Luna Innovations (LUNA) 425 9 Feb 15 Business combination disclosure Financial data

Document_and_Entity_Informatio

Document and Entity Information	12 Months Ended
	Dec. 31, 2013
Document And Entity Information [Abstract]
Document Type	8-K
Amendment Flag	FALSE
Document Period End Date	31-Dec-13
Trading Symbol	LUNA
Entity Registrant Name	LUNA INNOVATIONS INC
Entity Central Index Key	1239819

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2013	Dec. 31, 2012
Current assets;
Cash and cash equivalents	$7,778,541	$6,340,461
Accounts receivable, net	5,408,281	7,059,635
Inventory, net	3,346,177	3,336,916
Prepaid expenses	708,974	667,773
Other current assets	70,208	35,629
Total current assets	17,312,181	17,440,414
Property and equipment, net	2,060,709	2,426,638
Intangible assets, net	288,475	437,839
Other assets	42,710	152,877
Total assets	19,704,075	20,457,768
Current Liabilities;
Current portion of long term debt obligation	1,500,000	1,500,000
Current portion of capital lease obligation	66,617	54,091
Accounts payable	1,401,764	1,797,571
Accrued compensation	2,205,612	1,648,064
Accrued liabilities	1,219,650	863,214
Accrued liabilities - other	121,323	235,897
Deferred credits	691,424	832,822
Total current liabilities	7,206,390	6,931,659
Long-term debt obligation	625,000	2,125,000
Long-term capital lease obligation	110,307	128,917
Total liabilities	7,941,697	9,185,576
Commitments and contingencies
Stockholders' equity;
Preferred stock, value	1,322	1,322
Common stock, value	14,842	14,245
Additional paid-in capital	62,756,571	61,361,505
Accumulated deficit	-51,010,357	-50,104,880
Total stockholders' equity	11,762,378	11,272,192
Total liabilities and stockholders' equity	$19,704,075	$20,457,768

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$0.00	$0.00
Preferred stock, shares authorized	1,321,514	1,321,514
Preferred stock, shares issued	1,321,514	1,321,514
Preferred stock, shares outstanding	1,321,514	1,321,514
Common stock, par value (in dollars per share)	$0.00	$0.00
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	14,527,335	14,009,280
Common stock, shares outstanding	14,527,335	14,009,280

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Revenues:
Technology development revenues	$11,421,868	$15,126,834
Products and licensing revenues	6,911,707	8,338,967
Total revenues	18,333,575	23,465,801
Cost of revenues:
Technology development costs	8,882,071	10,749,335
Products and licensing costs	3,402,846	3,824,661
Total cost of revenues	12,284,917	14,573,996
Gross profit	6,048,658	8,891,805
Operating expense:
Selling, general & administrative	10,970,775	10,249,444
Research, development, and engineering	3,113,193	2,772,438
Total operating expense	14,083,968	13,021,882
Operating loss	-8,035,310	-4,130,077
Other income (expense):
Other income, net	347,026	108,061
Interest expense, net	-207,538	-312,372
Total other (expense) income	139,488	-204,311
Loss from continuing operations before income taxes	-7,895,822	-4,334,388
Income tax benefit	-2,387,422	-1,106,564
Loss from continuing operations, net	-5,508,400	-3,227,824
Income from discontinued operations, net of income taxes ($1.0 million and $2.4 million, respectively)	4,705,250	1,843,439
Net loss	-803,150	-1,384,385
Preferred stock dividend	102,327	119,754
Net loss attributable to common stockholders	($905,477)	($1,504,139)
Net loss per share from continuing operations:
Basic (in dollars per share)	($0.38)	($0.23)
Diluted (in dollars per share)	($0.38)	($0.23)
Net income per share from discontinued operations:
Basic (in dollars per share)	$0.33	$0.13
Diluted (in dollars per share)	$0.33	$0.13
Net loss per share attributable to common stockholders:
Basic (in dollars per share)	($0.06)	($0.11)
Diluted (in dollars per share)	($0.06)	($0.11)
Weighted average shares:
Basic and Diluted	14,336,135	13,930,267

Consolidated_Statements_of_Ope1

Consolidated Statements of Operations (Parenthetical) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Income from discontinued operations, income taxes	$2.40	$1.10

Consolidated_Statements_Of_Cha

Consolidated Statements Of Changes In Stockholders' Equity (Deficit) (USD $)		Total	Preferred stock	Common Stock	Additional Paid in Capital	Accumulated Deficit
Beginning Balance at Dec. 31, 2011		$10,704,066	$1,322	$13,969	$59,289,516	($48,600,741)
Begging balance (in shares) at Dec. 31, 2011			1,321,514	13,812,490
Exercise of stock options and warrants (in shares)				182,702
Exercise of stock options and warrants		69,978		183	69,795
Stock-based compensation		1,862,533			1,862,533
Stock dividends	[1]			79	119,675	-119,754
Issuance of Common Stock, Other (in shares)	[2]			14,088
Issuance of Common Stock, Other	[2]	20,000		14	19,986
Net (loss)/income		-1,384,385				-1,384,385
Ending Balance at Dec. 31, 2012		11,272,192	1,322	14,245	61,361,505	-50,104,880
Ending balance (in shares) at Dec. 31, 2012			1,321,514	14,009,280
Exercise of stock options and warrants (in shares)				169,277
Exercise of stock options and warrants		111,957		168	111,789
Stock-based compensation		1,166,379		338	1,166,041
Stock-based compensation (in shares)				337,500
Stock dividends	[1]			80	102,247	-102,327
Issuance of Common Stock, Other (in shares)	[2]			11,278
Issuance of Common Stock, Other	[2]	15,000		11	14,989
Net (loss)/income		-803,150				-803,150
Ending Balance at Dec. 31, 2013		$11,762,378	$1,322	$14,842	$62,756,571	($51,010,357)
Ending balance (in shares) at Dec. 31, 2013			1,321,514	14,527,335
[1]	The stock dividends payable in connection with the Series A Convertible Preferred Stock are issuable upon the request of Carilion.
[2]	Fees paid to our board of directors by issuance of our common stock.

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Cash flows used in operating activities:
Net loss	($803,150)	($1,384,385)
Adjustments to reconcile net loss to net cash provided/(used in) by operating activities:
Depreciation and amortization	935,477	1,092,027
Stock-based compensation	1,181,379	1,882,533
Gain on sale of discontinued operations, net of income taxes	-3,391,451
Allowance for doubtful accounts or bad debt expense	134,811
Tax benefit from utilization of loss from current year operations	-1,507,791
Changes in operating assets and liabilities:
Accounts receivable	1,533,827	-1,101,549
Inventory	-9,261	-10,482
Other assets	-79,180	478,919
Accounts payable and accrued expenses	396,352	-724,050
Deferred credits	-178,305	-629,781
Net cash used in operating activities	-1,787,292	-396,768
Cash flows (used in)/provided by investing activities:
Acquisition of property and equipment	-186,956	-371,390
Intangible property costs	-253,451	-224,537
Proceeds from sale of discontinued operations, net of fees	5,110,855
Net cash (used in)/provided by investing activities	4,670,448	-595,927
Cash flows provided by/(used in) financing activities:
Payments on debt obligations	-1,500,000	-1,625,000
Payments on capital lease obligation	-57,033	-50,949
Proceeds from the exercise of options and warrants	111,957	69,978
Net cash used in financing activities	-1,445,076	-1,605,971
Net change in cash	1,438,080	-2,598,666
Cash and cash equivalents-beginning of period	6,340,461	8,939,127
Cash and cash equivalents-end of period	7,778,541	6,340,461
Supplemental disclosure of cash flow information
Cash paid for interest	178,646	297,875
Dividend on preferred stock	102,327	119,754
Cash paid for income taxes	$14,010	$21,618

Consolidated_Statements_of_Cas1

Consolidated Statements of Cash Flows (Parenthetical)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Statement of Cash Flows [Abstract]
Dividend on preferred stock, shares of common stock issuable	79,292	79,292

