of Accrued Liabilities	Accrued liabilities at June 30, 2021 and December 31, 2020 consisted of the following: June 30, 2021 December 31, 2020 (in thousands) Accrued compensation $ 8,235 $ 9,103 Contingent consideration 225 225 Accrued professional fees 1,170 825 Accrued income tax 452 281 Accrued interest 21 42 Accrued royalties 454 456 Accrued liabilities - other 614 1,227 Total accrued liabilities $ 11,171 $ 12,159

Debt (Tables)

Debt (Tables)	6 Months Ended
	Jun. 30, 2021
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	Long-term debt consisted of the following: (in thousands) June 30, 2021 December 31, 2020 Term Loan (net of debt issuance costs of $55 and $66, 2.48% and 2.48% at June 30, 2021 and December 31, 2020, respectively) $ 10,362 $ 12,434 Revolving Loan (2.48% at June 30, 2021 and December 31, 2020) 7,550 7,550 17,912 19,984 Less: Current portion of long-term debt obligations (4,167) (4,167) Long-term debt obligations $ 13,745 $ 15,817
Schedule of Maturities of Long-term Debt	Maturities on debt are as follows ( in thousands) : Year Ending December 31, Amount 2021 - remaining 6 months $ 2,083 2022 4,167 2023 11,662 Total $ 17,912
Summary of Debt Interest Expense	Interest expense, net for the three and six months ended June 30, 2021 and 2020 consisted of the following: Three Months Ended June 30, Six Months Ended June 30, (in thousands) 2021 2020 2021 2020 Interest expense on Term Loan $ 66 $ — $ 142 $ — Interest expense on Revolving Line 45 — 75 — Amortization of debt issuance costs 11 — 22 — Other interest expense 1 1 27 1 Interest income (1) (1) Total interest expense, net $ 122 $ 1 $ 265 $ 1

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2021
Leases [Abstract]
Schedule of other information related to leases	Rent expense is recognized on a straight-line basis over the life of the lease. Rent expense consists of the following: Three Months Ended June 30, Six months ended June 30, (in thousands) 2021 2020 2021 2020 Operating lease costs $ 741 $ 367 $ 1,450 $ 779 Variable rent costs (28) 25 (57) (14) Total rent expense $ 713 $ 392 $ 1,393 $ 765 Three Months Ended June 30, Six months ended June 30, (in thousands, except weighted-average data) 2021 2020 2021 2020 Finance lease cost: Amortization of right-of-use assets $ 13 $ 14 $ 27 $ 27 Interest on lease liabilities (1) (1) (3) (1) Total finance lease cost $ 12 $ 13 $ 24 $ 26 Other information: Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 741 $ 367 $ 1,450 $ 744 Finance cash flows from finance leases $ 12 $ 13 $ 24 $ 26 Right-of-use assets obtained in exchange for new operating lease liabilities $ — $ 5,531 $ — $ 5,531 Right-of-use assets obtained in exchange for new finance lease liabilities $ — $ — $ — $ — Weighted-average remaining lease term (years) - operating leases 6.1 8.3 6.1 3.7 Weighted-average remaining lease term (years) - finance leases 4.4 1.9 4.4 1.9 Weighted-average discount rate - operating leases 6 % 6 % 6 % 6 % Weighted-average discount rate - finance leases 2 % 7 % 2 % 7 %
Schedule of future operating lease payments	Future minimum lease payments under non-cancelable operating and finance leases were as follows as of June 30, 2021 (amounts in thousands): Operating Leases Finance Leases Year Ending December 31, 2021 - remaining 6 months $ 1,561 $ 26 2022 2,817 53 2023 2,402 53 2024 1,902 52 2025 1,230 48 2026 and beyond 3,883 — Total future minimum lease payments 13,795 232 Less: interest 2,255 12 Total lease liabilities $ 11,540 $ 220 Current lease liability $ 2,314 $ 48 Long-term lease liability 9,226 172 Total lease liabilities $ 11,540 $ 220
Schedule of future finance lease payments	Future minimum lease payments under non-cancelable operating and finance leases were as follows as of June 30, 2021 (amounts in thousands): Operating Leases Finance Leases Year Ending December 31, 2021 - remaining 6 months $ 1,561 $ 26 2022 2,817 53 2023 2,402 53 2024 1,902 52 2025 1,230 48 2026 and beyond 3,883 — Total future minimum lease payments 13,795 232 Less: interest 2,255 12 Total lease liabilities $ 11,540 $ 220 Current lease liability $ 2,314 $ 48 Long-term lease liability 9,226 172 Total lease liabilities $ 11,540 $ 220

