Basis of Presentation - Restatement (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	May 11, 2017	Mar. 31, 2017	Dec. 31, 2016
CONDENSED CONSOLIDATED BALANCE SHEET:
Property, plant and equipment	$ 9,668		$ 9,668				$ 8,460
Total assets	31,788		31,788				14,254
Current liabilities:
Accrued expenses	5,272		5,272				1,747
Total current liabilities	24,313		24,313				16,801
Stockholders' deficit:
Accumulated deficit	(178,364)		(178,364)				(169,352)
Total stockholders' deficit	(631)		(631)				(2,864)
Total liabilities and stockholders' deficit	31,788		31,788				$ 14,254
CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS:
Selling, general and administrative expenses	5,281	$ 3,724	8,760	$ 7,551
Transaction costs	1,595	221	2,277	329
Operating loss from continuing operations	(5,199)	(2,180)	(7,668)	(4,655)
Loss from continuing operations before taxes	(5,892)	(2,304)	(9,129)	(5,568)
Loss from continuing operations	(5,904)	(2,309)	(9,146)	(5,578)
Net loss	$ (5,883)	(2,459)	$ (9,012)	(5,887)
Loss from continuing operations per common share: basic and diluted (in dollars per share)	$ (0.28)		$ (0.57)
Net loss per common share: basic and diluted (in dollars per share)	$ (0.28)		$ (0.56)
CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS:
Net loss	$ (5,883)	$ (2,459)	$ (9,012)	(5,887)
Accounts payable, accrued expenses and other liabilities			(1,335)	(1,365)
Net cash used in operating activities			(6,681)	(4,848)
Capital expenditures			(130)	(191)
Net cash provided by investing activities			1,806	$ (191)
Previously Reported
CONDENSED CONSOLIDATED BALANCE SHEET:
Property, plant and equipment	9,774		9,774
Total assets	31,894		31,894
Current liabilities:
Accrued expenses	4,772		4,772
Total current liabilities	23,813		23,813
Stockholders' deficit:
Accumulated deficit	(177,758)		(177,758)
Total stockholders' deficit	(25)		(25)
Total liabilities and stockholders' deficit	31,894		31,894
CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS:
Selling, general and administrative expenses	5,175		8,654
Transaction costs	1,095		1,777
Operating loss from continuing operations	(4,593)		(7,062)
Loss from continuing operations before taxes	(5,286)		(8,523)
Loss from continuing operations	(5,298)		(8,540)
Net loss	$ (5,277)		$ (8,406)
Loss from continuing operations per common share: basic and diluted (in dollars per share)	$ (0.25)		$ (0.53)
Net loss per common share: basic and diluted (in dollars per share)	$ (0.25)		$ (0.52)
CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS:
Net loss	$ (5,277)		$ (8,406)
Accounts payable, accrued expenses and other liabilities			(1,835)
Net cash used in operating activities			(6,575)
Capital expenditures			(236)
Net cash provided by investing activities			1,700
Adjustment
CONDENSED CONSOLIDATED BALANCE SHEET:
Property, plant and equipment	(106)		(106)
Total assets	(106)		(106)
Current liabilities:
Accrued expenses	500		500
Total current liabilities	500		500
Stockholders' deficit:
Accumulated deficit	(606)		(606)
Total stockholders' deficit	(606)		(606)
Total liabilities and stockholders' deficit	(106)		(106)
CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS:
Selling, general and administrative expenses	106		106
Transaction costs	500		500
Operating loss from continuing operations	(606)		(606)
Loss from continuing operations before taxes	(606)		(606)
Loss from continuing operations	(606)		(606)
Net loss	$ (606)		$ (606)
Loss from continuing operations per common share: basic and diluted (in dollars per share)	$ (0.03)		$ (0.04)
Net loss per common share: basic and diluted (in dollars per share)	$ (0.03)		$ (0.04)
CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS:
Net loss	$ (606)		$ (606)
Accounts payable, accrued expenses and other liabilities			500
Net cash used in operating activities			(106)
Capital expenditures			106
Net cash provided by investing activities			106
Provant
CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS:
Transaction costs	$ 1,600		2,300
Provant | Adjustment
Current liabilities:
Accrued expenses					$ 500	$ 250
CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS:
Selling, general and administrative expenses			100
Transaction costs			$ 500