Organization_and_Summary_of_Si

Organization and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Summary of Significant Accounting Policies	1. Organization and Summary of Significant Accounting Policies
	Luna Innovations Incorporated (“We” 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 develop, manufacture and market fiber optic sensing and test & measurement products focused on bringing new and innovative technology solutions to measure, monitor, protect and improve critical processes in the aerospace, automotive, energy, composite, telecommunications and defense industries. Our business model is designed to accelerate the process of bringing new and innovative products to market. We use our in-house technical expertise to perform applied research services on government-funded projects across a range of technologies and also for corporate customers in the fiber optic sensing area. We are organized into two business segments: our Technology Development segment and our Products and Licensing segment. Our Technology Development segment performs applied research principally on government-funded projects. Most of the government funding in our Technology Development segment is derived from the U.S. Government’s Small Business Innovation Research, or SBIR, program coordinated by the U.S. Small Business Administration, or SBA. Our Products and Licensing segment focuses on fiber optic test and measurement, sensing, and instrumentation products.
	We have a history of net losses and negative cash flow from operations. We have historically managed our liquidity through cost reduction initiatives, debt financings and capital markets transactions.
	Although there can be no guarantees, we believe that our current cash balance, including the proceeds from the sale of our medical shape sensing business to Intuitive in January 2014 described in Note 15, our cash flow from operations, and the funds available to us under the Credit Facility described in Note 3 below, provide adequate liquidity for us to meet our working capital needs through 2014.
	Discontinued Operations
	The Company’s Board of Directors and management determined that it would be in the best interest of the Company’s stockholders to sell the Secure Computing and Communication (“SCC”) group, which was part of the Technology Development segment, and medical shape sensing shape sensing business, which was part of the Product and Licensing Segment. On March 1, 2013, we completed the sale of our SCC for approximately $6.1 million. On January 21, 2014 we sold our assets associated with the medical shape sensing business for approximately $30.0 million.
	As a result, the Company has classified the operating results, net of taxes, of the aforementioned businesses as discontinued operations. The accompanying consolidated balance sheets of the Company as of December 31, 2012 and 2013, and the related consolidated statements of operations and cash flows for each of the two years in the period ended December 31, 2013, and the related notes to the consolidated financial statements have been retrospectively revised to reflect the classification of discontinued operations for these businesses. See Note 15, Discontinued Operations for further information. Unless otherwise noted, the following notes refer to the Company’s continuing operations.
	Consolidation Policy
	Our consolidated financial statements are prepared in accordance with accounting principles generally accepted in the United States, or GAAP and include the accounts of the Company and its wholly owned subsidiaries. We eliminate from our financial results all significant intercompany transactions. We do not have any investments in entities we believe are variable interest entities for which the Company is the primary beneficiary.
	Preferred Stock Issued to Carilion Clinic
	In January 2010, we entered into a transaction with Carilion Clinic (“Carilion”), in which Carilion agreed to exchange all of its Senior Convertible Promissory Notes in the principal amount of $5.0 million plus all accrued but unpaid interest, totaling $1.2 million, for (i) 1,321,514 shares of our newly designated Series A Convertible Preferred Stock and (ii) an additional warrant to purchase 356,000 shares of our common stock at an exercise price of $2.50 per share. This warrant is exercisable until December 31, 2020. We also agreed to reduce the exercise price of Carilion’s prior common stock warrant from $7.98 to $2.50 per share and to extend its expiration date to December 31, 2020. The Series A Convertible Preferred Stock carries a dividend of 6% payable in shares of common stock and maintains a liquidation preference up to $6.2 million. As of December 31, 2013, a cumulative total of 314,525 shares of common stock were issuable to Carilion, on their demand, as dividends and have been recorded in the statement of stockholders’ equity. Each share of Series A Convertible Preferred Stock may be converted into one share of our common stock at the option of the holder. We recorded the fair value of the Series A Convertible Preferred Stock, determined based upon the conversion value immediately prior to the exchange, the fair value of the new warrant issued, determined using the Black-Scholes valuation model, and the incremental fair value of the prior warrant due to the re-pricing and extension of expiration to stockholders’ equity.
	Use of Estimates
	The preparation of our consolidated financial statements in accordance with GAAP requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses and the disclosure of contingent assets and liabilities in our consolidated financial statements and accompanying notes.
	Although these estimates are based on our knowledge of current events and actions we may undertake in the future, actual results may differ from such estimates and assumptions.
	Technology Development Revenues
	We perform research and development for U.S. government agencies, educational institutions and commercial organizations. We recognize revenues under research contracts when a contract has been executed, the contract price is fixed and determinable, delivery of services or products has occurred and collection of the contract price is considered reasonably assured. Revenue is earned under cost reimbursable, time and materials and fixed price contracts. Direct contract costs are expensed as incurred.
	Under cost reimbursable contracts, we are reimbursed for costs that are determined to be reasonable, allowable and allocable to the contract and are paid a fixed fee representing the profit negotiated between us and the contracting agency. Revenue from cost reimbursable contracts is recognized as costs are incurred plus a portion of the fee earned. Revenue from time and materials contracts is recognized based on direct labor hours expended at contract billing rates plus other billable direct costs.
	Revenue from fixed price research contracts that involve the delivery of services and a prototype model is recognized under the percentage of completion method. Fixed price arrangements that involve the delivery of research reports are recognized under the proportional performance method based upon the ratio of costs incurred to achieve contract milestones to total estimated cost as this method more accurately measures performance under these arrangements. Losses on contracts, if any, are recognized in the period in which they become known.
	Intellectual Property License Revenues
	Amounts received from third parties for licenses to our intellectual property are recognized when earned under the terms of the agreements. Revenues are recognized upon transfer of the license unless we have continuing obligations for which fair value cannot be established, in which case the revenues are recognized over the period of the obligation. If there are extended payment terms, license fee revenues are recognized as these payments become due and collection is reasonably assured. We consider all arrangements with payment terms extending beyond 12 months not to be fixed and determinable.
	Certain of our license arrangements have also required us to enter into research and development agreements. Accordingly, we allocate our arrangement fees to the various elements based upon objective reliable evidence of fair value, if available. For those arrangements in which evidence of fair value is not available, we defer revenues from any up-front payments and recognize them over the service period in the arrangement. Certain of these arrangements also include the payment of performance bonuses based upon the achievement of specific milestones. Generally, there are no assurances at the onset of these arrangements that the milestones will be achieved. As such, fees related to such milestones are excluded from the initial allocation of the arrangement fee and are recognized upon achievement of the milestone provided that all other revenue recognition criteria are met.
	Product Sales Revenues
	Revenues from product sales are generated by the sale of commercial products and services under various sales programs to the end user and through distribution channels. We sell fiber optic sensing systems to end users for use in numerous fiber optic based measurement applications. Revenues are recorded net of applicable sales taxes collected from customers and payable to state or local governmental entities.
	We recognize revenue relating to our products when persuasive evidence of an arrangement exists, delivery has occurred, the selling price is fixed or determinable and collectability of the resulting receivable is reasonably assured.
	For multi-element arrangements that include tangible products that contain software that is essential to the tangible product’s functionality, we allocate revenue to all deliverables based on their relative selling prices. Other deliverables include extended warranty, training and various add-on products. In such circumstances, we use a hierarchy to determine the selling price to be used for allocating revenue to deliverables: (i) vendor-specific objective evidence of fair value or VSOE, (ii) third-party evidence of selling price or TPE, and (iii) best estimate of the selling price or ESP. VSOE generally exists only when we sell the deliverable separately and is the price actually charged by us for that deliverable. ESPs reflect our best estimates of what the selling prices of elements would be if they were sold regularly on a stand-alone basis.
	Our process for determining our ESP for deliverables without VSOE or TPE considers multiple factors that may vary depending upon the unique facts and circumstances related to each deliverable. Key factors considered in developing the ESPs include prices charged by us for similar offerings, our historical pricing practices, the nature of the deliverables, and the relative ESP of all of the deliverables as compared to the total selling price of the product. We may also consider, when appropriate, the impact of other products and services on selling price assumptions when developing and reviewing our ESPs.
	Revenues from product sales that require no ongoing obligations are recognized as revenues when shipped to the customer, title has passed and collection is reasonably assured. In transactions in which a right-of-return exists, revenues are deferred until acceptance has occurred and the period for the right-of-return has lapsed.
	Allowance for Uncollectible Receivables
	Accounts receivable are recorded at their face amount, less an allowance for doubtful accounts. We review the status of our uncollected receivables on a regular basis. In determining the need for an allowance for uncollectible receivables, we consider our customers’ financial stability, past payment history and other factors that bear on the ultimate collection of such amounts. The allowance was $0 at December 31, 2012 and approximately $134,811 at December 31, 2013.
	Cash Equivalents
	We consider all highly liquid investments purchased with maturities of three months or less to be cash equivalents. To date, we have not incurred losses related to cash and cash equivalents. The Company regularly maintains cash balances with financial institutions which exceed Federal Deposit Insurance Corporation (“FDIC”) insurance limits. At December 31, 2013 and December 31, 2012, the Company had approximately $7.5 million and $6.1 million, respectively, in excess of FDIC insured limits.
	Fair Value Measurements
	The Company’s financial assets and liabilities are measured at fair value, which is defined as the price that would be received to sell an asset, or paid to transfer a liability, in an orderly transaction between market participants. Valuation techniques are based on observable or unobservable inputs. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect the Company’s market assumptions. These two types of inputs have created the following fair value hierarchy:
		•		Level 1—Quoted prices for identical instruments in active markets.
		•		Level 2—Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which 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 and accounts payable approximate fair value because of the short-term nature of these instruments. The carrying value of the promissory notes approximate fair value as the interest rate is comparable to the interest rate on our credit facility with Silicon Valley Bank, which we consider to be at market.
	Property and Equipment
	Property and equipment are stated at cost less accumulated depreciation. We record depreciation using the straight-line method over the following estimated useful lives:
	Equipment		3 – 7 years
	Furniture and fixtures		7 years
	Software		3 years
	Leasehold improvements		Lesser of lease term or life of improvements
	Intangible Assets
	Intangible assets consist of patents related to certain intellectual property that we have developed or acquired. We amortize our patents over their estimated useful life of five years, and analyze them whenever events or circumstances indicate that the carrying amount may not be recoverable to determine whether their carrying value has been impaired.
	Research, Development and Engineering
	Research, development and engineering expenses not related to contract performance are expensed as incurred. We expensed $2.8 million and $3.1 million of non-contract related research, development and engineering expenses for the years ended December 31, 2012 and 2013, respectively.
	Valuation of Long-Lived Assets
	We review our long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets is measured by comparing the carrying amount of an asset to future undiscounted net cash flows expected to be generated by the asset. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds their fair value. Assets to be disposed of by sale are reflected at the lower of their carrying amount or fair value less cost to sell.
	Inventory
	Inventory consists of finished goods, work in process and parts valued at the lower of cost (determined on the first-in, first-out basis) or market. We provide reserves for estimated obsolescence or unmarketable inventory equal to the difference between the carrying value of the inventory and the estimated market value based upon assumptions about future demand and market conditions.
	Net Loss per Share
	Basic per share data is computed by dividing net loss attributable to common stockholders by the weighted average number of shares outstanding during the period. Diluted per share data is computed by dividing net loss attributable to common stockholders 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 common shares 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 effect of 2.4 million and 2.3 million common stock equivalents (which include outstanding warrants and stock options) are not included for the years ended December 31, 2012 and 2013 respectively, as they are antidilutive to earnings per share due to the Company’s loss from continuing operations.
	Stock-Based Compensation
	We have a stock-based compensation plan, which is described further in Note 8. We recognize compensation expense based upon the fair value of the underlying equity award as of the date of grant. The Company has elected to use the Black-Scholes option pricing model to value any awards granted. We amortize stock-based compensation for such awards on a straight-line method over the requisite service period of the awards taking into account the effects of the employees’ expected exercise and post-vesting employment termination behavior.
	The Company recognizes expense for equity instruments issued to non-employees based upon the fair value of the equity instruments issued.
	The fair value of each option granted is estimated as of the grant date using the Black-Scholes option pricing model with the following assumptions:
			2012		2013
	Risk-free interest rate range		1.02% – 1.49%		1.27% – 2.34%
	Expected life of option-years		7.5		7.5
	Expected stock price volatility		108%		108%
	Executive turnover rates		—  %		—  %
Non-executive turnover rates		18.50%		14.70%
Expected dividend yield		—		—
The risk-free interest rate is based on U.S. Treasury interest rates, the terms of which are consistent with the expected life of the stock options. Expected volatility is based upon the average volatility of our common stock. The expected life and estimated post-employment termination behavior is based upon historical experience of homogeneous groups, executives and non-executes, within our company. We do not currently issue dividends nor do we expect to in the foreseeable future.
Advertising
We expense the cost of advertising as incurred. Historically such amounts have not been significant to our operations.
Income Taxes
We account for income taxes using the liability method. Deferred tax assets or liabilities are determined based on the difference between the financial statement and tax basis of assets and liabilities as measured by the enacted tax rates which will be in effect when the differences reverse. A valuation allowance against net deferred tax assets is provided unless we conclude it is more likely than not that the deferred tax assets will be realized.
We recognize tax benefits from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by taxing authorities.

Inventory

Inventory	12 Months Ended
	Dec. 31, 2013
Inventory Disclosure [Abstract]
Inventory	2. Inventory
	Inventory consists of finished goods, work-in-process and parts valued at the lower of cost (determined on the first-in, first-out basis) or market. We provide reserves for estimated obsolescence or unmarketable inventory equal to the difference between the cost of the inventory and the estimated market value based upon assumptions about future demand and market conditions.
	Components of inventory are as follows:
		December 31,		December 31,
		2012		2013
	Finished goods	$	195,578	$	719,574
	Work-in-process		252,227		361,754
	Parts		2,975,297		2,339,595
			3,423,102		3,420,923
	Less: Inventory reserves		86,186		74,746
	Total inventory, net	$	3,336,916	$	3,346,177

Debt

Debt	12 Months Ended
	Dec. 31, 2013
Debt Disclosure [Abstract]
Debt	3. Debt
	Silicon Valley Bank Facility
	We currently have a Loan and Security Agreement with Silicon Valley Bank (“SVB”) under which we have a term loan with an original borrowing amount of $6.0 million (the “Term Loan”). The Term Loan is to be repaid by us in 48 monthly installments, plus accrued interest payable monthly in arrears, and unless earlier terminated, matures on the earlier of either May 1, 2015 or an event of a default under the loan agreement. The term loan carries a floating annual interest rate equal to SVB’s prime rate then in effect plus 2%. We may repay amounts due under the Term Loan at any time with no penalties.
	In addition to the terms and conditions of the Term Loan, we also have a revolving credit facility (the “Line of Credit” and together with the Term Loan, the “Credit Facilities”) with a maximum borrowing capacity of $1.0 million. The interest rate on the Line of Credit is SVB’s prime rate plus 1.25%, payable monthly in arrears, and we are required to pay an unused Line of Credit fee of one-quarter of one percent (0.25%), payable monthly. We may terminate the Line of Credit for a termination fee of $10,000, which fee would not be payable in the event that the Line of Credit is replaced by another loan facility with SVB. The Line of Credit has a maturity date of May 18, 2014.
	Amounts due under the Credit Facilities are secured by substantially all of our assets, including intellectual property, personal property and bank accounts.
	On March 21, 2013, we entered into a Fourth Loan Modification Agreement with SVB that replaced the existing financial covenants with a single covenant that we maintain a minimum cash balance of $5.0 million with SVB. Effective on January 21, 2014, in connection with our sale of assets to Intuitive, this covenant was modified to reduce the required minimum cash balance to $3.5 million. The Credit Facilities also require us to observe a number of operational covenants, including protection and registration of intellectual property rights, and certain customary negative covenants. As of December 31, 2013, we were in compliance with all covenants under the Credit Facilities.
	In addition, the Credit Facilities contain customary events of default, including nonpayment of principal, interest or other amounts, violation of covenants, material adverse change, an event of default under any subordinated debt documents, incorrectness of representations and warranties in any material respect, bankruptcy, judgments in excess of a threshold amount, and violations of other agreements in excess of a threshold amount. If any event of default occurs SVB may declare due immediately all borrowings under the Credit Facilities and foreclose on the collateral. Furthermore, an event of default under the Credit Facilities would result in an increase in the interest rate on any amounts outstanding. As of December 31, 2013, there were no events of default on our Credit Facilities.
	The balance under the Term Loan at December 31, 2013 was $2.1 million of which $0.6 million was classified as long-term and $1.5 million was classified as short-term. No amounts were outstanding under the Line of Credit and the available credit capacity was $1.0 million at December 31, 2013. The effective rate of our Term Loan at December 31, 2013 was 6%.
	The following table presents a summary of debt outstanding as of December 31, 2012 and 2013:
		December 31,
		2012		2013
	Silicon Valley Bank Term Loan	$	3,625,000	$	2,125,000
	Less: current portion		1,500,000		1,500,000
	Total long-term debt	$	2,125,000	$	625,000
	Maturities on long-term debt are as follows:
	Year	Amount
	2014		1,500,000
	2015		625,000
	Total	$	2,125,000
	Costs associated with loans outstanding were as follows:
		Years Ended December 31,
		2012		2013
	Interest expense	$	286,529	$	189,151
	Amortization of transaction costs		25,843		18,387
	Total interest expense	$	312,372	$	207,538

Accounts_ReceivableTrade

Accounts Receivable-Trade	12 Months Ended
	Dec. 31, 2013
Receivables [Abstract]
Accounts Receivable-Trade	4. Accounts Receivable—Trade
	Accounts receivable consist of the following:
		December 31,
		2012		2013
	Billed	$	5,175,395	$	3,552,184
	Unbilled		1,873,376		1,755,439
	Other		10,864		235,469
		$	7,059,635	$	5,543,092
	Less: allowance for doubtful accounts		—		(134,811	)
		$	7,059,635	$	5,408,281
	Unbilled receivables result from contract retainages and revenues that have been earned in advance of billing and can be invoiced at contractually defined intervals, milestones, or at completion of the contract.
	Unbilled amounts are expected to be billed in future periods and are classified as current assets in accordance with industry practice.