Capital Stock and Share-Based_2

Capital Stock and Share-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2021
Equity [Abstract]
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	The fair values of stock options granted were estimated using the following weighted-average assumptions: Six Months Ended June 30, 2021 Risk-free rate 0.98 % Expected volatility 55.22 % Expected term (in years) 7

Revenue Recognition (Tables)

Revenue Recognition (Tables)	6 Months Ended
	Jun. 30, 2021
Revenue from Contract with Customer [Abstract]
Schedule of Disaggregation of Revenue	The details are listed in the table below for the three and six months ended June 30, 2021 and 2020: Three Months Ended June 30, 2021 2020 (in thousands) Lightwave Luna Labs Total Lightwave Luna Labs Total (unaudited) Total Revenue by Geographic Location United States $ 11,536 $ 5,850 $ 17,386 $ 7,041 $ 5,643 $ 12,684 Asia 3,596 2 3,598 3,568 — 3,568 Europe 4,509 66 4,575 1,854 — 1,854 Canada, Central and South America 2,324 54 2,378 258 — 258 All Others — — — 212 — 212 Total $ 21,965 $ 5,972 $ 27,937 $ 12,933 $ 5,643 $ 18,576 Total Revenue by Major Customer Type Sales to the U.S. government $ 2,502 $ 5,466 $ 7,968 $ 1,727 $ 5,101 $ 6,828 U.S. direct commercial sales and other 9,033 384 9,417 5,314 542 5,856 Foreign commercial sales & other 10,430 122 10,552 5,892 — 5,892 Total $ 21,965 $ 5,972 $ 27,937 $ 12,933 $ 5,643 $ 18,576 Total Revenue by Contract Type Fixed-price contracts $ 20,732 $ 3,324 $ 24,056 $ 12,160 $ 2,963 $ 15,123 Cost-type contracts 1,233 2,648 3,881 773 2,680 3,453 Total $ 21,965 $ 5,972 $ 27,937 $ 12,933 $ 5,643 $ 18,576 Total Revenue by Timing of Recognition Goods transferred at a point in time $ 18,099 $ 506 $ 18,605 $ 11,275 $ 354 $ 11,629 Goods/services transferred over time 3,866 5,466 9,332 1,658 5,289 6,947 Total $ 21,965 $ 5,972 $ 27,937 $ 12,933 $ 5,643 $ 18,576 Total Revenue by Major Products/Services Technology development $ 2,027 $ 5,466 $ 7,493 $ 1,527 $ 5,289 $ 6,816 Test, measurement and sensing systems 19,485 — 19,485 11,275 — 11,275 Other 453 506 959 131 354 485 Total $ 21,965 $ 5,972 $ 27,937 $ 12,933 $ 5,643 $ 18,576 Six Months Ended June 30, 2021 2020 (in thousands) Lightwave Luna Labs Total Lightwave Luna Labs Total (unaudited) Total Revenue by Geographic Location United States 22,115 11,113 $ 33,228 12,894 11,230 $ 24,124 Asia 7,268 2 7,270 7,324 — 7,324 Europe 8,486 93 8,579 3,567 — 3,567 Canada, Central and South America 5,093 66 5,159 463 — 463 All Others — — — 239 — 239 Total $ 42,962 $ 11,274 $ 54,236 $ 24,487 $ 11,230 $ 35,717 Total Revenue by Major Customer Type Sales to the U.S. government 4,916 10,392 $ 15,308 3,520 10,112 $ 13,632 U.S. direct commercial sales and other 17,199 721 17,920 9,373 1,118 10,491 Foreign commercial sales & other 20,847 161 21,008 11,594 — 11,594 Total $ 42,962 $ 11,274 $ 54,236 24,487 11,230 $ 35,717 Total Revenue by Contract Type Fixed-price contracts 41,778 6,556 $ 48,334 22,950 6,267 $ 29,217 Cost-type contracts 1,184 4,718 5,902 1,537 4,963 6,500 Total $ 42,962 $ 11,274 $ 54,236 $ 24,487 $ 11,230 $ 35,717 Total Revenue by Timing of Recognition Goods transferred at a point in time 34,939 816 $ 35,755 21,036 835 $ 21,871 Goods/services transferred over time 8,023 10,458 18,481 3,451 10,395 13,846 Total $ 42,962 $ 11,274 $ 54,236 24,487 11,230 $ 35,717 Total Revenue by Major Products/Services Technology development 4,167 10,458 $ 14,625 3,235 10,395 $ 13,630 Test, measurement and sensing systems 38,003 — 38,003 21,036 — 21,036 Other 792 816 1,608 216 835 1,051 Total $ 42,962 $ 11,274 $ 54,236 $ 24,487 $ 11,230 $ 35,717
Schedule of components of contract balances	The following table shows the components of our contract balances as of June 30, 2021 and December 31, 2020: (in thousands) June 30, 2021 December 31, 2020 Contract assets $ 6,857 $ 7,517 Contract liabilities 6,425 7,095 Net contract assets $ 432 $ 422

