Debt - Additional Information (Details) - USD ($)				3 Months Ended
	Apr. 29, 2016	Mar. 28, 2016	Apr. 17, 2015	Mar. 31, 2017	Mar. 31, 2016	May 02, 2017	Dec. 31, 2016	Nov. 15, 2016	Jun. 15, 2016	Apr. 30, 2015
Debt [Line Items]
Mark to market of SWK Warrant 2 (defined below)				$ 0	$ 59,000
Common stock, par value (in dollars per share)				$ 0.04			$ 0.04		$ 0.04
Subsequent event
Debt [Line Items]
Common stock, par value (in dollars per share)						$ 0.04
Loans payable
Debt [Line Items]
Amount of term loan				$ 5,000,000			$ 5,000,000
Loans payable | 2013 Loan and Security Agreement | Contingently Issuable Warrant
Debt [Line Items]
Value of warrant to be issued is debt instrument is not paid	$ 1,250,000
Loans payable | Credit agreement
Debt [Line Items]
Expected term			7 years
Facility fee amount			$ 100,000
Deferred issuance costs, net				$ 226,000			336,000
Debt covenant, minimum aggregate revenue for twelve month period ending each fiscal quarter thereafter								$ 42,000,000
Debt covenant, minimum EBITDA amount for the twelve month period ending March 31, 2017								500,000
Debt covenant, minimum EBITDA amount for the twelve month period ending June 30, 2017								900,000
Debt covenant, minimum EBITDA amount for the twelve months ending each fiscal quarter thereafter								2,500,000
Amount of term loan			5,000,000
Maximum aggregate revenue-based payment			$ 600,000
Variable rate floor, percent			1.00%
Exit fee as a percent of aggregate principal			8.00%	8.00%	8.00%
Debt covenant, maximum debt outstanding			$ 250,000
Number of shares to be purchased under warrant (in shares)			543,479
Term loan, fair value				$ 755,000			$ 1,122,000
Expected volatility rate (as percent)			85.00%
Risk free interest rate (as percent)			1.40%
Dividend rate (as percent)			0.00%
Common stock, par value (in dollars per share)		$ 0.04
Value of stock issued		$ 100,000
Loans payable | Credit agreement | Annual Aggregate Revenue Up To And Including $20 million
Debt [Line Items]
Debt Instrument, Quarterly Revenue-Based Payments As A Percent Of Annual Aggregate Revenue			8.50%
Annual aggregate revenue limit			$ 20,000,000
Loans payable | Credit agreement | Annual Aggregate Revenue Greater Than $20 million Up To And Including $30 million
Debt [Line Items]
Debt Instrument, Quarterly Revenue-Based Payments As A Percent Of Annual Aggregate Revenue			7.00%
Annual aggregate revenue limit			$ 20,000,000
Loans payable | Credit agreement | Annual Aggregate Revenue Greater Than $30 million
Debt [Line Items]
Debt Instrument, Quarterly Revenue-Based Payments As A Percent Of Annual Aggregate Revenue			5.00%
Annual aggregate revenue limit			$ 30,000,000
Loans payable | Credit agreement | LIBOR
Debt [Line Items]
Spread on variable rate (as percent)			14.00%
Loans payable | Credit agreement | Contingently Issuable Warrant
Debt [Line Items]
Value of warrant to be issued is debt instrument is not paid			$ 1,250,000
Expected term			7 years
Term loan, fair value			$ 3,600,000
Expected volatility rate (as percent)			80.00%
Risk free interest rate (as percent)			2.10%
Dividend rate (as percent)			0.00%
Line of credit | 2016 Credit and Security Agreement
Debt [Line Items]
Maximum borrowing capacity	$ 7,000,000
Expected term	3 years
Borrowings outstanding				4,000,000
Available borrowing availability				200,000
Facility fee amount	$ 100,000
Commitment fee, percentage (as percent)	0.50%
Collateral fee (as percent)	0.50%
Debt covenant, minimum aggregate revenue for twelve month period ending March 31, 2017								41,000,000
Debt covenant, minimum aggregate revenue for twelve month period ending each fiscal quarter thereafter								42,000,000
Debt covenant, minimum EBITDA amount for the twelve month period ending March 31, 2017								500,000
Debt covenant, minimum EBITDA amount for the twelve month period ending June 30, 2017								900,000
Debt covenant, minimum EBITDA amount for the twelve months ending each fiscal quarter thereafter								2,500,000
Line of credit | 2016 Credit and Security Agreement | Last day of any fiscal quarter thereafter
Debt [Line Items]
Minimum consolidated unencumbered liquid assets required								750,000
Line of credit | 2016 Credit and Security Agreement | Other Assets
Debt [Line Items]
Deferred issuance costs, net				$ 200,000
Line of credit | 2016 Credit and Security Agreement | Prime rate
Debt [Line Items]
Spread on variable rate (as percent)	5.50%
Line of credit | Credit agreement
Debt [Line Items]
Debt covenant, minimum aggregate revenue for twelve month period ending March 31, 2017								41,000,000
Line of credit | Credit agreement | Last day of any fiscal quarter thereafter
Debt [Line Items]
Minimum consolidated unencumbered liquid assets required								$ 750,000
Warrant One | Loans payable | Credit agreement
Debt [Line Items]
Exercise price of warrant (in dollars per share)										$ 1.30
Warrant One | Loans payable | Credit agreement | Additional Paid-in Capital
Debt [Line Items]
Mark to market of SWK Warrant 2 (defined below)			$ 300,000