Property_and_Equipment

Property and Equipment	12 Months Ended
	Dec. 31, 2013
Property, Plant and Equipment [Abstract]
Property and Equipment	5. Property and Equipment
	Property and equipment, net, consists of the following at:
		December 31,
		2012			2013
	Building	$	69,556		$	69,556
	Equipment		7,222,208			7,239,017
	Furniture and fixtures		622,944			562,485
	Software		1,185,290			1,092,484
	Leasehold improvements		3,196,590			3,168,377
			12,296,588			12,131,919
	Less—accumulated depreciation		(9,869,950	)		(10,071,210	)
		$	2,426,638		$	2,060,709
	Depreciation for the years ended December 31, 2012 and 2013 was approximately $0.8 million and $0.5 million, respectively.

Intangible_Assets

Intangible Assets	12 Months Ended
	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	6. Intangible Assets
	The following is a summary of intangible assets:
		December 31,
		2012			2013
	Patent costs	$	2,264,441		$	2,496,560
	Accumulated amortization		(1,826,602	)		(2,208,085	)
		$	437,839		$	288,475
	Amortization for the years ended December 31, 2012 and 2013 was approximately $0.3 million and $0.4 million, respectively. Estimated aggregate amortization, based on the net value of intangible assets at December 31, 2013, for each of the next five years is as follows:
	Year Ending December 31,
	2014		188,616
	2015		53,371
	2016		24,844
	2017		10,578
	2018		6,013
		$	283,422

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Income Taxes	7. Income Taxes
	Deferred tax assets and liabilities consist of the following components:
		2012						2013
		Current			Long-Term			Current			Long-Term
	Bad debt and inventory reserve	$	41,243		$	—		$	88,077		$	—
	Deferred revenue		—			—			—			59,673
	Depreciation and amortization		—			1,005,697			—			1,024,784
	Net operating loss carryforwards		—			11,358,044			—			10,896,286
	Research and development credits		—			386,161			—			386,161
	Accrued liabilities		731,831			—			836,011			—
	Deferred compensation		—			123,797			—			163,655
	Stock-based compensation		—			1,208,970			—			1,519,513
	AMT credit		—			28,555			—			42,711
	Total		773,074			14,111,224			924,088			14,092,783
	Valuation allowance		(773,074	)		(14,111,224	)		(924,088	)		(14,092,783	)
	Net deferred tax asset	$	—		$	—		$	—		$	—
	The reconciliation of expected income tax benefit (expense) to actual income tax expense benefit (expense) was as follows:
		2012			2013
	Statutory federal rate		34	%		34	%
	State tax net of federal benefit		3.73	%		3.96	%
	Change in valuation allowance		(4.16	)%		(16.88	)%
	Incentive stock options		(35.60	)%		(41.60	)%
	Provision to return adjustments		(1.80	)%		24.11	%
	Meals and entertainment		(0.74	)%		(1.33	)%
	Other Permanent differences		(0.60	)%		(4.37	)%
	Income tax (expense)		(5.17	)%		(2.11	)%
	The income tax expense consists of the following for:
		2012			2013
	Current:
	Federal	$	18,268		$	14,071
	State		3,149			—
	Deferred Federal		—			—
	Deferred State		—			—
	Income tax expense	$	21,417		$	14,071
	The realization of our deferred income tax assets is dependent upon sufficient taxable income in future periods. In assessing whether deferred tax assets may be realized, we consider whether it is more likely than not that some portion, or all, of the deferred tax asset will be realized. We consider scheduled reversals of deferred tax liabilities, projected future taxable income and tax planning strategies that we can implement in making our assessment. We have net operating loss carryforwards at December 31, 2013 of approximately $28.7 million expiring at varying dates through 2025. We have research and development tax credit carryforwards at December 31, 2013 of approximately $0.4 million, which expire at varying dates through 2024.
	We have undertaken a formal section 382 study and determined that we do not have a limitation on our net operating loss available to offset income.
	The U.S. federal statute of limitations remains open for the year 2005 and onward. We currently have no federal income tax returns under examination. U.S. state jurisdictions have statutes of limitation generally ranging from three to seven years. We currently have no state income or franchise tax returns under examination. We currently do not file tax returns in any foreign tax jurisdiction.
	We currently have no positions for which we expect that the amount of unrecognized tax benefit will increase or decrease significantly within twelve months of the reporting date. We have no tax interest or penalties reported in either our statement of operations or statement of financial position for any year reported herein. Management believes it is not more likely than not that the deferred tax assets at December 31, 2012 or December 31, 2013 will be realized, and therefore a valuation allowance was established against all such deferred tax assets.
	We are evaluating the potential impact of the final Treasury regulations released on September 13, 2013 concerning amounts paid to acquire, produce or improve tangible property and recovery of basis upon disposition. We are determining whether or not any changes in accounting method will be required and if they will result in a material impact to our financial statements. At this time, we do not anticipate there being a material impact.
	Windfall equity-based compensation deductions are tracked, but will not be recorded to the balance sheet until management determines it is more likely than not that such amounts will be utilized. As of December 31, 2013, the Company had approximately $165,000 of windfall stock compensation deductions. If and when realized, the tax benefit associated with these deductions will be credited to additional paid-in capital. These excess benefit deductions are included in the total federal net operating losses disclosed above.

Stockholders_Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2013
Equity [Abstract]
Stockholders' Equity	8. Stockholders’ Equity
	Series A Convertible Preferred Stock
	In January 2010, we entered into a transaction with Carilion, in which Carilion agreed to exchange all of its Senior Convertible Promissory Notes in the principal amount of $5.0 million plus all accrued but unpaid interest, totaling $1.2 million, for 1,321,514 shares of our newly designated Series A Convertible Preferred Stock. The Series A Convertible Preferred Stock is non-voting, carries a dividend of 6% payable in shares of common stock and maintains a liquidation preference up to $6.2 million. As of December 31, 2013, 314,525 shares of common stock were issuable to Carilion as dividends and have been recorded in the statement of stockholders’ equity. These dividends are issuable on demand. Each share of Series A Convertible Preferred Stock may be converted into one share of our common stock at the option of the holder. We recorded the fair value of the Series A Convertible Preferred Stock, determined based upon the conversion value immediately prior to the exchange, the fair value of the new warrant issued to Carilion (as described below), determined using the Black-Scholes valuation model, and the incremental fair value of the prior warrant due to the re-pricing (as described below) and extension of maturity to stockholders’ equity.
	Hansen Warrant
	In January 2010, we issued 1,247,330 shares of common stock to Hansen, representing 9.9% of our common stock then outstanding. In addition, we issued to Hansen a warrant entitling Hansen to purchase a number of shares of our common stock as necessary for Hansen to maintain a 9.9% ownership interest in our common stock, at an exercise price of $0.01 per share. During 2012, Hansen did not exercise any of its outstanding warrants. During 2013, Hansen exercised warrants acquiring an additional 32,180 shares. The warrant expired on January 12, 2013 in accordance with its terms. For the years ended December 31, 2012 and 2013, we recognized expense of $17,190 and $0, respectively, which is included in operating expenses. We recognized expense based upon the fair market value of our stock at the date the shares were issuable, updated quarterly for non-exercised warrants, to Hansen.
	Stock Option Plans
	In April 2003, we adopted the Luna Innovations Incorporated 2003 Stock Plan, or the 2003 Plan. Under the 2003 Plan, our Board of Directors was authorized to grant both incentive and non-statutory stock options to our employees, directors and consultants to purchase Class B shares of Common Stock. Options generally had a life of 10 years and exercise price equal to or greater than the fair market value of the Class B Common Stock as determined by the Board of Directors. On February 4, 2006, our Board of Directors increased the number of shares reserved under the 2003 Plan to 9,715,000. There were options outstanding under the 2003 Plan to purchase an aggregate of 945,472 shares as of December 31, 2013. Following the adoption of the 2006 Equity Incentive Plan in January 2006, no shares or options are available for future grant under the 2003 Plan, except to satisfy grants outstanding as of June 5, 2006.
	In January 2006, we adopted our 2006 Equity Incentive Plan or the 2006 Plan. Under the 2006 Plan, our Board of Directors is authorized to grant both incentive and non-statutory stock options to purchase common stock and restricted stock awards to our employees, directors, and consultants. Stock option awards generally have a life of 10 years and exercise prices equal to the closing price of our common stock on the date of the option grant. On January 1 of each year, the number of shares available for issuance increases by the lesser of (a) 10% of the outstanding shares of our common stock on the last day of the preceding fiscal year; (b) 1,695,690 shares; or (c) such other amount as our Board of Directors may determine. A total of 8,872,540 and 10,468,175 shares were available for future grant under the 2006 Plan as of December 31, 2012 and 2013, respectively.
	Vesting for employees typically occurs over a five-year period.
	Total non-cash stock option expense for the years ended December 31, 2012 and 2013 was $1.9 million and $1.2 million, respectively.
	The following table sets forth the activity of the options to purchase common stock under the 2003 Plan and the 2006 Plan:
			Options Outstanding							Options Exercisable
			Number of			Price per		Weighted		Aggregate		Number of		Weighted		Aggregate
			Shares			Share Range		Average		Intrinsic		Shares		Average		Intrinsic
								Exercise		Value (1)				Exercise		Value (1)
								Price						Price
	Balance at January 1, 2012			4,641,039		$	0.35–6.74	$	2.23	$	1,509,270		3,206,994	$	2.23	$	1,258,740
	Forfeited			(64,245	)		0.65–5.50		1.91
	Exercised			(182,702	)		0.35–1.77		0.38
	Granted			1,028,038			1.40–1.75		1.67
	Balance at December 31, 2012			5,422,130		$	0.35–6.74	$	2.19	$	639,904		3,775,388	$	2.37	$	604,292
	Forfeited			(693,644	)		0.35–6.74		2.08
	Exercised			(137,097	)		0.35–1.18		0.56
	Granted			687,840			1.20–1.31		1.29
	Balance at December 31, 2013			5,279,229		$	0.35–6.55	$	2.11	$	784,154		4,012,378	$	2.28	$	697,826
	-1	The intrinsic value of an option represents the amount by which the market value of the stock exceeds the exercise price of the option of in-money options only. The prices represent the closing price of our Common Stock on the NASDAQ Capital Market on the respective dates.
						Options Outstanding						Options Exercisable
			Range of			Options		Weighted		Weighted		Options		Weighted
			Exercise Prices			Outstanding		Average		Average		Exercisable		Average
								Remaining		Exercise				Exercise
								Life in		Price				Price of
								Years						Options
														Exercisable
	Year ended December 31, 2012		$	0.35–6.74			5,422,130		6.39	$	2.19		3,775,388	$	2.37
	Year ended December 31, 2013		$	0.35–6.55			5,279,229		5.88	$	2.11		4,012,378	$	2.28
			Total intrinsic value of			Total fair value of
			options exercised			options vested
	Year ended December 31, 2012		$	215,541		$	1,170,738
	Year ended December 31, 2013		$	111,595		$	1,248,067
	For the years ended December 31, 2012 and 2013, the weighted average grant date fair value of options granted was $1.10 and $1.29, respectively. We estimate the fair value of options at the grant date using the Black-Scholes model.
	We will recognize $1.6 million over the remaining requisite service period. For all options granted through December 31, 2013, the weighted average remaining service period is 1.7 years.

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	9. Commitments and Contingencies
	Obligation under Operating Leases
	We lease facilities in Blacksburg, Charlottesville and Roanoke, Virginia under operating leases that as of December 31, 2013, were scheduled to expire between November 2014 and December 2018. Certain of the leases are subject to fixed escalations and provide for possible termination prior to their expiration dates. We recognize rent expense on such leases on a straight-line basis over the lease term. Rent expense under these leases recorded in our selling, general and administrative expense line on our statement of operations totaled approximately $1.3 million and $1.0 million, respectively, for the years ended December 31, 2012 and 2013. During 2013, we subleased a portion of the office space formerly occupied by Secure Computing and Communications group (“SCC”) to Mac-B. The amount of the sublease income recognized in 2013 was approximately $266,000. The sublease continues through April 30, 2014.
	We are obligated under operating leases covering certain equipment that expire at various dates during the next two years.
	Minimum future rentals, as of December 31, 2013, under the aforementioned operating leases for each of the next five years are:
	2014		1,014,131
	2015		503,760
	2016		299,635
	2017		305,628
	2018		311,740
		$	2,434,894
	Purchase Commitment
	In the fourth quarter of 2013 we executed two non-cancelable purchase orders totaling $1.4 million for multiple shipments of tunable lasers to be delivered over an 18-month period beginning in the fourth quarter of 2013. At December 31, 2013, approximately $1.4 million of this commitment remained.
	Royalty Agreement
	We have licensed certain third-party technologies from vendors for which we owe minimum royalties aggregating $1.8 million payable over the remaining patent terms of the underlying technology.