Reportable Segments (Tables)

Reportable Segments (Tables)	6 Months Ended
	Jun. 30, 2021
Segment Reporting [Abstract]
Schedule of Revenues, Operating Income (Loss) and Assets for Reportable Segments	The table below presents revenues and operating income/(loss) for reportable segments: Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 (in thousands) (unaudited) (unaudited) Revenues: Lightwave $ 21,965 $ 12,933 $ 42,962 $ 24,487 Luna Labs 5,972 5,643 11,274 11,230 Total revenues $ 27,937 $ 18,576 $ 54,236 $ 35,717 Lightwave operating loss $ (887) $ 642 $ (1,197) $ 1,145 Luna Labs operating (loss)/income (115) 1,168 (599) 1,055 Total operating (loss)/income $ (1,002) $ 1,810 $ (1,796) $ 2,200 Depreciation, Lightwave $ 328 $ 217 $ 682 $ 417 Depreciation, Luna Labs $ 28 $ 27 $ 62 $ 74 Amortization, Lightwave $ 766 $ 408 $ 1,592 $ 813 Amortization, Luna Labs $ 7 $ 32 $ 24 $ 59 The table below presents assets for reportable segments: June 30, December 31, (in thousands) (unaudited) Total segment assets: Lightwave $ 114,746 $ 110,446 Luna Labs 14,581 20,556 Total assets $ 129,327 $ 131,002 Property plant and equipment, and intangible assets, Lightwave $ 40,782 $ 40,995 Property plant and equipment, and intangible assets, Luna Labs $ 443 $ 543

Basis of Presentation and Sig_3

Basis of Presentation and Significant Accounting Policies (Details) shares in Millions	Dec. 01, 2020	Jun. 30, 2021shares	Jun. 30, 2020shares	Mar. 31, 2020segment	Jun. 30, 2021segmentshares	Jun. 30, 2020shares
Debt Instrument [Line Items]
Number of operating segments					2
Number of reportable segments				2	2
Common stock equivalents included in diluted per share data (in shares) | shares		2	2		2.1	1.9
London Interbank Offered Rate (LIBOR) | PNC Bank Facility | Minimum | Term Loan
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.75%				1.75%
London Interbank Offered Rate (LIBOR) | PNC Bank Facility | Maximum | Term Loan
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	2.25%				2.25%

Business Acquisitions - Additio

Business Acquisitions - Additional Information (Details) $ in Thousands, £ in Millions	Dec. 03, 2020USD ($)	Dec. 03, 2020GBP (£)	Oct. 29, 2020USD ($)	Jun. 30, 2021USD ($)	Dec. 31, 2020USD ($)
Business Acquisition [Line Items]
Goodwill adjustment				$ 900
Goodwill				19,155	$ 18,121
New Ride Technologies
Business Acquisition [Line Items]
Aggregate consideration			$ 600
Cash consideration			400
Contingent obligation			200
Potential maximum obligation of contingent consideration			200
Goodwill			20
OptaSense Holdings Limited
Business Acquisition [Line Items]
Aggregate consideration	$ 38,900	£ 29
Goodwill adjustment				$ 900
Goodwill			$ 8,520
Developed technology
Business Acquisition [Line Items]
Discount rate used to estimate fair value of acquired finite-lived intangible assets			17.50%
Trade names and trademarks
Business Acquisition [Line Items]
Discount rate used to estimate fair value of acquired finite-lived intangible assets			17.50%
Backlog
Business Acquisition [Line Items]
Discount rate used to estimate fair value of acquired finite-lived intangible assets			16.50%
Customer relationships
Business Acquisition [Line Items]
Discount rate used to estimate fair value of acquired finite-lived intangible assets			17.50%

