Other Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Other Accrued Liabilities [Abstract]
Accrued warranty, current, see Note 1	$ 102	$ 168
Accrued compensation, including commissions and vacation	1,177	1,336
Accrued sales and other taxes	439	349
Accrued professional fees and other accrued liabilities	274	308
Total other accrued liabilities	$ 1,992	$ 2,161