Employee_Profit_Sharing_Plan

Employee Profit Sharing Plan	12 Months Ended
	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]
Employee Profit Sharing Plan	10. Employee Profit Sharing Plan
	We maintain a salary reduction/profit-sharing plan under provisions of Section 401(k) of the Internal Revenue Code. The plan is offered to employees who have completed three months of service with us. We contribute 25% of the salary deferral elected by each employee up to a maximum deferral of 10% of annual salary.
	We contributed approximately $250,000 and $175,000 to the plan for the years ended December 31, 2012 and 2013, respectively.

Litigation_and_Other_Contingen

Litigation and Other Contingencies	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]
Litigation and Other Contingencies	11. Litigation and Other Contingencies
	From time to time, we may become involved in litigation in relation to claims arising out of our operations in the normal course of business. While management currently believes the amount of ultimate liability, if any, with respect to these actions will not materially affect our financial position, results of operations or liquidity, the ultimate outcome of any litigation is uncertain.
	We have made, and will continue to make, efforts to comply with current and future environmental laws. We anticipate that we could incur additional capital and operating costs in the future to comply with existing environmental laws and new requirements arising from new or amended statutes and regulations. In addition, because the applicable regulatory agencies have not yet promulgated final standards for some existing environmental programs, we cannot at this time reasonably estimate the cost for compliance with these additional requirements. The amount of any such compliance costs could be material. We cannot predict the impact that future regulations will impose upon our business.

Relationship_with_Major_Custom

Relationship with Major Customers	12 Months Ended
	Dec. 31, 2013
Relationshipwith Major Customers [Abstract]
Relationship with Major Customers	12. Relationship with Major Customers
	During the years ended December 31, 2012 and 2013, approximately 66% and 64%, respectively, of our consolidated revenues were attributable to contracts with the U.S. government.
	At December 31, 2012 and 2013, receivables with respect to contracts with the U.S. government represented 34% and 25% of total billed trade receivables, respectively.

Financial_Information_About_Se

Financial Information About Segments	12 Months Ended
	Dec. 31, 2013
Segment Reporting [Abstract]
Financial Information About Segments	13. Financial Information About Segments
	Our operations are divided into two operating segments: Technology Development and Products and Licensing. The Technology Development segment provides applied research to customers in our areas of focus.
	Our engineers and scientists collaborate with our network of government, academic and industry experts to identify technologies and ideas with promising market potential. We then compete to win fee-for-service contracts from government agencies and industrial customers who seek innovative solutions to practical problems that require new technology. The Technology Development segment derives its revenue primarily from services.
	The Products and Licensing segment develops and sells products or licenses technologies based on commercially viable concepts developed by the Technology Development segment. The Products and Licensing segment derives its revenue from product sales, funded product development and technology licenses.
	Our President and Chief Executive Officer and his direct reports collectively represent our chief operating decision makers, and they evaluate segment performance based primarily on revenue and operating income or loss.
	Information about the results of operations for each segment is set forth in the table below. There were no significant inter-segment sales during the two years ended December 31, 2013. There was an insignificant amount of product sales made outside the United States during these two years.
		Year Ended December 31,
		2012			2013
	Technology Development revenue	$	15,126,834		$	11,421,868
	Products and Licensing revenue		8,338,967			6,911,707
	Total revenue		23,465,801			18,333,575
	Technology Development operating loss		(1,703,370	)		(3,169,605	)
	Products and Licensing operating loss		(2,426,707	)		(4,865,705	)
	Total operating loss from continuing operations		(4,130,077	)	$	(8,035,310	)
	Depreciation, Technology Development	$	499,439		$	286,894
	Depreciation, Products and Licensing		266,327			266,862
	Amortization, Technology Development		212,790			197,765
	Amortization, Products and Licensing		113,471			183,956
	Additional segment information is as follows:
		December 31,
		2012			2013
	Total segment assets:
	Technology Development	$	13,342,725		$	10,208,433
	Products and Licensing		7,115,043			9,495,642
	Total	$	20,457,768		$	19,704,075
	Property plant and equipment and intangible assets, Technology Development	$	1,868,235		$	1,217,083
	Property plant and equipment and intangible assets, Products and Licensing	$	996,242		$	1,132,101

Quarterly_Results_unaudited

Quarterly Results (unaudited)	12 Months Ended
	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
Quarterly Results (unaudited)	14. Quarterly Results (unaudited)
	The following table sets forth our unaudited historical revenues, operating loss and net (loss) income by quarter during 2012 and 2013.
		Quarter Ended
	(Dollars in thousands,	March 31,			June 30,			September 30,			December 31,			March 31,			June 30,			September 30,			December 31,
	except per share amounts)	2012			2012			2012			2012			2013			2013			2013			2013
	Revenues:
	Technology	$	3,943		$	3,895		$	3,691		$	3,598		$	2,627		$	2,807		$	3,130		$	2,858
	Products and licensing		2,338			1.993			2,021			1,986			1,478			2,024			1,569			1,841
	Total revenues		6,281			5,888			5,712			5,584			4,105			4,831			4,699			4,699
	Gross Margin		2,533			2,315			2,266			1,778			1,135			1,777			1,677			1,460
	Operating loss		(867	)		(922	)		(1,020	)		(1,322	)		(2,241	)		(1,739	)		(1,302	)		(2,753	)
	Loss from continuing operations, net		(712	)		(681	)		(759	)		(1,076	)		(1,319	)		(1,035	)		(775	)		(2,379	)
	Income/(loss) from discontinued operations net of income taxes		378			438			539			489			4,105			83			161			356
	Net income/(loss)		(334	)		(243	)		(220	)		(587	)		2,786			(952	)		(614	)		(2,023	)
	Net (loss)/income attributable to common stockholders	$	(369	)	$	(269	)	$	(254	)	$	(612	)	$	2,762		$	(978	)	$	(640	)	$	(2,049	)
	Net loss per share from continuing operations:
	Basic	$	(0.05	)	$	(0.05	)	$	(0.05	)	$	(0.08	)	$	(0.09	)	$	(0.07	)	$	(0.05	)	$	(0.16	)
	Diluted	$	(0.05	)	$	(0.05	)	$	(0.05	)	$	(0.08	)	$	(0.09	)	$	(0.07	)	$	(0.05	)	$	(0.16	)
	Net income/(loss) per share from discontinued operations:
	Basic	$	0.03		$	0.03		$	0.04		$	0.03		$	0.29		$	0.01		$	0.01		$	0.03
	Diluted	$	0.03		$	0.03		$	0.04		$	0.03		$	0.29		$	0.01		$	0.01		$	0.03
	Net (loss)/income attributable to common stockholders:
	Basic	$	(0.03	)	$	(0.02	)	$	(0.02	)	$	(0.04	)	$	0.2		$	(0.07	)	$	(0.04	)	$	(0.14	)
	Diluted	$	(0.03	)	$	(0.02	)	$	(0.02	)	$	(0.04	)	$	0.2		$	(0.07	)	$	(0.04	)	$	(0.14	)
	Weighted average shares:
	Basic and Diluted		13,850,667			13,892,816			13,939,938			14,008,772			14,011,814			14,362,494			14,441,707			14,488,060

Discontinued_Operations

Discontinued Operations	12 Months Ended
	Dec. 31, 2013
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	15. Discontinued Operations
	On March 1, 2013, we completed the sale of our SCC which was part of our Technology Development segment, to an unaffiliated third party for a gross sales price of $6.1 million of cash. Prior to the sale, SCC provided innovative solutions designed to secure critical technologies within the U.S. government. SCC conducted applied research and provided services to the government in this area, with its revenues primarily derived from U.S. government contracts and purchase orders. Of the purchase price, we received approximately $5.4 million at closing and $110,000 on December 31, 2013. During December 2013, an additional $475,000 in purchase price was released to us from escrow and another $125,000 is in escrow and may be released 18 months, after the closing of the transaction, subject to any indemnification claims of the acquirer. In connection with the sale, we incurred approximately $0.9 million in transaction costs that included various charges related to investment banker and legal fees. In addition, the acquirer has entered into a sublease with us for the facilities historically occupied by SCC through April 30, 2014 for a total of $0.4 million. In the transaction, we sold the equipment, contracts and intellectual property associated with SCC. Approximately 20 employees of SCC transferred to the acquirer. Included in the transaction were current assets of approximately $0.2 million and long term assets with a net book value of approximately $0.1 million, at February 28, 2013. SCC accounted for 18.5% of our revenues, and 20.7% of our cost of revenues for the year ended December 31, 2012. We recorded an aggregate after-tax gain on the sale of SCC of $3.3 million or $0.20 per diluted share in our results of operations for the year ended December 31, 2013.
	Following the sale of SCC, we have continued to act on behalf of the purchaser and bill the government for certain contracts that have not yet been transferred by the government to the purchaser. We record this activity within (loss)/income from discontinued operations. During the year ended December 31, 2013, this amount was $1.7 million. We expect to continue recording such activity until all of these contracts are transferred to the purchaser by the government.
	The operating income from discontinued operations for the year ended December 31, 2013, is the result the allocation of the alternative minimum tax computation on the company’s results as a whole at December 31, 2013.
	On January 21, 2014, we sold our assets associated with the development of fiber optic shape sensing and localization for the medical field to affiliates of Intuitive Surgical, Inc., for total cash consideration of up to $30 million, including $6 million received at closing, and $6 million to be received within 90 days of closing, and up to $18 million that may be received in the future based on the achievement of certain technical milestones and royalties on system sales, if any. In the transaction, we sold equipment and intellectual property associated with our shape sensing technology. Ten employees were transferred to Intuitive. Included in the transaction were current assets of totaling approximately $0.2 million and long term assets with a net book value of approximately $0.2 million, at December 31, 2013. Our fiber optic shape sensing and localization for the medical field accounted for approximately 12% of our revenues, and 9% of our cost of revenues for the year ended December 31, 2013.
	We have reported the results of operations of SCC and our shape sensing business as discontinued operations in our consolidated financial statements. We allocated a portion of the consolidated tax expense to discontinued operations based on the ratio of the discontinued group’s income or loss before allocations.
	The key components of income/ (loss) from discontinued operations were as follows:
		Year Ended December 31,
		2012		2013
	Net revenues	$	8,883,202	$	5,909,375
	Cost of revenues		5,337,336		3,486,200
	Operating expenses		574,446		229,745
	Income/(loss) before income taxes		2,971,420		2,193,430
	Allocated tax expense/(benefit)		1,127,981		879,819
	Operating income/(loss) from discontinued operations		1,843,439		1,313,611
	Gain on sale, net of $1.5 million of related income taxes		—		3,391,639
	Income from discontinued operations, net of income taxes ($1.0 million and $2.4 million, respectively)	$	1,843,439	$	4,705,250

Valuation_and_Qualifying_Accou

Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2013
Valuation and Qualifying Accounts [Abstract]
Valuation and Qualifying Accounts
	Exhibit 99.4
	Schedule II
	Luna Innovations Incorporated
	Valuation and Qualifying Accounts
	Column A	Column B		Column C		Column D			Column E		Column F
		Balance		Charged		Deductions			Valuation		Balance at
		at beginning		to costs					against		end
		of Period		and					asset		of period
				expenses
	Year Ended December 31, 2013
	Reserves deducted from assets to which they apply:
	Inventory obsolescence	$	86,186	$	—	$	(11,435	)	$	—	$	74,751
	Allowances for doubtful Accounts	$	—	$	134,811	$	—		$	—	$	134,811
		$	86,186	$	134,811	$	(11,435	)	$	—	$	209,562
	Year Ended December 31, 2012
	Reserves deducted from assets to which they apply:
	Inventory obsolescence	$	147,676	$	—	$	(61,490	)	$	—	$	86,186
	Allowances for doubtful Accounts	$	22,372	$	—	$	(22,372	)	$	—	$	—
		$	170,048	$	—	$	(83,862	)	$	—	$	86,186