Business Acquisitions - Allocat

Business Acquisitions - Allocation of Purchase Consideration (Details) - USD ($) $ in Thousands	Oct. 29, 2020	Jun. 30, 2021	Dec. 31, 2020
Business Combination and Asset Acquisition [Abstract]
Cash acquired	$ 5,200
Business Acquisition [Line Items]
Goodwill		$ 19,155	$ 18,121
OptaSense Holdings Limited
Business Acquisition [Line Items]
Accounts receivable	4,534
Contract assets	1,513
Inventory	12,793
Other current assets	1,026
Property and equipment	1,247
Identifiable intangible assets	11,263
Goodwill	8,520
Right of use assets	2,151
Other long-term assets	22
Accounts payable and accrued expenses	(3,925)
Contract liabilities	(3,259)
Other current liabilities	(862)
Long-term operating lease liability	(1,335)
Total purchase consideration	$ 33,688

Business Acquisitions - Schedul

Business Acquisitions - Schedule of Preliminary Identifiable Intangible Assets Acquired (Details) - OptaSense Holdings Limited $ in Thousands	Oct. 29, 2020USD ($)
Business Acquisition [Line Items]
Identifiable intangible assets	$ 11,263
Developed technology
Business Acquisition [Line Items]
Acquired assets expected useful lives	10 years
Identifiable intangible assets	$ 7,379
Trade names and trademarks
Business Acquisition [Line Items]
Acquired assets expected useful lives	15 years
Identifiable intangible assets	$ 2,580
Backlog
Business Acquisition [Line Items]
Acquired assets expected useful lives	3 years
Identifiable intangible assets	$ 699
Customer relationships
Business Acquisition [Line Items]
Acquired assets expected useful lives	5 years
Identifiable intangible assets	$ 605

Business Acquisitions - Unaudit

Business Acquisitions - Unaudited Pro Forma Financial Information (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2020
Business Combination and Asset Acquisition [Abstract]
Revenue	$ 22,847	$ 47,713
Income from continuing operations	$ (1,507)	$ (177)

Intangible assets, net - Summar

Intangible assets, net - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 30,131	$ 29,746
Accumulated amortization	(11,244)	(9,637)
Total	18,887	20,109
Patent costs
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 5,797	5,702
Patent costs | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated Life	1 year
Patent costs | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated Life	18 years
Developed technology
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 17,608	17,344
Developed technology | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated Life	5 years
Developed technology | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated Life	10 years
In-process research & development
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 1,580	1,580
Customer base
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 1,307	1,302
Customer base | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated Life	5 years
Customer base | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated Life	7 years
Trade names
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 3,138	3,122
Trade names | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated Life	3 years
Trade names | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated Life	15 years
Backlog
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 701	$ 696
Estimated Life	3 years

Intangible assets, net - Additi

Intangible assets, net - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense	$ 0.8	$ 1.6

Intangible assets, net - Estima

Intangible assets, net - Estimated Aggregate Amortization (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
2021 - remaining 6 months	$ 1,695
2022	2,924
2023	2,827
2024	2,416
2025	2,082
2026 & beyond	6,943
Total	$ 18,887	$ 20,109

Goodwill (Details)

Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 19,155	$ 18,121
Goodwill adjustment	900
Foreign currency translation	$ 200

Inventory (Details)

Inventory (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Inventory Disclosure [Abstract]
Finished goods	$ 12,894	$ 11,547
Work-in-process	1,217	1,425
Raw materials	11,468	10,625
Total inventory	$ 25,579	$ 23,597

Accrued Liabilities (Details)

Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Payables and Accruals [Abstract]
Accrued compensation	$ 8,235	$ 9,103
Contingent consideration	225	225
Accrued professional fees	1,170	825
Accrued income tax	452	281
Accrued interest	21	42
Accrued royalties	454	456
Accrued liabilities - other	614	1,227
Total accrued liabilities	$ 11,171	$ 12,159

Debt - Additional Information (

Debt - Additional Information (Details) - PNC Bank Facility $ in Millions	Dec. 01, 2020USD ($)payment	Jun. 30, 2021
Term Loan
Debt Instrument [Line Items]
Number of quarterly payments | payment	12
Term Loan | Loan Agreement
Debt Instrument [Line Items]
Debt, face amount	$ 12.5
Revolving Loan
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage	0.20%
Termination notice	3 days
Revolving Loan | Loan Agreement
Debt Instrument [Line Items]
Line of credit facility	$ 15
Proceeds from Lines of Credit	7.6
Letter of Credit | Loan Agreement
Debt Instrument [Line Items]
Debt, face amount	$ 3
London Interbank Offered Rate (LIBOR) | Term Loan | Minimum
Debt Instrument [Line Items]
Variable basis rate	1.75%	1.75%
London Interbank Offered Rate (LIBOR) | Term Loan | Maximum
Debt Instrument [Line Items]
Variable basis rate	2.25%	2.25%
London Interbank Offered Rate (LIBOR) | Revolving Loan | Minimum
Debt Instrument [Line Items]
Variable basis rate	1.75%
London Interbank Offered Rate (LIBOR) | Revolving Loan | Maximum
Debt Instrument [Line Items]
Variable basis rate	2.25%

Debt - Long Term Debt (Details)

Debt - Long Term Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Total	$ 17,912	$ 19,984
Less: Current portion of long-term debt obligations	(4,167)	(4,167)
Long-term debt obligations	13,745	15,817
Term Loan
Debt Instrument [Line Items]
Total	10,362	12,434
Net of debt issuance costs	$ 55	$ 66
Debt instrument, stated percentage	2.48%	2.48%
Revolving Loan
Debt Instrument [Line Items]
Total	$ 7,550	$ 7,550
Debt instrument, stated percentage	2.48%	2.48%

Debt - Maturities (Details)

Debt - Maturities (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Debt Disclosure [Abstract]
2021 - remaining 6 months	$ 2,083
2022	4,167
2023	11,662
Total	$ 17,912	$ 19,984

Debt - Summary of Interest Expe

Debt - Summary of Interest Expense, Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Debt Instrument [Line Items]
Amortization of debt issuance costs	$ 11	$ 0	$ 22	$ 0
Other interest expense	1	1	27	1
Interest income	(1)		(1)
Total interest expense, net	122	1	265	1
Term Loan
Debt Instrument [Line Items]
Interest expense	66	0	142	0
Revolving Loan
Debt Instrument [Line Items]
Interest expense	$ 45	$ 0	$ 75	$ 0

Leases - Additional Information

Leases - Additional Information (Details)	6 Months Ended
	Jun. 30, 2021
Office equipment
Lessee, Lease, Description [Line Items]
Useful life	5 years
Minimum
Lessee, Lease, Description [Line Items]
Operating leases contract terms	1 year
Finance leases contract terms	1 year
Maximum
Lessee, Lease, Description [Line Items]
Operating leases contract terms	10 years
Finance leases contract terms	3 years

Leases - Rent Expense (Details)

Leases - Rent Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Leases [Abstract]
Operating lease costs	$ 741	$ 367	$ 1,450	$ 779
Variable rent costs	(28)	25	(57)	(14)
Total rent expense	$ 713	$ 392	$ 1,393	$ 765

Leases - Future Operating and F

Leases - Future Operating and Finance Lease Payments (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Operating Leases
2021 - remaining 6 months	$ 1,561
2022	2,817
2023	2,402
2024	1,902
2025	1,230
2026 and beyond	3,883
Total future minimum lease payments	13,795
Less: interest	2,255
Total lease liabilities	11,540
Current lease liability	2,314	$ 2,223
Long-term lease liability	9,226	10,248
Total lease liabilities	11,540
Finance Leases
2021 - remaining 6 months	26
2022	53
2023	53
2024	52
2025	48
2026 and beyond	0
Total future minimum lease payments	232
Less: interest	12
Total lease liabilities	220
Current portion of finance lease liability	48	48
Long-term portion of operating lease liability	172	$ 196
Total lease liabilities	$ 220

