Debt (Details) - USD ($)					3 Months Ended		9 Months Ended
	Aug. 15, 2016	Apr. 29, 2016	Mar. 28, 2016	Apr. 17, 2015	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Jun. 15, 2016	Jan. 25, 2016	Dec. 31, 2015
Debt [Line Items]
Mark to market of SWK Warrant 2					$ 0	$ (74,000)	$ 59,000	$ (74,000)
Other income					$ 0	0	$ 887,000	0
Common stock, par value (in dollars per share)			$ 0.04		$ 0.04		$ 0.04		$ 0.04	$ 0.04	$ 0.04
2013 Loan and Security Agreement
Debt [Line Items]
Write-off of debt issuance costs					$ 0	$ 0	$ 282,000	$ 0
2013 Loan and Security Agreement | Interest Expense
Debt [Line Items]
Write-off of debt issuance costs					300,000
Loans payable
Debt [Line Items]
Amount of term loan					5,000,000		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 | 2013 Loan and Security Agreement | Loans payable | Transaction Cost
Debt [Line Items]
Debt extinguishment costs, early termination fees		140,000
Debt extinguishment cost, legal fees		30,000
Facility fee amount		107,000
Loans payable | Credit agreement
Debt [Line Items]
Facility fee amount				$ 100,000
Expected term				7 years
Deferred issuance costs, net					$ 391,000		391,000				163,000
Debt covenant, minimum aggregate revenue for twelve month period ending September 30, 2016	$ 34,000,000
Debt covenant, minimum aggregate revenue for twelve month period ending December 31, 2016	38,000,000
Debt covenant, minimum aggregate revenue for twelve month period ending each fiscal quarter thereafter	42,000,000
Debt covenant, minimum EBITDA amount for the nine month period ending September 30, 2016	2,000,000
Debt covenant, minimum EBITDA amount for the twelve month period ending December 31, 2016	500,000
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	300,000			$ 600,000
First principal payment							1,000,000
Interest paid							$ 400,000
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				$ 250,000.00
Number of shares to be purchased under warrant (in shares)				543,478
Exercise price of warrant (in dollars per share)					$ 1.30		$ 1.30
Term loan, fair value					$ 1,500,000		$ 1,500,000				$ 2,785,000
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]
Percent of aggregate revenue for quarterly payments				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]
Percent of aggregate revenue for quarterly payments				7.00%
Loans payable | Credit agreement | Annual Aggregate Revenue Greater Than $20 Million Up To And Including $30 Million | Minimum
Debt [Line Items]
Annual aggregate revenue limit				$ 20,000,000
Loans payable | Credit agreement | Annual Aggregate Revenue Greater Than $20 Million Up To And Including $30 Million | Maximum
Debt [Line Items]
Annual aggregate revenue limit				$ 30,000,000
Loans payable | Credit agreement | Annual Aggregate Revenue Greater Than $30 million
Debt [Line Items]
Percent of aggregate revenue for quarterly payments				5.00%
Annual aggregate revenue limit				$ 30,000,000
Loans payable | Credit agreement | Additional Paid-in Capital
Debt [Line Items]
Mark to market of SWK Warrant 2							$ 300,000
Loans payable | Credit agreement | LIBOR
Debt [Line Items]
Spread on variable rate (as percent)				14.00%			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]
Facility fee amount		140,000
Maximum borrowing capacity		$ 7,000,000
Expected term		3 years
Borrowings outstanding					4,800,000		$ 4,800,000
Available borrowing availability					1,100,000		1,100,000
Commitment fee, percentage (as percent)		0.50%
Collateral fee (as percent)		0.50%
Debt covenant, minimum aggregate revenue for twelve month period ending September 30, 2016	34,000,000
Debt covenant, minimum aggregate revenue for twelve month period ending December 31, 2016	38,000,000
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 nine month period ending September 30, 2016	2,000,000
Debt covenant, minimum EBITDA amount for the twelve month period ending December 31, 2016	500,000
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 fiscal quarter ended September 30, 2016
Debt [Line Items]
Minimum consolidated unencumbered liquid assets required	1
Line of credit | 2016 Credit and Security Agreement | Last day of fiscal quarter ended December 31, 2016
Debt [Line Items]
Minimum consolidated unencumbered liquid assets required	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					300,000		$ 300,000
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
Other income					$ 900,000
Line of credit | Credit agreement | Last day of fiscal quarter ended September 30, 2016
Debt [Line Items]
Minimum consolidated unencumbered liquid assets required	1
Line of credit | Credit agreement | Last day of fiscal quarter ended December 31, 2016
Debt [Line Items]
Minimum consolidated unencumbered liquid assets required	500,000
Line of credit | Credit agreement | Last day of any fiscal quarter thereafter
Debt [Line Items]
Minimum consolidated unencumbered liquid assets required	$ 750,000