Organization_and_Summary_of_Si1

Organization and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]
Nature of Operations	Luna Innovations Incorporated (“We” 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 develop, manufacture and market fiber optic sensing and test & measurement products focused on bringing new and innovative technology solutions to measure, monitor, protect and improve critical processes in the aerospace, automotive, energy, composite, telecommunications and defense industries. Our business model is designed to accelerate the process of bringing new and innovative products to market. We use our in-house technical expertise to perform applied research services on government-funded projects across a range of technologies and also for corporate customers in the fiber optic sensing area. We are organized into two business segments: our Technology Development segment and our Products and Licensing segment. Our Technology Development segment performs applied research principally on government-funded projects. Most of the government funding in our Technology Development segment is derived from the U.S. Government’s Small Business Innovation Research, or SBIR, program coordinated by the U.S. Small Business Administration, or SBA. Our Products and Licensing segment focuses on fiber optic test and measurement, sensing, and instrumentation products.
	We have a history of net losses and negative cash flow from operations. We have historically managed our liquidity through cost reduction initiatives, debt financings and capital markets transactions.
	Although there can be no guarantees, we believe that our current cash balance, including the proceeds from the sale of our medical shape sensing business to Intuitive in January 2014 described in Note 15, our cash flow from operations, and the funds available to us under the Credit Facility described in Note 3 below, provide adequate liquidity for us to meet our working capital needs through 2014.
Discontinued Operations	Discontinued Operations
	The Company’s Board of Directors and management determined that it would be in the best interest of the Company’s stockholders to sell the Secure Computing and Communication (“SCC”) group, which was part of the Technology Development segment, and medical shape sensing shape sensing business, which was part of the Product and Licensing Segment. On March 1, 2013, we completed the sale of our SCC for approximately $6.1 million. On January 21, 2014 we sold our assets associated with the medical shape sensing business for approximately $30.0 million.
Consolidation Policy	Consolidation Policy
	Our consolidated financial statements are prepared in accordance with accounting principles generally accepted in the United States, or GAAP and include the accounts of the Company and its wholly owned subsidiaries. We eliminate from our financial results all significant intercompany transactions. We do not have any investments in entities we believe are variable interest entities for which the Company is the primary beneficiary.
Use of Estimates	Use of Estimates
	The preparation of our consolidated financial statements in accordance with GAAP requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses and the disclosure of contingent assets and liabilities in our consolidated financial statements and accompanying notes.
	Although these estimates are based on our knowledge of current events and actions we may undertake in the future, actual results may differ from such estimates and assumptions.
Technology Development Revenues	Technology Development Revenues
	We perform research and development for U.S. government agencies, educational institutions and commercial organizations. We recognize revenues under research contracts when a contract has been executed, the contract price is fixed and determinable, delivery of services or products has occurred and collection of the contract price is considered reasonably assured. Revenue is earned under cost reimbursable, time and materials and fixed price contracts. Direct contract costs are expensed as incurred.
	Under cost reimbursable contracts, we are reimbursed for costs that are determined to be reasonable, allowable and allocable to the contract and are paid a fixed fee representing the profit negotiated between us and the contracting agency. Revenue from cost reimbursable contracts is recognized as costs are incurred plus a portion of the fee earned. Revenue from time and materials contracts is recognized based on direct labor hours expended at contract billing rates plus other billable direct costs.
	Revenue from fixed price research contracts that involve the delivery of services and a prototype model is recognized under the percentage of completion method. Fixed price arrangements that involve the delivery of research reports are recognized under the proportional performance method based upon the ratio of costs incurred to achieve contract milestones to total estimated cost as this method more accurately measures performance under these arrangements. Losses on contracts, if any, are recognized in the period in which they become known.
Intellectual Property License Revenues	Intellectual Property License Revenues
	Amounts received from third parties for licenses to our intellectual property are recognized when earned under the terms of the agreements. Revenues are recognized upon transfer of the license unless we have continuing obligations for which fair value cannot be established, in which case the revenues are recognized over the period of the obligation. If there are extended payment terms, license fee revenues are recognized as these payments become due and collection is reasonably assured. We consider all arrangements with payment terms extending beyond 12 months not to be fixed and determinable.
	Certain of our license arrangements have also required us to enter into research and development agreements. Accordingly, we allocate our arrangement fees to the various elements based upon objective reliable evidence of fair value, if available. For those arrangements in which evidence of fair value is not available, we defer revenues from any up-front payments and recognize them over the service period in the arrangement. Certain of these arrangements also include the payment of performance bonuses based upon the achievement of specific milestones. Generally, there are no assurances at the onset of these arrangements that the milestones will be achieved. As such, fees related to such milestones are excluded from the initial allocation of the arrangement fee and are recognized upon achievement of the milestone provided that all other revenue recognition criteria are met.
Product Sales Revenues	Product Sales Revenues
	Revenues from product sales are generated by the sale of commercial products and services under various sales programs to the end user and through distribution channels. We sell fiber optic sensing systems to end users for use in numerous fiber optic based measurement applications. Revenues are recorded net of applicable sales taxes collected from customers and payable to state or local governmental entities.
	We recognize revenue relating to our products when persuasive evidence of an arrangement exists, delivery has occurred, the selling price is fixed or determinable and collectability of the resulting receivable is reasonably assured.
	For multi-element arrangements that include tangible products that contain software that is essential to the tangible product’s functionality, we allocate revenue to all deliverables based on their relative selling prices. Other deliverables include extended warranty, training and various add-on products. In such circumstances, we use a hierarchy to determine the selling price to be used for allocating revenue to deliverables: (i) vendor-specific objective evidence of fair value or VSOE, (ii) third-party evidence of selling price or TPE, and (iii) best estimate of the selling price or ESP. VSOE generally exists only when we sell the deliverable separately and is the price actually charged by us for that deliverable. ESPs reflect our best estimates of what the selling prices of elements would be if they were sold regularly on a stand-alone basis.
	Our process for determining our ESP for deliverables without VSOE or TPE considers multiple factors that may vary depending upon the unique facts and circumstances related to each deliverable. Key factors considered in developing the ESPs include prices charged by us for similar offerings, our historical pricing practices, the nature of the deliverables, and the relative ESP of all of the deliverables as compared to the total selling price of the product. We may also consider, when appropriate, the impact of other products and services on selling price assumptions when developing and reviewing our ESPs.
	Revenues from product sales that require no ongoing obligations are recognized as revenues when shipped to the customer, title has passed and collection is reasonably assured. In transactions in which a right-of-return exists, revenues are deferred until acceptance has occurred and the period for the right-of-return has lapsed.
Allowance for Uncollectible Receivables	Allowance for Uncollectible Receivables
	Accounts receivable are recorded at their face amount, less an allowance for doubtful accounts. We review the status of our uncollected receivables on a regular basis. In determining the need for an allowance for uncollectible receivables, we consider our customers’ financial stability, past payment history and other factors that bear on the ultimate collection of such amounts. The allowance was $0 at December 31, 2012 and approximately $134,811 at December 31, 2013.
Cash Equivalents	Cash Equivalents
	We consider all highly liquid investments purchased with maturities of three months or less to be cash equivalents. To date, we have not incurred losses related to cash and cash equivalents. The Company regularly maintains cash balances with financial institutions which exceed Federal Deposit Insurance Corporation (“FDIC”) insurance limits. At December 31, 2013 and December 31, 2012, the Company had approximately $7.5 million and $6.1 million, respectively, in excess of FDIC insured limits.
Fair Value Measurements	Fair Value Measurements
	The Company’s financial assets and liabilities are measured at fair value, which is defined as the price that would be received to sell an asset, or paid to transfer a liability, in an orderly transaction between market participants. Valuation techniques are based on observable or unobservable inputs. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect the Company’s market assumptions. These two types of inputs have created the following fair value hierarchy:
		•		Level 1—Quoted prices for identical instruments in active markets.
		•		Level 2—Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which 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 and accounts payable approximate fair value because of the short-term nature of these instruments. The carrying value of the promissory notes approximate fair value as the interest rate is comparable to the interest rate on our credit facility with Silicon Valley Bank, which we consider to be at market.
Property and Equipment	Property and Equipment
	Property and equipment are stated at cost less accumulated depreciation. We record depreciation using the straight-line method over the following estimated useful lives:
	Equipment		3 – 7 years
	Furniture and fixtures		7 years
	Software		3 years
	Leasehold improvements		Lesser of lease term or life of improvements
Intangible Assets	Intangible Assets
	Intangible assets consist of patents related to certain intellectual property that we have developed or acquired. We amortize our patents over their estimated useful life of five years, and analyze them whenever events or circumstances indicate that the carrying amount may not be recoverable to determine whether their carrying value has been impaired.
Research, Development and Engineering	Research, Development and Engineering
	Research, development and engineering expenses not related to contract performance are expensed as incurred. We expensed $2.8 million and $3.1 million of non-contract related research, development and engineering expenses for the years ended December 31, 2012 and 2013, respectively.
Valuation of Long-Lived Assets	Valuation of Long-Lived Assets
	We review our long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets is measured by comparing the carrying amount of an asset to future undiscounted net cash flows expected to be generated by the asset. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds their fair value. Assets to be disposed of by sale are reflected at the lower of their carrying amount or fair value less cost to sell.
Inventory	Inventory
	Inventory consists of finished goods, work in process and parts valued at the lower of cost (determined on the first-in, first-out basis) or market. We provide reserves for estimated obsolescence or unmarketable inventory equal to the difference between the carrying value of the inventory and the estimated market value based upon assumptions about future demand and market conditions.
Net Loss per Share	Net Loss per Share
	Basic per share data is computed by dividing net loss attributable to common stockholders by the weighted average number of shares outstanding during the period. Diluted per share data is computed by dividing net loss attributable to common stockholders 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 common shares 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 effect of 2.4 million and 2.3 million common stock equivalents (which include outstanding warrants and stock options) are not included for the years ended December 31, 2012 and 2013 respectively, as they are antidilutive to earnings per share due to the Company’s loss from continuing operations.
Stock-Based Compensation	Stock-Based Compensation
	We have a stock-based compensation plan, which is described further in Note 8. We recognize compensation expense based upon the fair value of the underlying equity award as of the date of grant. The Company has elected to use the Black-Scholes option pricing model to value any awards granted. We amortize stock-based compensation for such awards on a straight-line method over the requisite service period of the awards taking into account the effects of the employees’ expected exercise and post-vesting employment termination behavior.
	The Company recognizes expense for equity instruments issued to non-employees based upon the fair value of the equity instruments issued.
	The fair value of each option granted is estimated as of the grant date using the Black-Scholes option pricing model with the following assumptions:
			2012		2013
	Risk-free interest rate range		1.02% – 1.49%		1.27% – 2.34%
	Expected life of option-years		7.5		7.5
	Expected stock price volatility		108%		108%
	Executive turnover rates		—  %		—  %
	Non-executive turnover rates		18.50%		14.70%
	Expected dividend yield		—		—
	The risk-free interest rate is based on U.S. Treasury interest rates, the terms of which are consistent with the expected life of the stock options. Expected volatility is based upon the average volatility of our common stock. The expected life and estimated post-employment termination behavior is based upon historical experience of homogeneous groups, executives and non-executes, within our company. We do not currently issue dividends nor do we expect to in the foreseeable future.
Advertising	Advertising
	We expense the cost of advertising as incurred. Historically such amounts have not been significant to our operations.
Income Taxes	Income Taxes
	We account for income taxes using the liability method. Deferred tax assets or liabilities are determined based on the difference between the financial statement and tax basis of assets and liabilities as measured by the enacted tax rates which will be in effect when the differences reverse. A valuation allowance against net deferred tax assets is provided unless we conclude it is more likely than not that the deferred tax assets will be realized.
	We recognize tax benefits from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by taxing authorities.