Leases - Other Lease Informatio

Leases - Other Lease Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Finance lease cost:
Amortization of right-of-use assets	$ 13	$ 14	$ 27	$ 27
Interest on lease liabilities	(1)	(1)	(3)	(1)
Total finance lease cost	12	13	24	26
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	741	367	1,450	744
Finance cash flows from finance leases	12	13	24	26
Right-of-use assets obtained in exchange for new operating lease liabilities	0	5,531	0	5,531
Right-of-use assets obtained in exchange for new finance lease liabilities	$ 0	$ 0	$ 0	$ 0
Weighted-average remaining lease term (years) - operating leases	6 years 1 month 6 days	8 years 3 months 18 days	6 years 1 month 6 days	3 years 8 months 12 days
Weighted-average remaining lease term (years) - finance leases	4 years 4 months 24 days	1 year 10 months 24 days	4 years 4 months 24 days	1 year 10 months 24 days
Weighted-average discount rate - operating leases	6.00%	6.00%	6.00%	6.00%
Weighted-average discount rate - finance leases	2.00%	7.00%	2.00%	7.00%

Capital Stock and Share-Based_3

Capital Stock and Share-Based Compensation - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)			80,735
Granted (in dollars per share)			$ 5.24
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 300,000		$ 500,000
Stock-based compensation expense not yet recognized	1,800,000		$ 1,800,000
Weighted average remaining service period			1 year 10 months 24 days
Restricted stock units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	300,000		$ 600,000
Stock-based compensation expense not yet recognized	$ 2,300,000		$ 2,300,000
Weighted average remaining service period			2 years 1 month 6 days
RSUs granted (in shares)	55,000		134,250
RSUs granted (in dollars per share)	$ 11.29		$ 11.35
Restricted stock units (RSUs) | Non-Employee Director Deferred Compensation Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs granted (in shares)	4,259		8,917
RSUs granted (in dollars per share)	$ 10.83		$ 10.09
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 100,000	$ 0	$ 200,000

Capital Stock and Share-Based_4

Capital Stock and Share-Based Compensation - Fair Values of Stock Options (Details) - Stock Options	6 Months Ended
	Jun. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free rate	0.98%
Expected volatility	55.22%
Expected term (in years)	7 years

