Liquidity (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended		6 Months Ended
	Mar. 28, 2016	Jan. 25, 2016	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Aug. 09, 2016	Jun. 15, 2016	Dec. 31, 2015	Apr. 17, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Stock issued (in shares)	666,667	2,601,789
Common stock, par value (in dollars per share)	$ 0.04	$ 0.04	$ 0.04		$ 0.04			$ 0.04	$ 0.04
Issuance of common stock, net of issuance costs	$ 1,200	$ 3,400			$ 4,574	$ 0
Cash and cash equivalents			$ 102	$ 1,242	102	1,242			$ 2,035		$ 5,201
Loss from continuing operations			(2,309)	$ (3,342)	(5,578)	(5,444)
Net cash used in operating activities of continuing operations					4,848	$ 5,099
AHS acquisition
Debt Instrument [Line Items]
Common stock, par value (in dollars per share)										$ 0.04
Selling, general and administrative expenses | AHS acquisition
Debt Instrument [Line Items]
Integration costs					100
Line of credit | 2016 Credit and Security Agreement
Debt Instrument [Line Items]
Borrowings outstanding			3,300		3,300
Available borrowing availability			300		300
Line of credit | 2016 Credit and Security Agreement | Subsequent event
Debt Instrument [Line Items]
Borrowings outstanding							$ 2,400
Available borrowing availability							$ 800
Loans payable | Credit agreement
Debt Instrument [Line Items]
Common stock, par value (in dollars per share)	$ 0.04
Outstanding borrowings under term loan			$ 4,000		$ 4,000