Organization_and_Summary_of_Si2

Organization and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Property and Equipment Estimated Useful Lives	Property and equipment are stated at cost less accumulated depreciation. We record depreciation using the straight-line method over the following estimated useful lives:
	Equipment	3 – 7 years
	Furniture and fixtures	7 years
	Software	3 years
	Leasehold improvements	Lesser of lease term or life of improvements
Assumptions Used to Estimate Fair Value of Option Granted	The fair value of each option granted is estimated as of the grant date using the Black-Scholes option pricing model with the following assumptions:
		2012	2013
	Risk-free interest rate range	1.02% – 1.49%	1.27% – 2.34%
	Expected life of option-years	7.5	7.5
	Expected stock price volatility	108%	108%
	Executive turnover rates	—  %	—  %
	Non-executive turnover rates	18.50%	14.70%
	Expected dividend yield	—	—

Inventory_Tables

Inventory (Tables)	12 Months Ended
	Dec. 31, 2013
Inventory Disclosure [Abstract]
Components of Inventory	Components of inventory are as follows:
		December 31,		December 31,
		2012		2013
	Finished goods	$	195,578	$	719,574
	Work-in-process		252,227		361,754
	Parts		2,975,297		2,339,595
			3,423,102		3,420,923
	Less: Inventory reserves		86,186		74,746
	Total inventory, net	$	3,336,916	$	3,346,177

Debt_Tables

Debt (Tables)	12 Months Ended
	Dec. 31, 2013
Debt Disclosure [Abstract]
Summary of Debt Outstanding	The following table presents a summary of debt outstanding as of December 31, 2012 and 2013:
		December 31,
		2012		2013
	Silicon Valley Bank Term Loan	$	3,625,000	$	2,125,000
	Less: current portion		1,500,000		1,500,000
	Total long-term debt	$	2,125,000	$	625,000
Maturities On Long-term Debt	Maturities on long-term debt are as follows:
	Year	Amount
	2014		1,500,000
	2015		625,000
	Total	$	2,125,000
Costs Associated with Loans Outstanding	Costs associated with loans outstanding were as follows:
		Years Ended December 31,
		2012		2013
	Interest expense	$	286,529	$	189,151
	Amortization of transaction costs		25,843		18,387
	Total interest expense	$	312,372	$	207,538

Accounts_ReceivableTrade_Table

Accounts Receivable-Trade (Tables)	12 Months Ended
	Dec. 31, 2013
Receivables [Abstract]
Components of Accounts Receivable	Accounts receivable consist of the following:
		December 31,
		2012		2013
	Billed	$	5,175,395	$	3,552,184
	Unbilled		1,873,376		1,755,439
	Other		10,864		235,469
		$	7,059,635	$	5,543,092
	Less: allowance for doubtful accounts		—		(134,811	)
		$	7,059,635	$	5,408,281

Property_and_Equipment_Tables

Property and Equipment (Tables)	12 Months Ended
	Dec. 31, 2013
Property, Plant and Equipment [Abstract]
Property Plant and Equipment Net	Property and equipment, net, consists of the following at:
		December 31,
		2012			2013
	Building	$	69,556		$	69,556
	Equipment		7,222,208			7,239,017
	Furniture and fixtures		622,944			562,485
	Software		1,185,290			1,092,484
	Leasehold improvements		3,196,590			3,168,377
			12,296,588			12,131,919
	Less—accumulated depreciation		(9,869,950	)		(10,071,210	)
		$	2,426,638		$	2,060,709

Intangible_Assets_Tables

Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Intangible Assets	The following is a summary of intangible assets:
		December 31,
		2012			2013
	Patent costs	$	2,264,441		$	2,496,560
	Accumulated amortization		(1,826,602	)		(2,208,085	)
		$	437,839		$	288,475
Estimated Aggregate Amortization Based On Net Value Of Intangible Assets	Estimated aggregate amortization, based on the net value of intangible assets at December 31, 2013, for each of the next five years is as follows:
	Year Ending December 31,
	2014		188,616
	2015		53,371
	2016		24,844
	2017		10,578
	2018		6,013
		$	283,422

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Deferred Tax Assets and Liabilities	Deferred tax assets and liabilities consist of the following components:
		2012						2013
		Current			Long-Term			Current			Long-Term
	Bad debt and inventory reserve	$	41,243		$	—		$	88,077		$	—
	Deferred revenue		—			—			—			59,673
	Depreciation and amortization		—			1,005,697			—			1,024,784
	Net operating loss carryforwards		—			11,358,044			—			10,896,286
	Research and development credits		—			386,161			—			386,161
	Accrued liabilities		731,831			—			836,011			—
	Deferred compensation		—			123,797			—			163,655
	Stock-based compensation		—			1,208,970			—			1,519,513
	AMT credit		—			28,555			—			42,711
	Total		773,074			14,111,224			924,088			14,092,783
	Valuation allowance		(773,074	)		(14,111,224	)		(924,088	)		(14,092,783	)
	Net deferred tax asset	$	—		$	—		$	—		$	—
Reconciliation of Expected Income Tax Benefit (Expense) to Actual Income Tax Expense Benefit (Expense)	The reconciliation of expected income tax benefit (expense) to actual income tax expense benefit (expense) was as follows:
		2012			2013
	Statutory federal rate		34	%		34	%
	State tax net of federal benefit		3.73	%		3.96	%
	Change in valuation allowance		(4.16	)%		(16.88	)%
	Incentive stock options		(35.60	)%		(41.60	)%
	Provision to return adjustments		(1.80	)%		24.11	%
	Meals and entertainment		(0.74	)%		(1.33	)%
	Other Permanent differences		(0.60	)%		(4.37	)%
	Income tax (expense)		(5.17	)%		(2.11	)%
Components of Income Tax Expense	The income tax expense consists of the following for:
		2012			2013
	Current:
	Federal	$	18,268		$	14,071
	State		3,149			—
	Deferred Federal		—			—
	Deferred State		—			—
	Income tax expense	$	21,417		$	14,071

Stockholders_Equity_Tables

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2013
Equity [Abstract]
Activity of Stock Options	The following table sets forth the activity of the options to purchase common stock under the 2003 Plan and the 2006 Plan:
			Options Outstanding							Options Exercisable
			Number of			Price per		Weighted		Aggregate		Number of		Weighted		Aggregate
			Shares			Share Range		Average		Intrinsic		Shares		Average		Intrinsic
								Exercise		Value (1)				Exercise		Value (1)
								Price						Price
	Balance at January 1, 2012			4,641,039		$	0.35–6.74	$	2.23	$	1,509,270		3,206,994	$	2.23	$	1,258,740
	Forfeited			(64,245	)		0.65–5.50		1.91
	Exercised			(182,702	)		0.35–1.77		0.38
	Granted			1,028,038			1.40–1.75		1.67
	Balance at December 31, 2012			5,422,130		$	0.35–6.74	$	2.19	$	639,904		3,775,388	$	2.37	$	604,292
	Forfeited			(693,644	)		0.35–6.74		2.08
	Exercised			(137,097	)		0.35–1.18		0.56
	Granted			687,840			1.20–1.31		1.29
	Balance at December 31, 2013			5,279,229		$	0.35–6.55	$	2.11	$	784,154		4,012,378	$	2.28	$	697,826
	-1	The intrinsic value of an option represents the amount by which the market value of the stock exceeds the exercise price of the option of in-money options only. The prices represent the closing price of our Common Stock on the NASDAQ Capital Market on the respective dates.
Activity of Stock Option by Exercise Price Range
						Options Outstanding						Options Exercisable
			Range of			Options		Weighted		Weighted		Options		Weighted
			Exercise Prices			Outstanding		Average		Average		Exercisable		Average
								Remaining		Exercise				Exercise
								Life in		Price				Price of
								Years						Options
														Exercisable
	Year ended December 31, 2012		$	0.35–6.74			5,422,130		6.39	$	2.19		3,775,388	$	2.37
	Year ended December 31, 2013		$	0.35–6.55			5,279,229		5.88	$	2.11		4,012,378	$	2.28
			Total intrinsic value of			Total fair value of
			options exercised			options vested
	Year ended December 31, 2012		$	215,541		$	1,170,738
	Year ended December 31, 2013		$	111,595		$	1,248,067

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]
Future Minimum Rental Payments for Operating Leases	Minimum future rentals, as of December 31, 2013, under the aforementioned operating leases for each of the next five years are:
	2014		1,014,131
	2015		503,760
	2016		299,635
	2017		305,628
	2018		311,740
		$	2,434,894

Financial_Information_About_Se1

Financial Information About Segments (Tables)	12 Months Ended
	Dec. 31, 2013
Segment Reporting [Abstract]
Information About Results of Operations for Each Segment	Information about the results of operations for each segment is set forth in the table below. There were no significant inter-segment sales during the two years ended December 31, 2013. There was an insignificant amount of product sales made outside the United States during these two years.
		Year Ended December 31,
		2012			2013
	Technology Development revenue	$	15,126,834		$	11,421,868
	Products and Licensing revenue		8,338,967			6,911,707
	Total revenue		23,465,801			18,333,575
	Technology Development operating loss		(1,703,370	)		(3,169,605	)
	Products and Licensing operating loss		(2,426,707	)		(4,865,705	)
	Total operating loss from continuing operations		(4,130,077	)	$	(8,035,310	)
	Depreciation, Technology Development	$	499,439		$	286,894
	Depreciation, Products and Licensing		266,327			266,862
	Amortization, Technology Development		212,790			197,765
	Amortization, Products and Licensing		113,471			183,956
Segment Information	Additional segment information is as follows:
		December 31,
		2012			2013
	Total segment assets:
	Technology Development	$	13,342,725		$	10,208,433
	Products and Licensing		7,115,043			9,495,642
	Total	$	20,457,768		$	19,704,075
	Property plant and equipment and intangible assets, Technology Development	$	1,868,235		$	1,217,083
	Property plant and equipment and intangible assets, Products and Licensing	$	996,242		$	1,132,101

Quarterly_Results_unaudited_Ta

Quarterly Results (unaudited) (Tables)	12 Months Ended
	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Information	The following table sets forth our unaudited historical revenues, operating loss and net (loss) income by quarter during 2012 and 2013.
		Quarter Ended
	(Dollars in thousands,	March 31,			June 30,			September 30,			December 31,			March 31,			June 30,			September 30,			December 31,
	except per share amounts)	2012			2012			2012			2012			2013			2013			2013			2013
	Revenues:
	Technology	$	3,943		$	3,895		$	3,691		$	3,598		$	2,627		$	2,807		$	3,130		$	2,858
	Products and licensing		2,338			1.993			2,021			1,986			1,478			2,024			1,569			1,841
	Total revenues		6,281			5,888			5,712			5,584			4,105			4,831			4,699			4,699
	Gross Margin		2,533			2,315			2,266			1,778			1,135			1,777			1,677			1,460
	Operating loss		(867	)		(922	)		(1,020	)		(1,322	)		(2,241	)		(1,739	)		(1,302	)		(2,753	)
	Loss from continuing operations, net		(712	)		(681	)		(759	)		(1,076	)		(1,319	)		(1,035	)		(775	)		(2,379	)
	Income/(loss) from discontinued operations net of income taxes		378			438			539			489			4,105			83			161			356
	Net income/(loss)		(334	)		(243	)		(220	)		(587	)		2,786			(952	)		(614	)		(2,023	)
	Net (loss)/income attributable to common stockholders	$	(369	)	$	(269	)	$	(254	)	$	(612	)	$	2,762		$	(978	)	$	(640	)	$	(2,049	)
	Net loss per share from continuing operations:
	Basic	$	(0.05	)	$	(0.05	)	$	(0.05	)	$	(0.08	)	$	(0.09	)	$	(0.07	)	$	(0.05	)	$	(0.16	)
	Diluted	$	(0.05	)	$	(0.05	)	$	(0.05	)	$	(0.08	)	$	(0.09	)	$	(0.07	)	$	(0.05	)	$	(0.16	)
	Net income/(loss) per share from discontinued operations:
	Basic	$	0.03		$	0.03		$	0.04		$	0.03		$	0.29		$	0.01		$	0.01		$	0.03
	Diluted	$	0.03		$	0.03		$	0.04		$	0.03		$	0.29		$	0.01		$	0.01		$	0.03
	Net (loss)/income attributable to common stockholders:
	Basic	$	(0.03	)	$	(0.02	)	$	(0.02	)	$	(0.04	)	$	0.2		$	(0.07	)	$	(0.04	)	$	(0.14	)
	Diluted	$	(0.03	)	$	(0.02	)	$	(0.02	)	$	(0.04	)	$	0.2		$	(0.07	)	$	(0.04	)	$	(0.14	)
	Weighted average shares:
	Basic and Diluted		13,850,667			13,892,816			13,939,938			14,008,772			14,011,814			14,362,494			14,441,707			14,488,060

Discontinued_Operations_Tables

Discontinued Operations (Tables)	12 Months Ended
	Dec. 31, 2013
Discontinued Operations and Disposal Groups [Abstract]
Components of (Loss) Income from Discontinued Operations	The key components of income/ (loss) from discontinued operations were as follows:
		Year Ended December 31,
		2012		2013
	Net revenues	$	8,883,202	$	5,909,375
	Cost of revenues		5,337,336		3,486,200
	Operating expenses		574,446		229,745
	Income/(loss) before income taxes		2,971,420		2,193,430
	Allocated tax expense/(benefit)		1,127,981		879,819
	Operating income/(loss) from discontinued operations		1,843,439		1,313,611
	Gain on sale, net of $1.5 million of related income taxes		—		3,391,639
	Income from discontinued operations, net of income taxes ($1.0 million and $2.4 million, respectively)	$	1,843,439	$	4,705,250

