Other Accrued Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Other Accrued Liabilities [Abstract]
Accrued warranty, current, see Note 1	$ 155	$ 168
Accrued compensation, including commissions and vacation	921	1,336
Accrued sales and other taxes	375	349
Accrued professional fees	175	265
Other accrued liabilities	13	43
Total other accrued liabilities	$ 1,639	$ 2,161