Revenue Recognition - Schedule

Revenue Recognition - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation of Revenue [Line Items]
Total revenues	$ 27,937	$ 18,576	$ 54,236	$ 35,717
Technology development
Disaggregation of Revenue [Line Items]
Total revenues	7,493	6,816	14,625	13,630
Test, measurement and sensing systems
Disaggregation of Revenue [Line Items]
Total revenues	19,485	11,275	38,003	21,036
Other
Disaggregation of Revenue [Line Items]
Total revenues	959	485	1,608	1,051
Goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenues	18,605	11,629	35,755	21,871
Goods/services transferred over time
Disaggregation of Revenue [Line Items]
Total revenues	9,332	6,947	18,481	13,846
Fixed-price contracts
Disaggregation of Revenue [Line Items]
Total revenues	24,056	15,123	48,334	29,217
Cost-type contracts
Disaggregation of Revenue [Line Items]
Total revenues	3,881	3,453	5,902	6,500
Sales to the U.S. government
Disaggregation of Revenue [Line Items]
Total revenues	7,968	6,828	15,308	13,632
U.S. direct commercial sales and other
Disaggregation of Revenue [Line Items]
Total revenues	9,417	5,856	17,920	10,491
Foreign commercial sales & other
Disaggregation of Revenue [Line Items]
Total revenues	10,552	5,892	21,008	11,594
United States
Disaggregation of Revenue [Line Items]
Total revenues	17,386	12,684	33,228	24,124
Asia
Disaggregation of Revenue [Line Items]
Total revenues	3,598	3,568	7,270	7,324
Europe
Disaggregation of Revenue [Line Items]
Total revenues	4,575	1,854	8,579	3,567
Canada, Central and South America
Disaggregation of Revenue [Line Items]
Total revenues	2,378	258	5,159	463
All Others
Disaggregation of Revenue [Line Items]
Total revenues	0	212	0	239
Lightwave
Disaggregation of Revenue [Line Items]
Total revenues	21,965	12,933	42,962	24,487
Lightwave | Technology development
Disaggregation of Revenue [Line Items]
Total revenues	2,027	1,527	4,167	3,235
Lightwave | Test, measurement and sensing systems
Disaggregation of Revenue [Line Items]
Total revenues	19,485	11,275	38,003	21,036
Lightwave | Other
Disaggregation of Revenue [Line Items]
Total revenues	453	131	792	216
Lightwave | Goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenues	18,099	11,275	34,939	21,036
Lightwave | Goods/services transferred over time
Disaggregation of Revenue [Line Items]
Total revenues	3,866	1,658	8,023	3,451
Lightwave | Fixed-price contracts
Disaggregation of Revenue [Line Items]
Total revenues	20,732	12,160	41,778	22,950
Lightwave | Cost-type contracts
Disaggregation of Revenue [Line Items]
Total revenues	1,233	773	1,184	1,537
Lightwave | Sales to the U.S. government
Disaggregation of Revenue [Line Items]
Total revenues	2,502	1,727	4,916	3,520
Lightwave | U.S. direct commercial sales and other
Disaggregation of Revenue [Line Items]
Total revenues	9,033	5,314	17,199	9,373
Lightwave | Foreign commercial sales & other
Disaggregation of Revenue [Line Items]
Total revenues	10,430	5,892	20,847	11,594
Lightwave | United States
Disaggregation of Revenue [Line Items]
Total revenues	11,536	7,041	22,115	12,894
Lightwave | Asia
Disaggregation of Revenue [Line Items]
Total revenues	3,596	3,568	7,268	7,324
Lightwave | Europe
Disaggregation of Revenue [Line Items]
Total revenues	4,509	1,854	8,486	3,567
Lightwave | Canada, Central and South America
Disaggregation of Revenue [Line Items]
Total revenues	2,324	258	5,093	463
Lightwave | All Others
Disaggregation of Revenue [Line Items]
Total revenues	0	212	0	239
Luna Labs
Disaggregation of Revenue [Line Items]
Total revenues	5,972	5,643	11,274	11,230
Luna Labs | Technology development
Disaggregation of Revenue [Line Items]
Total revenues	5,466	5,289	10,458	10,395
Luna Labs | Test, measurement and sensing systems
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0	0
Luna Labs | Other
Disaggregation of Revenue [Line Items]
Total revenues	506	354	816	835
Luna Labs | Goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenues	506	354	816	835
Luna Labs | Goods/services transferred over time
Disaggregation of Revenue [Line Items]
Total revenues	5,466	5,289	10,458	10,395
Luna Labs | Fixed-price contracts
Disaggregation of Revenue [Line Items]
Total revenues	3,324	2,963	6,556	6,267
Luna Labs | Cost-type contracts
Disaggregation of Revenue [Line Items]
Total revenues	2,648	2,680	4,718	4,963
Luna Labs | Sales to the U.S. government
Disaggregation of Revenue [Line Items]
Total revenues	5,466	5,101	10,392	10,112
Luna Labs | U.S. direct commercial sales and other
Disaggregation of Revenue [Line Items]
Total revenues	384	542	721	1,118
Luna Labs | Foreign commercial sales & other
Disaggregation of Revenue [Line Items]
Total revenues	122	0	161	0
Luna Labs | United States
Disaggregation of Revenue [Line Items]
Total revenues	5,850	5,643	11,113	11,230
Luna Labs | Asia
Disaggregation of Revenue [Line Items]
Total revenues	2	0	2	0
Luna Labs | Europe
Disaggregation of Revenue [Line Items]
Total revenues	66	0	93	0
Luna Labs | Canada, Central and South America
Disaggregation of Revenue [Line Items]
Total revenues	54	0	66	0
Luna Labs | All Others
Disaggregation of Revenue [Line Items]
Total revenues	$ 0	$ 0	$ 0	$ 0

Revenue Recognition - Contract

Revenue Recognition - Contract Balances (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Contract assets	$ 6,857	$ 7,517
Contract liabilities	6,425	7,095
Net contract assets	$ 432	$ 422

