Debt - Additional Information (Details)							1 Months Ended		3 Months Ended	4 Months Ended
	Mar. 15, 2018 USD ($)	Aug. 08, 2017 USD ($) $ / shares shares	May 11, 2017 USD ($) lease guarantor $ / shares shares	May 10, 2017 USD ($)	Apr. 29, 2016 USD ($)	Apr. 17, 2015 USD ($) shares	Apr. 30, 2018 USD ($)	Mar. 31, 2018 USD ($) credit_facility	Mar. 31, 2018 USD ($) credit_facility	May 24, 2017 USD ($) $ / shares shares	Dec. 31, 2017 USD ($)	May 12, 2017 USD ($)	Nov. 15, 2016 USD ($)	Aug. 15, 2016 $ / shares
Debt [Line Items]
Number of primary credit facilities | credit_facility								2	2
Long-term debt								$ 13,979,000	$ 13,979,000		$ 19,314,000
Number of overdraft credit facilities | credit_facility								2	2
Value of stock issued									$ 23,000
Capital Leases								$ 45,000	45,000		107,000
Short-term Debt
Debt [Line Items]
Capital Leases								100,000	100,000
Provant
Debt [Line Items]
Business combinations, line of credit								4,684,000	4,684,000
Subordinated promissory note								1,917,000	1,917,000
Number of capital leases | lease			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
Number of shares to be purchased under warrant (in shares) | shares			2
A&R Warrant | Provant
Debt [Line Items]
Warrants strike price (in dollars per share) | $ / shares			$ 0.84
Stocks issued (in shares) | shares			1,300,000
2017 August Term Loan | Line of Credit | Provant
Debt [Line Items]
Line of credit facility, maximum borrowing capacity								2,000,000	2,000,000
Line of Credit | Seasonal Facility | Provant | Guarantor Subsidiaries
Debt [Line Items]
Line of credit facility, maximum borrowing capacity								2,000,000.0	2,000,000.0			$ 2,000,000.0
Number of guarantors | guarantor			1
Interest payment amount as percentage of outstanding balance (as percent)			25.00%
Line of Credit | Seasonal Facility | 10% Warrant
Debt [Line Items]
Option indexed to issue shares (in shares) | shares			326,052
Warrants strike price (in dollars per share) | $ / shares			$ 0.6134
Line of Credit | Seasonal Facility | 90% Contingent Warrant
Debt [Line Items]
Option indexed to issue shares (in shares) | shares			2,934,468
Warrants strike price (in dollars per share) | $ / shares			$ 0.6134
Exercisable period of warrants			7 years
Line of Credit | Seasonal Facility | Century Warrants
Debt [Line Items]
Expected term			7 years
Volatility rate			80.60%
Risk free interest rate			2.22%
Dividend rate			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
Exercisable period of warrants			4 years
Line of Credit | Seasonal Facility | A&R Warrant
Debt [Line Items]
Volatility rate			80.60%
Risk free interest rate			2.22%
Dividend rate			0.00%
Line of Credit | 2016 Credit and Security Agreement
Debt [Line Items]
Long-term debt								4,887,000	4,887,000		10,015,000
Line of credit facility, maximum borrowing capacity				$ 7,000,000
Expected term					3 years
Borrowings outstanding								4,900,000	4,900,000
Available borrowing capacity								200,000	200,000
Debt instrument, fee amount					$ 100,000
Commitment fee, percentage (as percent)					0.50%
Collateral fee (as percent)					0.50%
Line of Credit | 2016 Credit and Security Agreement | Prime rate
Debt [Line Items]
Spread on variable rate (as percent)					4.50%
Line of Credit | 2016 Credit and Security Agreement | Other Assets
Debt [Line Items]
Debt issuance costs, gross					$ 100,000
Deferred issuance costs, net								200,000	200,000
Line of Credit | 2016 Credit and Security Agreement | Subsequent Event
Debt [Line Items]
Borrowings outstanding							$ 5,600,000
Available borrowing capacity							300,000
Line of Credit | 2016 Credit and Security Agreement | Provant
Debt [Line Items]
Line of credit facility, maximum borrowing capacity			$ 10,000,000
Line of credit facility, capacity available during high-volume months			15,000,000
Line of Credit | Term Loans
Debt [Line Items]