Organization_and_Summary_of_Si3

Organization and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended		1 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Jan. 31, 2010	Jan. 21, 2014	Mar. 31, 2013
	Segment
Significant Accounting Policies [Line Items]
Number of operating segments	2
Sale price of assets to an unaffiliated third party				$30,000,000	$6,100,000
Allowance for uncollectible receivables	134,811	0
Cash Equivalents	7,500,000	6,100,000
Research, development, and engineering	3,113,193	2,772,438
Patents
Significant Accounting Policies [Line Items]
Finite lived intangible asset, useful life	5 years
Stock Option and Warrant
Significant Accounting Policies [Line Items]
Antidilutive securities excluded from computation of earnings per share amount	2,300,000	2,400,000
Carilion Clinic
Significant Accounting Policies [Line Items]
Senior convertible Promissory Notes principal amount converted			5,000,000
Accrued interest converted			1,200,000
Warrants issued in exchange of notes payable, shares			356,000
Warrant exercise price (in dollars per share)			2.5
Percentage of Dividend Payable On Series A Convertible Preferred Stock			6.00%
Dividend on preferred stock, shares of common stock issuable	314,525
Conversion of stock description	Each share of Series A Convertible Preferred Stock may be converted into one share of our common stock at the option of the holder.
Maximum | Carilion Clinic
Significant Accounting Policies [Line Items]
Preferred stock liquidation preference value			$6,200,000
Before Amendment | Carilion Clinic
Significant Accounting Policies [Line Items]
Warrant exercise price (in dollars per share)			7.98
Before Amendment | Maximum | Carilion Clinic
Significant Accounting Policies [Line Items]
Warrant exercisable date			31-Dec-20
After Amendment | Carilion Clinic
Significant Accounting Policies [Line Items]
Warrant exercise price (in dollars per share)			2.5
Warrant exercisable date			31-Dec-20
Series A Preferred Stock | Carilion Clinic
Significant Accounting Policies [Line Items]
Preferred stock issued in exchange of notes payable, shares			1,321,514

Organization_and_Summary_of_Si4

Organization and Summary of Significant Accounting Policies - Property and Equipment Estimated Useful Lives (Detail)	12 Months Ended
	Dec. 31, 2013
Equipment | Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	3 years
Equipment | Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	7 years
Furniture and Fixtures
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	7 years
Software
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	3 years
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	Lesser of lease term or life of improvements

Organization_and_Summary_of_Si5

Organization and Summary of Significant Accounting Policies - Assumptions Used to Estimate Fair Values of Option Granted (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Risk-free interest rate	1.27%	1.02%
Risk-free interest rate, maximum	2.34%	1.49%
Expected life of option-years	7 years 6 months	7 years 6 months
Expected stock price volatility	108.00%	108.00%
Executive turnover rates	0.00%	0.00%
Non-executive turnover rates	14.70%	18.50%
Expected dividend yield	0.00%	0.00%

Inventory_Components_of_Invent

Inventory - Components of Inventory (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Inventory Disclosure [Abstract]
Finished goods	$719,574	$195,578
Work-in-process	361,754	252,227
Parts	2,339,595	2,975,297
Total inventory, gross	3,420,923	3,423,102
Less: Inventory reserves	74,746	86,186
Total inventory, net	$3,346,177	$3,336,916

Debt_Additional_Information_De

Debt - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Mar. 21, 2013	Jan. 21, 2014
	Installment
Debt Instrument [Line Items]
Long-term debt obligation	$2,125,000
Long-term debt obligation, excluding current maturities	625,000	2,125,000
Current portion of long term debt obligation	1,500,000	1,500,000
Line of Credit, outstanding amount	0
Credit facility, available borrowing capacity	1,000,000
Term Loan
Debt Instrument [Line Items]
Debt, face amount	6,000,000
Debt, number of monthly payment	48
Debt instrument frequency of payment	Monthly
Debt, additional interest above prime rate	2.00%
Long-term debt obligation	2,100,000
Long-term debt obligation, excluding current maturities	600,000
Current portion of long term debt obligation	1,500,000
Effective interest rate	6.00%
Term Loan | Silicon Valley Bank Term Loan
Debt Instrument [Line Items]
Long-term debt obligation	2,125,000	3,625,000
Revolving Credit Facility | Fourth Loan Modification Agreement
Debt Instrument [Line Items]
Maintaining minimum cash balance as per covenant			5,000,000
Revolving Credit Facility | Fourth Loan Modification Agreement | Subsequent Event
Debt Instrument [Line Items]
Maintaining minimum cash balance as per covenant				3,500,000
Revolving Credit Facility | Silicon Valley Bank Term Loan | Second and Third Amendment
Debt Instrument [Line Items]
Debt, additional interest above prime rate	1.25%
Credit facility, maximum borrowing capacity	1,000,000
Unused Line of Credit fee percentage	0.25%
Termination fee	$10,000
Credit facility, maturity date	18-May-14

Debt_Summary_of_Debt_Outstandi

Debt - Summary of Debt Outstanding (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Long term debt	$2,125,000
Less: current portion	1,500,000	1,500,000
Total long-term debt	625,000	2,125,000
Term Loan
Debt Instrument [Line Items]
Long term debt	2,100,000
Less: current portion	1,500,000
Total long-term debt	600,000
Silicon Valley Bank Term Loan | Term Loan
Debt Instrument [Line Items]
Long term debt	$2,125,000	$3,625,000

Debt_Maturities_on_Long_Term_D

Debt - Maturities on Long Term Debt (Detail) (USD $)	Dec. 31, 2013
Debt Disclosure [Abstract]
2014	$1,500,000
2015	625,000
Total	$2,125,000

Debt_Costs_Associated_With_Loa

Debt - Costs Associated With Loans Outstanding (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Debt Disclosure [Abstract]
Interest expense	$189,151	$286,529
Amortization of transaction costs	18,387	25,843
Total interest expense	$207,538	$312,372

Accounts_ReceivableTrade_Compo

Accounts Receivable-Trade - Components of Accounts Receivable (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Receivables [Abstract]
Billed	$3,552,184	$5,175,395
Unbilled	1,755,439	1,873,376
Other	235,469	10,864
Accounts Receivable, Gross, Total	5,543,092	7,059,635
Less: allowance for doubtful accounts	-134,811	0
Accounts Receivable, Net, Total	$5,408,281	$7,059,635

Property_and_Equipment_Compone

Property and Equipment - Components of Property and Equipment, Net (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Abstract]
Building	$69,556	$69,556
Equipment	7,239,017	7,222,208
Furniture and fixtures	562,485	622,944
Software	1,092,484	1,185,290
Leasehold improvements	3,168,377	3,196,590
Property, Plant and Equipment, Gross, Total	12,131,919	12,296,588
Less-accumulated depreciation	-10,071,210	-9,869,950
Property and equipment, net	$2,060,709	$2,426,638

Property_and_Equipment_Additio

Property and Equipment - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Abstract]
Depreciation	$0.50	$0.80

Intangible_Assets_Summary_of_I

Intangible Assets - Summary of Intangible Assets (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	($2,208,085)	($1,826,602)
Intangible assets, net	288,475	437,839
Patents
Finite-Lived Intangible Assets [Line Items]
Finite lived intangible assets gross	$2,496,560	$2,264,441

Intangible_Assets_Additional_I

Intangible Assets - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense	$0.40	$0.30

Intangible_Assets_Estimated_Ag

Intangible Assets - Estimated Aggregate Amortization (Detail) (USD $)	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
2014	$188,616
2015	53,371
2016	24,844
2017	10,578
2018	6,013
Finite-Lived Intangible Assets, Net, Total	$283,422

Income_Taxes_Deferred_Tax_Asse

Income Taxes - Deferred Tax Assets and Liabilities (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Deferred Income Tax Assets And Liabilities [Line Items]
Total, current	$924,088	$773,074
Valuation allowance, current	-924,088	-773,074
Net deferred tax asset, current	0	0
Total	14,092,783	14,111,224
Valuation allowance	-14,092,783	-14,111,224
Net deferred tax asset	0	0
Deferred Tax Assets Noncurrent
Deferred Income Tax Assets And Liabilities [Line Items]
Deferred revenue	59,673
Depreciation and amortization	1,024,784	1,005,697
Net operating loss carryforwards	10,896,286	11,358,044
Research and development credits	386,161	386,161
Deferred compensation	163,655	123,797
Stock-based compensation	1,519,513	1,208,970
AMT credit	42,711	28,555
Deferred Tax Assets Current
Deferred Income Tax Assets And Liabilities [Line Items]
Bad debt and inventory reserve	88,077	41,243
Accrued liabilities	$836,011	$731,831

Income_Taxes_Reconciliation_of

Income Taxes - Reconciliation of Expected Income Tax Benefit (Expense) to Actual Income Tax Expense Benefit (Expense) (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Statutory federal rate	34.00%	34.00%
State tax net of federal benefit	3.96%	3.73%
Change in valuation allowance	-16.88%	-4.16%
Incentive stock options	-41.60%	-35.60%
Provision to return adjustments	24.11%	-1.80%
Meals and entertainment	-1.33%	-0.74%
Other Permanent differences	-4.37%	-0.60%
Income tax (expense)	-2.11%	-5.17%

Income_Taxes_Components_of_Inc

Income Taxes - Components of Income Tax Expense (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Current:
Federal	$14,071	$18,268
State		3,149
Deferred Federal	0	0
Deferred State	0	0
Income tax expense	$14,071	$21,417

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013
Income Taxes [Line Items]
Net Operating Loss Carry forwards	$28,700,000
Expiration Dates	2025
Research and Development Tax Credit	400,000
Research & development tax credit carryforwards expiration date	2024
U.S. Federal Statute Of Limitations Remains Open For Year	2005 and onward
Income Tax Examination Description	We currently have no federal income tax returns under examination. U.S. state jurisdictions have statutes of limitation generally ranging from three to seven years. We currently have no state income or franchise tax returns under examination. We currently do not file tax returns in any foreign tax jurisdiction.
Unrecognized Tax Benefits Net Increases Decreases Resulting From Current Period Tax Positions	0
Windfall Stock Compensation Deductions	$165,000
Minimum
Income Taxes [Line Items]
Income Tax Examination Statute Of Limitations Period	3 years
Maximum
Income Taxes [Line Items]
Income Tax Examination Statute Of Limitations Period	7 years

Stockholders_Equity_Additional

Stockholders' Equity - Additional Information (Detail) (USD $)	12 Months Ended		1 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Jan. 31, 2006	Apr. 30, 2003	Jan. 31, 2010	Dec. 31, 2011	Feb. 04, 2006
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Options outstanding (in shares)	5,279,229	5,422,130				4,641,039
Employee Vesting Period	5 years
Stock option expense	$1,200,000	$1,900,000
Weighted average grant date fair value of options granted (in dollars per share)	$1.29	$1.10
Stock-based compensation expense expected to recognize	1,600,000
Weighted average remaining service	1 year 8 months 12 days
2003 Stock Option Plan
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Stock option contractual term			10 years	10 years
Number of shares reserved for future issuance							9,715,000
Options outstanding (in shares)	945,472
2006 Equity Incentive Plan
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Number of shares available for issuance increases, percentage of outstanding common stock			10.00%
Potential number of shares available for issuance increases			1,695,690
Shares available for future grant	10,468,175	8,872,540
Description of shares available for issuance			The number of shares available for issuance increases by the lesser of (a) 10% of the outstanding shares of our common stock on the last day of the preceding fiscal year; (b) 1,695,690 shares; or (c) such other amount as our Board of Directors may determine.
Carilion Clinic
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Senior convertible Promissory Notes principal amount converted					5,000,000
Accrued interest converted					1,200,000
Percentage of Dividend Payable On Series A Convertible Preferred Stock					6.00%
Shares of common stock dividends	314,525
Conversion of stock description	Each share of Series A Convertible Preferred Stock may be converted into one share of our common stock at the option of the holder.
Conversion of stock, ratio		1
Warrant exercise price (in dollars per share)					2.5
Carilion Clinic | Series A Preferred Stock
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Preferred stock issued in exchange of notes payable, shares					1,321,514
Carilion Clinic | Maximum
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Preferred stock liquidation preference value					6,200,000
Hansen
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Issuance of Common Stock, Hansen Settlement (In shares)					1,247,330
Warrant exercise price (in dollars per share)					0.01
Common Stock Shares Outstanding Ownership Percentage					9.90%
Common stock issued upon exercise of warrant (in shares)	32,180	0
Warrant expense recognized	$0	$17,190

Stockholders_Equity_Activity_o

Stockholders' Equity - Activity of Stock Options (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Options Outstanding, Number of Shares
Beginning Balance (in shares)	5,422,130		4,641,039
Forfeited (in shares)	-693,644		-64,245
Exercised (in shares)	-137,097		-182,702
Granted (in shares)	687,840		1,028,038
Ending Balance (in shares)	5,279,229		5,422,130
Options Outstanding, Price per Share Range
Beginning Balance, lower limit (in dollars per share)	$0.35		$0.35
Beginning Balance, upper limit (in dollars per share)	$6.74		$6.74
Forfeited, lower limit (in dollars per share)	$0.35		$0.65
Forfeited, upper limit (in dollars per share)	$6.74		$5.50
Exercised, lower limit (in dollars per share)	$0.35		$0.35
Exercised, upper limit (in dollars per share)	$1.18		$1.77
Granted, lower limit (in dollars per share)	$1.20		$1.40
Granted, upper limit (in dollars per share)	$1.31		$1.75
Ending Balance, lower limit (in dollars per share)	$0.35		$0.35
Ending Balance, upper limit (in dollars per share)	$6.55		$6.74
Options Outstanding, Weighted Average Exercise Price
Beginning balance (in dollars per share)	$2.19		$2.23
Forfeited (in dollars per share)	$2.08		$1.91
Exercised (in dollars per share)	$0.56		$0.38
Granted (in dollars per share)	$1.29		$1.67
Ending balance (in dollars per share)	$2.11		$2.19
Options Outstanding, Aggregate Intrinsic Value beginning balance	$639,904	[1]	$1,509,270	[1]
Options Outstanding, Aggregate Intrinsic Value ending balance	784,154	[1]	639,904	[1]
Options Exercisable, Beginning Balance (in shares)	3,775,388		3,206,994
Options Exercisable, Ending Balance (in shares)	4,012,378		3,775,388
Options Exercisable, Weighted Average Exercise Price beginning balance (in dollars per share)	$2.37		$2.23
Options Exercisable, Weighted Average Exercise Price ending balance (in dollars per share)	$2.28		$2.37
Options Exercisable, Aggregate Intrinsic Value beginning balance	604,292		1,258,740
Options Exercisable, Aggregate Intrinsic Value ending balance	$697,826		$604,292
[1]	The intrinsic value of an option represents the amount by which the market value of the stock exceeds the exercise price of the option of in-money options only. The prices represent the closing price of our Common Stock on the NASDAQ Capital Market on the respective dates.

