Debt - Additional Information (Details)					3 Months Ended			6 Months Ended
	May 11, 2017 USD ($) lease guarantor $ / shares shares	May 10, 2017 USD ($)	Apr. 29, 2016 USD ($)	Apr. 17, 2015 USD ($) shares	Jun. 30, 2017 USD ($)	May 11, 2017 USD ($) lease guarantor $ / shares shares	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Aug. 10, 2017 USD ($)	May 12, 2017 USD ($) shares	Dec. 31, 2016 USD ($)	Apr. 30, 2015 $ / shares
Debt [Line Items]
Interest expense					$ 79,000		$ 62,000	$ 219,000	$ 123,000
Value of stock issued								364,000
Change in fair value					0		$ 0	0	59,000
Capital leases, short-term					300,000			300,000
Century
Debt [Line Items]
Change in fair value								152,000	$ 0
Provant
Debt [Line Items]
Line of credit	$ 4,684,000					$ 4,684,000
Number of capital leases | lease	2					2
2017 Public Offering Warrant | Provant
Debt [Line Items]
Warrants strike price (in dollars per share) | $ / shares						$ 1.35
Stocks issued (in shares) | shares						4,375,000
Value of stock issued						$ 3,400,000
Sale of stock, price per share (in dollars per share) | $ / shares	$ 0.80					$ 0.80
Number of shares to be purchased under warrant (in shares) | shares	2					2
A&R Warrant | Provant
Debt [Line Items]
Warrants strike price (in dollars per share) | $ / shares	$ 0.84
Value of stock issued	$ 1,300,000
Number of warrants to purchase shares issued (in shares) | shares											543,479
Term Loan
Debt [Line Items]
Amount of term loan					6,500,000			6,500,000				$ 5,000,000
Term Loan | 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
Term Loan | A&R Credit Agreement
Debt [Line Items]
Line of credit facility, maximum borrowing capacity		$ 3,700,000
Expected term				7 years
Debt Instrument, Fee Amount	97,500					$ 97,500
Legal fees	150,000					150,000
Deferred issuance costs, net					175,000			175,000				336,000
Amount of term loan	$ 3,700,000.0			$ 5,000,000	6,500,000.0	$ 3,700,000.0		6,500,000.0
Maximum quarterly principal payment				$ 500,000
Debt instrument, exit fee percentage	8.00%					8.00%
Debt exit fees	$ 400,000					$ 400,000
Interest expense					75,000
Volatility rate (as percent)				85.00%
Risk free interest rate (as percent)				1.40%
Dividend rate (as percent)				0.00%
Number of shares to be purchased under warrant (in shares) | shares				543,479
Term loan, fair value					586,000			586,000				1,122,000
Long-term debt					6,500,000			6,500,000				3,676,000
Term Loan | A&R Credit Agreement | LIBOR
Debt [Line Items]
Spread on variable rate (as percent)	12.50%
Term Loan | A&R Credit Agreement | Minimum | LIBOR
Debt [Line Items]
Spread on variable rate (as percent)	1.00%
Term Loan | A&R Credit Agreement | Annual Aggregate Revenue Up To And Including $20 million
Debt [Line Items]
Quarterly revenue-based payments as a percent of annual aggregate revenue (as percent)				15.00%
Annual aggregate revenue limit				$ 20,000,000
Term Loan | A&R Credit Agreement | Annual Aggregate Revenue Greater Than $20 million Up To And Including $30 million
Debt [Line Items]
Quarterly revenue-based payments as a percent of annual aggregate revenue (as percent)				10.00%
Annual aggregate revenue limit				$ 20,000,000
Term Loan | A&R Credit Agreement | Provant
Debt [Line Items]
Line of credit facility, maximum borrowing capacity	$ 6,500,000					6,500,000
Long-term debt	6,500,000					6,500,000
Term Loan | A&R 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
Volatility rate (as percent)				80.00%
Risk free interest rate (as percent)				2.10%
