Liquidity (Details) - USD ($)			3 Months Ended
	Mar. 28, 2016	Feb. 25, 2016	Mar. 31, 2016	Mar. 31, 2015	May. 11, 2016	Jan. 25, 2016	Dec. 31, 2015	Apr. 17, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Common stock, value	$ 1,200,000					$ 3,500,000
Stock issued (in shares)	10,000,000
Common stock, par value (in dollars per share)	$ 0.04		$ 0.04				$ 0.04
Cash and cash equivalents			$ 2,031,000	$ 1,387,000			$ 2,035,000		$ 5,201,000
Loss from continuing operations			(3,269,000)	(2,103,000)
Net cash used in operating activities of continuing operations			3,390,000	$ 3,601,000
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			100,000
Loans payable
Debt Instrument [Line Items]
Amount of term loan			5,000,000
Loans payable | Credit agreement
Debt Instrument [Line Items]
Stock issued (in shares)		454,545
Common stock, par value (in dollars per share)	$ 0.04	$ 0.04
Value of warrant to be issued is debt instrument is not paid			1,250,000
Amount of term loan								$ 5,000,000
Outstanding borrowings under term loan			4,500,000
Line of credit | 2013 Loan and Security Agreement
Debt Instrument [Line Items]
Borrowings outstanding			2,600,000
Available borrowing availability			$ 300,000
Line of credit | 2013 Loan and Security Agreement | Subsequent event
Debt Instrument [Line Items]
Borrowings outstanding					$ 3,100,000
Available borrowing availability					$ 1,100,000