Revenue Recognition - Performan

Revenue Recognition - Performance Obligation Amount (Details) $ in Millions	Jun. 30, 2021USD ($)
Lightwave
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 36.9
Lightwave | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, percentage	62.00%
Remaining performance obligation, period	6 months
Lightwave | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, percentage	32.00%
Remaining performance obligation, period	1 year
Luna Labs
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 25.6
Luna Labs | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, percentage	42.00%
Remaining performance obligation, period	6 months
Luna Labs | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, percentage	47.00%
Remaining performance obligation, period	1 year

Reportable Segments - Revenues

Reportable Segments - Revenues and Operating Income (Loss) for Reportable Segments Not Including Discontinued Operations (Details) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2021USD ($)	Jun. 30, 2020USD ($)	Mar. 31, 2020segment	Jun. 30, 2021USD ($)segment	Jun. 30, 2020USD ($)	Dec. 31, 2020USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment			2	2
Number of operating segments | segment				2
Revenues:
Total revenues	$ 27,937	$ 18,576		$ 54,236	$ 35,717
Total operating income (loss)	(1,002)	1,810		(1,796)	2,200
Amortization expense	800			1,600
Total segment assets:
Total assets	129,327			129,327		$ 131,002
Property plant and equipment, and intangible assets	3,183			3,183		3,308
Lightwave
Revenues:
Total revenues	21,965	12,933		42,962	24,487
Total operating income (loss)	(887)	642		(1,197)	1,145
Depreciation	328	217		682	417
Amortization expense	766	408		1,592	813
Total segment assets:
Total assets	114,746			114,746		110,446
Property plant and equipment, and intangible assets	40,782			40,782		40,995
Luna Labs
Revenues:
Total revenues	5,972	5,643		11,274	11,230
Total operating income (loss)	(115)	1,168		(599)	1,055
Depreciation	28	27		62	74
Amortization expense	7	$ 32		24	$ 59
Total segment assets:
Total assets	14,581			14,581		20,556
Property plant and equipment, and intangible assets	$ 443			$ 443		$ 543

Reportable Segments - Additiona

Reportable Segments - Additional Information (Details) - Revenues	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Government contracts concentration risk | U.S. government
Segment Reporting Information [Line Items]
Percentage of total consolidated revenues by customer	29.00%	37.00%	28.00%	38.00%
Geographic concentration risk | Outside of the United States
Segment Reporting Information [Line Items]
Percentage of total consolidated revenues by customer	38.00%	32.00%	39.00%	32.00%
Geographic concentration risk | China
Segment Reporting Information [Line Items]
Percentage of total consolidated revenues by customer		11.00%		11.00%

Income Taxes (Details)

Income Taxes (Details)	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Income Tax Disclosure [Abstract]
Effective income tax rate	73.38%	2553.00%

Commitments and Contingencies (

Commitments and Contingencies (Details) - USD ($) $ in Millions	1 Months Ended	6 Months Ended	12 Months Ended
	Mar. 31, 2020	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019	Jun. 30, 2021	Sep. 30, 2020	Aug. 31, 2017
Tunable lasers
Loss Contingencies [Line Items]
Non-cancelable purchase order commitment			$ 1.6			$ 1.5
Non-cancelable purchase order delivery period			12 months
Non-cancelable purchase order commitment remaining					$ 1.4
High speed optical receivers business | Disposed of by Sale
Loss Contingencies [Line Items]
Escrow deposits related to indemnity claims				$ 2.5
Amount of the escrow balance received	$ 0.6			$ 1.5
Loss on sale of discontinued operations		$ 1.4
High speed optical receivers business | Disposed of by Sale | Macom
Loss Contingencies [Line Items]
Amount of the escrow balance received	$ 1.9
Macom | High speed optical receivers business | Disposed of by Sale
Loss Contingencies [Line Items]
Escrow deposits related to indemnity claims							$ 4

Uncategorized Items - luna-2021

Label	Element	Value
Gain (Loss) on Disposition of Property Plant Equipment	us-gaap_GainLossOnSaleOfPropertyPlantEquipment	$ 0
Gain (Loss) on Disposition of Property Plant Equipment	us-gaap_GainLossOnSaleOfPropertyPlantEquipment	(4,000)
Proceeds from Sale of Property, Plant, and Equipment	us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment	0
Proceeds from Sale of Property, Plant, and Equipment	us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment	$ 1,000