Dividend rate (as percent)				0.00%
Term loan, fair value				$ 3,600,000
Term Loan | A&R Credit Agreement | A&R Warrant
Debt [Line Items]
Exercise price of warrant (in dollars per share) | $ / shares													$ 1.30
Term Loan | A&R Credit Agreement | A&R Warrant | Additional Paid-in Capital
Debt [Line Items]
Change in fair value				300,000
Line of Credit | 2016 Credit and Security Agreement
Debt [Line Items]
Line of credit facility, maximum borrowing capacity		7,000,000.0
Expected term			3 years
Borrowings outstanding					4,500,000			4,500,000
Debt Instrument, Fee Amount			$ 100,000
Commitment fee, percentage (as percent)			0.50%
Collateral fee (as percent)			0.50%
Long-term debt					4,473,000			4,473,000				3,603,000
Line of Credit | 2016 Credit and Security Agreement | Subsequent event
Debt [Line Items]
Borrowings outstanding										$ 3,400,000
Available borrowing availability										$ 900,000
Line of Credit | 2016 Credit and Security Agreement | Prime rate
Debt [Line Items]
Spread on variable rate (as percent)			5.50%
Line of Credit | 2016 Credit and Security Agreement | Other Assets
Debt [Line Items]
Debt issuance costs, gross			$ 100,000
Deferred issuance costs, net					300,000			300,000
Line of Credit | 2016 Credit and Security Agreement | Provant
Debt [Line Items]
Line of credit facility, maximum borrowing capacity	10,000,000.0					10,000,000.0
Line of credit facility, capacity available during high-volume months	$ 15,000,000					$ 15,000,000
Line of Credit | A&R Credit Agreement
Debt [Line Items]
Cross-default provision on amount of debt outstanding				$ 250,000
Line of Credit | Seasonal Facility
Debt [Line Items]
Long-term debt					2,000,000			2,000,000				0
Line of Credit | Seasonal Facility | Provant | Guarantor Subsidiaries
Debt [Line Items]
Line of credit facility, maximum borrowing capacity											$ 2,000,000
Number of guarantors | guarantor	1					1
Interest payment amount as percentage of outstanding balance (as percent)	25.00%
Line of Credit | Seasonal Facility | 90% Contingent Warrant
Debt [Line Items]
Option indexed to issue shares (in shares) | shares	2,934,468					2,934,468
Warrants strike price (in dollars per share) | $ / shares	$ 0.6134
Exercisable period of warrants	7 years
Line of Credit | Seasonal Facility | 10% Warrant
Debt [Line Items]
Expected term	7 years
Option indexed to issue shares (in shares) | shares	326,052					326,052
Warrants strike price (in dollars per share) | $ / shares	$ 0.6134
Volatility rate (as percent)	80.60%
Risk free interest rate (as percent)	2.22%
Dividend rate (as percent)	0.00%
Line of Credit | Seasonal Facility | 2017 Public Offering Warrant
Debt [Line Items]
Option indexed to issue shares (in shares) | shares	2,187,500					2,187,500
Exercisable period of warrants	4 years
Line of Credit | Seasonal Facility | A&R Warrant
Debt [Line Items]
Expected term	7 years
Volatility rate (as percent)	80.60%
Risk free interest rate (as percent)	2.22%
Dividend rate (as percent)	0.00%
Exercisable period of warrants	7 years
Convertible Subordinated Debt | Subordinated Promissory Note | Century
Debt [Line Items]
Long-term debt		$ 2,500,000
Interest rate (as percent)		8.25%
Convertible Subordinated Debt | Subordinated Promissory Note | Provant
Debt [Line Items]
Amount converted to equity		$ 400,000
Subordinated Debt | Subordinated Promissory Note
Debt [Line Items]
Long-term debt					$ 2,092,000			$ 2,092,000				$ 0
Interest rate (as percent)		8.25%
Tax distribution interest accrual (as percent)		40.00%