Stockholders_Equity_Activity_o1

Stockholders' Equity - Activity of Stock Option by Exercise Price Range (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, End of Period [Abstract]
Range of Exercise Prices, lower range (in dollars per share)	$0.35	$0.35
Range of Exercise Prices, upper range (in dollars per share)	$6.55	$6.74
Options outstanding (in shares)	5,279,229	5,422,130	4,641,039
Options Outstanding, Weighted Average Remaining Life in Years	5 years 10 months 17 days	6 years 4 months 21 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$2.11	$2.19	$2.23
Options Exercisable (in shares)	4,012,378	3,775,388	3,206,994
Weighted Average Exercise Price of Options Exercisable (in dollars per share)	$2.28	$2.37	$2.23
Total intrinsic value of options exercised	$111,595	$215,541
Total fair value of options vested	$1,248,067	$1,170,738

Commitment_and_Contingencies_A

Commitment and Contingencies - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2012
Commitments and Contingencies Disclosure [Line Items]
Sublease income		$266,000
Operating leases, expiration period		2 years
Non-cancelable purchase order commitment	1,400,000	1,400,000
Non-cancelable purchase order delivery period	18 months
Non-cancelable purchase order commitment remained	1,400,000	1,400,000
Minimum Royalty Payable	1,800,000	1,800,000
Selling, General and Administrative Expenses
Commitments and Contingencies Disclosure [Line Items]
Lease and rental expense		$1,000,000	$1,300,000

Commitment_and_Contingencies_F

Commitment and Contingencies - Future Minimum Rental Payments for Operating Leases (Detail) (USD $)	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]
2014	$1,014,131
2015	503,760
2016	299,635
2017	305,628
2018	311,740
Operating Leases, Future Minimum Payments Due, Total	$2,434,894

Employee_Profit_Sharing_Plan_A

Employee Profit Sharing Plan - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Compensation and Retirement Disclosure [Abstract]
Defined Contribution Plan Service Period For Eligibility	3 months
Percentage of employer's matching contributions to a defined contribution plan that vests	25.00%
Percentage of employees' gross pay for which employer contributes a matching contribution	10.00%
Contribution To Employee Compensation Plan by Employer	$175,000	$250,000

Recovered_Sheet1

Relationship With Major Customers - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Sales
Segment Reporting Disclosure [Line Items]
SCC group accounted percentage of revenue to total revenue		18.50%
United States Government | Sales
Segment Reporting Disclosure [Line Items]
SCC group accounted percentage of revenue to total revenue	64.00%	66.00%
United States Government | Accounts Receivable
Segment Reporting Disclosure [Line Items]
Percentage of Trade Receivables	25.00%	34.00%

Financial_Information_About_Se2

Financial Information About Segments - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2013
	Segment
Segment Reporting [Abstract]
Number of operating segments	2

Financial_Information_About_Se3

Financial Information About Segments - Information About Results of Operations for Each Segment (Detail) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Technology Development revenue	$2,858,000	$3,130,000	$2,807,000	$2,627,000	$3,598,000	$3,691,000	$3,895,000	$3,943,000	$11,421,868	$15,126,834
Products and Licensing revenue	1,841,000	1,569,000	2,024,000	1,478,000	1,986,000	2,021,000	1,993,000	2,338,000	6,911,707	8,338,967
Total revenue	4,699,000	4,699,000	4,831,000	4,105,000	5,584,000	5,712,000	5,888,000	6,281,000	18,333,575	23,465,801
Operating income (loss)	-2,753,000	-1,302,000	-1,739,000	-2,241,000	-1,322,000	-1,020,000	-922,000	-867,000	-8,035,310	-4,130,077
Depreciation									500,000	800,000
Amortization									400,000	300,000
Technology Development
Segment Reporting Information [Line Items]
Operating income (loss)									-3,169,605	-1,703,370
Depreciation									286,894	499,439
Amortization									197,765	212,790
Products and Licensing
Segment Reporting Information [Line Items]
Operating income (loss)									-4,865,705	-2,426,707
Depreciation									266,862	266,327
Amortization									$183,956	$113,471

Financial_Information_About_Se4

Financial Information About Segments - Segment Information (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$19,704,075	$20,457,768
Property plant and equipment, and intangible assets	2,060,709	2,426,638
Technology Development
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	10,208,433	13,342,725
Property plant and equipment, and intangible assets	1,217,083	1,868,235
Products and Licensing
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	9,495,642	7,115,043
Property plant and equipment, and intangible assets	$1,132,101	$996,242

Quarterly_Results_unaudited_Sc

Quarterly Results (unaudited) - Schedule of Quarterly Financial Information (Detail) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Revenues:
Technology	$2,858,000	$3,130,000	$2,807,000	$2,627,000	$3,598,000	$3,691,000	$3,895,000	$3,943,000	$11,421,868	$15,126,834
Products and licensing	1,841,000	1,569,000	2,024,000	1,478,000	1,986,000	2,021,000	1,993,000	2,338,000	6,911,707	8,338,967
Total revenues	4,699,000	4,699,000	4,831,000	4,105,000	5,584,000	5,712,000	5,888,000	6,281,000	18,333,575	23,465,801
Gross Margin	1,460,000	1,677,000	1,777,000	1,135,000	1,778,000	2,266,000	2,315,000	2,533,000	6,048,658	8,891,805
Operating loss	-2,753,000	-1,302,000	-1,739,000	-2,241,000	-1,322,000	-1,020,000	-922,000	-867,000	-8,035,310	-4,130,077
Net loss from continuing operations	-2,379,000	-775,000	-1,035,000	-1,319,000	-1,076,000	-759,000	-681,000	-712,000	-5,508,400	-3,227,824
Income/(loss) from discontinued operations net of income taxes	356,000	161,000	83,000	4,105,000	489,000	539,000	438,000	378,000	4,705,250	1,843,439
Net (loss)/income	-2,023,000	-614,000	-952,000	2,786,000	-587,000	-220,000	-243,000	-334,000	-803,150	-1,384,385
Net (loss)/income attributable to common stockholders	($2,049,000)	($640,000)	($978,000)	$2,762,000	($612,000)	($254,000)	($269,000)	($369,000)	($905,477)	($1,504,139)
Net loss per share from continuing operations:
Basic (in dollars per share)	($0.16)	($0.05)	($0.07)	($0.09)	($0.08)	($0.05)	($0.05)	($0.05)	($0.38)	($0.23)
Diluted (in dollars per share)	($0.16)	($0.05)	($0.07)	($0.09)	($0.08)	($0.05)	($0.05)	($0.05)	($0.38)	($0.23)
Net income/(loss) per share from discontinued operations:
Basic (in dollars per share)	$0.03	$0.01	$0.01	$0.29	$0.03	$0.04	$0.03	$0.03	$0.33	$0.13
Diluted (in dollars per share)	$0.03	$0.01	$0.01	$0.29	$0.03	$0.04	$0.03	$0.03	$0.33	$0.13
Net (loss)/income attributable to common stockholders:
Basic (in dollars per share)	($0.14)	($0.04)	($0.07)	$0.20	($0.04)	($0.02)	($0.02)	($0.03)	($0.06)	($0.11)
Diluted (in dollars per share)	($0.14)	($0.04)	($0.07)	$0.20	($0.04)	($0.02)	($0.02)	($0.03)	($0.06)	($0.11)
Weighted average shares:
Basic and Diluted	14,488,060	14,441,707	14,362,494	14,011,814	14,008,772	13,939,938	13,892,816	13,850,667	14,336,135	13,930,267

Discontinued_Operations_Additi

Discontinued Operations - Additional Information (Detail) (USD $)	1 Months Ended		3 Months Ended								12 Months Ended		0 Months Ended
	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Jan. 21, 2014	Feb. 28, 2013
		Employee				Employee
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale price of assets to affiliates		$6,100,000				$6,100,000							$30,000,000
Purchase price receivable on sale of SCC group	110,000	5,400,000	110,000			5,400,000					110,000
Additional purchase price received from escrow	475,000
Escrow deposits related to SCC group sales	125,000
Escrow release period	18 months
Transaction costs incurred related to SCC sales		900,000
Sublease income		400,000
Employee of SCC group transferred to purchaser		20				20
Current assets related to disposal group														200,000
Long-term assets related to disposal group														100,000
Group accounted percentage of cost of revenue accounted to revenue cost												20.70%
Gain on sale, net of income taxes											3,391,451
Net income per share from discontinued operations, diluted (in dollars per share)			$0.03	$0.01	$0.01	$0.29	$0.03	$0.04	$0.03	$0.03	$0.33	$0.13
Net revenues											5,909,375	8,883,202
Sales
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Group accounted percentage of revenue to total revenue												18.50%
Secure Computing and Communications Group (SCC)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net income per share from discontinued operations, diluted (in dollars per share)											$0.20
Net revenues											1,700,000
Medical Shape Sensing Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current assets related to disposal group	200,000		200,000								200,000
Long-term assets related to disposal group	200,000		200,000								200,000
Group accounted percentage of cost of revenue accounted to revenue cost											9.00%
Medical Shape Sensing Business | Sales
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Group accounted percentage of revenue to total revenue											12.00%
Subsequent Event | Medical Shape Sensing Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale price of assets to affiliates													30,000,000
Employee of SCC group transferred to purchaser													10
Cash consideration received at closing													6,000,000
Cash consideration received within 90 days of closing													6,000,000
Period after closing, which additional cash payments received													90 days
Cash consideration received in future tied to achievement of milestones and royalties													$18,000,000

Discontinued_Operations_Compon

Discontinued Operations - Components of (Loss) Income from Discontinued Operations (Detail) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Discontinued Operations and Disposal Groups [Abstract]
Net revenues									$5,909,375	$8,883,202
Cost of revenues									3,486,200	5,337,336
Operating expenses									229,745	574,446
Income/(loss) before income taxes									2,193,430	2,971,420
Allocated tax expense/(benefit)									879,819	1,127,981
Operating income/(loss) from discontinued operations									1,313,611	1,843,439
Gain on sale, net of $1.5 million of related income taxes									3,391,639	0
Income from discontinued operations, net of income taxes ($1.0 million and $2.4 million, respectively)	$356,000	$161,000	$83,000	$4,105,000	$489,000	$539,000	$438,000	$378,000	$4,705,250	$1,843,439

Discontinued_Operations_Compon1

Discontinued Operations - Components of (Loss) Income from Discontinued Operations (Parenthetical) (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Discontinued Operations and Disposal Groups [Abstract]
Income from discontinued operations, income taxes	$2.40	$1.10
Gain on sale, related income taxes	$1.50

Schedule_of_Valuation_and_Qual

Schedule of Valuation and Qualifying Accounts (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of Period	$86,186	$170,048
Charged to costs and expenses	134,811	0
Deductions	-11,435	-83,862
Valuation against asset	0	0
Balance at end of period	209,562	86,186
Inventory obsolescence
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of Period	86,186	147,676
Charged to costs and expenses	0	0
Deductions	-11,435	-61,490
Valuation against asset	0	0
Balance at end of period	74,751	86,186
Allowances for doubtful Accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of Period	0	22,372
Charged to costs and expenses	134,811	0
Deductions	0	-22,372
Valuation against asset	0	0
Balance at end of period	$134,811	$0