Debt (Details) - USD ($)				3 Months Ended		6 Months Ended
	Apr. 29, 2016	Mar. 28, 2016	Apr. 17, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Aug. 09, 2016	Jun. 15, 2016	Mar. 31, 2016	Jan. 25, 2016	Dec. 31, 2015
Loan and Security Agreements [Line Items]
Write-off of debt issuance costs						$ 282,000	$ 0
Common stock, par value (in dollars per share)		$ 0.04		$ 0.04		$ 0.04			$ 0.04		$ 0.04	$ 0.04
Stock issued						$ 4,723,000
Number of shares to be purchased under warrant (in shares)				543,478		543,478
Other Operating Income				$ 887,000	$ 0	$ 887,000	0
2013 Loan and Security Agreement
Loan and Security Agreements [Line Items]
Write-off of debt issuance costs				282,000	$ 0	282,000	$ 0
2013 Loan and Security Agreement | Interest Expense
Loan and Security Agreements [Line Items]
Write-off of debt issuance costs				300,000
Loans payable
Loan and Security Agreements [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
Loan and Security Agreements [Line Items]
Value of warrant to be issued is debt instrument is not paid										$ 1,250,000
Loans payable | 2013 Loan and Security Agreement | Transaction Cost
Loan and Security Agreements [Line Items]
Debt extinguishment costs, early termination fees	$ 140,000
Loans payable | Credit agreement
Loan and Security Agreements [Line Items]
Facility fee amount			$ 100,000
Expected term			7 years
Deferred issuance costs, net				$ 204,000		204,000						163,000
Debt covenant, minimum aggregate revenue for twelve month period ending June 30, 2016		$ 34,000,000
Debt covenant, minimum aggregate revenue for twelve month period ending September 30, 2016		37,000,000
Debt covenant, minimum aggregate revenue for twelve month period ending December 31, 2016		40,000,000
Debt covenant, minimum aggregate revenue for twelve month period ending each fiscal quarter thereafter		45,000,000
Debt covenant, minimum EBITDA amount for the three month period ending June 30, 2016		2,000,000
Debt covenant, minimum EBITDA amount for the six month period ending September 30, 2016		1,100,000
Debt covenant, minimum EBITDA amount for the nine month period ending December 31, 2016		800,000
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 month period ending September 30, 2017		2,500,000
Amount of term loan			$ 5,000,000
Maximum aggregate revenue-based payment			$ 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, additional equity required (not less than)		$ 500,000.0
Common stock, par value (in dollars per share)		$ 0.04
Stock issued		$ 100,000
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)			$ 6.90
Term loan, fair value				$ 1,977,000		$ 1,977,000						$ 2,785,000
Expected volatility rate (as percent)			85.00%
Risk free interest rate (as percent)			1.40%
Dividend rate (as percent)			0.00%
Loans payable | Credit agreement | Annual Aggregate Revenue Up To And Including $20 million
Loan and Security Agreements [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
Loan and Security Agreements [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
Loan and Security Agreements [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
Loan and Security Agreements [Line Items]
Annual aggregate revenue limit			$ 30,000,000
Loans payable | Credit agreement | Annual Aggregate Revenue Greater Than $30 million
Loan and Security Agreements [Line Items]
Percent of aggregate revenue for quarterly payments			5.00%
Annual aggregate revenue limit			$ 30,000,000
Loans payable | Credit agreement | LIBOR
Loan and Security Agreements [Line Items]
Spread on variable rate (as percent)			14.00%			14.00%
Loans payable | Credit agreement | Contingently Issuable Warrant
Loan and Security Agreements [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 | 2013 Loan and Security Agreement | Transaction Cost
Loan and Security Agreements [Line Items]
Debt extinguishment cost, legal fees	30,000
Facility fee amount	107,000
Line of credit | 2016 Credit and Security Agreement
Loan and Security Agreements [Line Items]
Facility fee amount	140,000
Maximum borrowing capacity	$ 7,000,000
Expected term			3 years
Borrowings outstanding				3,300,000		$ 3,300,000
Available borrowing availability				300,000		300,000
Commitment fee, percentage (as percent)	0.50%
Collateral fee (as percent)	0.50%
Debt covenant, minimum aggregate revenue for twelve month period ending June 30, 2016	$ 34,000,000
Debt covenant, minimum aggregate revenue for twelve month period ending September 30, 2016	37,000,000
Debt covenant, minimum aggregate revenue for twelve month period ending December 31, 2016	40,000,000
Debt covenant, minimum aggregate revenue for twelve month period ending each fiscal quarter thereafter	45,000,000
Debt covenant, minimum EBITDA amount for the three month period ending June 30, 2016	(2,000,000)
Debt covenant, minimum EBITDA amount for the six month period ending September 30, 2016	(1,100,000)
Debt covenant, minimum EBITDA amount for the nine month period ending December 31, 2016	800,000
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 month period ending September 30, 2017	2,500,000
Amount of consolidated unencumbered liquid assets required (not less than)	$ 750,000
Other Operating Income				900,000
Line of credit | 2016 Credit and Security Agreement | Other Assets
Loan and Security Agreements [Line Items]
Deferred issuance costs, net				$ 300,000		$ 300,000
Line of credit | 2016 Credit and Security Agreement | Prime rate
Loan and Security Agreements [Line Items]
Spread on variable rate (as percent)	5.50%
Line of credit | 2016 Credit and Security Agreement | Subsequent event
Loan and Security Agreements [Line Items]
Borrowings outstanding								$ 2,400,000
Available borrowing availability								$ 800,000