Cross-default provision on amount of debt outstanding						$ 250,000
Term Loans
Debt [Line Items]
Deb face amount								8,250,000	8,250,000		8,500,000
Term Loans | 2017 August Term Loan
Debt [Line Items]
Long-term debt		$ 2,000,000						1,800,000	1,800,000
Debt instrument, fee amount		30,000
Debt balance in default								250,000
Term Loans | 2017 August Term Loan | Payment by November 30, 2017
Debt [Line Items]
Debt exit fees		140,000
Term Loans | 2017 August Term Loan | Payment after November 30, 2017
Debt [Line Items]
Debt exit fees		$ 280,000
Term Loans | 2017 August Term Loan | Subsequent Event
Debt [Line Items]
Debt balance in default							250,000
Term Loans | 2017 August Term Loan | Warrant 1
Debt [Line Items]
Expected term		7 years
Term Loans | 2017 August Term Loan | August Warrant
Debt [Line Items]
Exercise price of warrant (in dollars per share) | $ / shares		$ 0.80
Volatility rate		79.30%
Risk free interest rate		2.10%
Dividend rate		0.00%
Fair value of warrants		$ 200,000
Number of warrants to purchase shares issued (in shares) | shares		450,000
Term Loans | 2013 Loan and Security Agreement | Warrant 2
Debt [Line Items]
Value of warrant to be issued is debt instrument is not paid					$ 1,250,000
Term Loans | Term Loans
Debt [Line Items]
Long-term debt								8,250,000	8,250,000		8,500,000
Line of credit facility, maximum borrowing capacity				3,700,000
Debt instrument, fee amount											97,500
Deferred issuance costs, net								207,000	207,000		220,000
Deb face amount													$ 5,000,000
Maximum quarterly principal payment			$ 500,000
Debt instrument, exit fee percentage			8.00%
Legal fees											150,000
Debt exit fees			$ 400,000
Term loan, fair value								555,000	555,000		631,000
Debt balance in default	$ 250,000							250,000
Term Loans | Term Loans | LIBOR
Debt [Line Items]
Spread on variable rate (as percent)			12.50%
Term Loans | Term Loans | Minimum | LIBOR
Debt [Line Items]
Spread on variable rate (as percent)			1.00%
Term Loans | Term Loans | 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%
Term Loans | Term Loans | Annual Aggregate Revenue Greater greater than $20 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						20,000,000
Term Loans | Term Loans | Subsequent Event
Debt [Line Items]
Debt balance in default							$ 250,000
Term Loans | Term Loans | Provant
Debt [Line Items]
Long-term debt		$ 6,500,000	8,500,000					6,500,000	6,500,000
Line of credit facility, maximum borrowing capacity			$ 6,500,000
Term Loans | Term Loans | Warrant 2
Debt [Line Items]
Value of warrant to be issued is debt instrument is not paid						$ 1,250,000
Expected term						7 years
Volatility rate						80.00%
Risk free interest rate						2.10%
Dividend rate						0.00%
Term Loans | Term Loans | Warrant 1
Debt [Line Items]
Expected term						7 years
Exercise price of warrant (in dollars per share) | $ / shares														$ 1.30
Volatility rate						85.00%
Risk free interest rate						1.40%
Dividend rate						0.00%
Number of shares to be purchased under warrant (in shares) | shares						543,479
Term Loans | Term Loans | Warrant 1 | Additional Paid-in Capital
Debt [Line Items]
Fair value of warrants						$ 300,000
Term Loans | Term Loans | Warrants 1 and 2
Debt [Line Items]
Term loan, fair value						$ 3,600,000
Term Loans | Term Loans | A&R Warrant
Debt [Line Items]
Expected term						7 years
Exercisable period of warrants						7 years
Convertible Subordinated Debt | Promissory Note | Century
Debt [Line Items]
Long-term debt				$ 2,500,000
Interest rate				8.25%
Convertible Subordinated Debt | Promissory Note | Provant
Debt [Line Items]
Amount converted to equity				$ 400,000
Subordinated Debt | Promissory Note
Debt [Line Items]
Long-term debt								$ 1,559,000	$ 1,559,000		$ 1,543,000
Interest rate				8.25%
Tax distribution interest accrual rate				40.00%