Other Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Other Accrued Liabilities [Abstract]
Accrued warranty, current	$ 107	$ 102
Accrued compensation, including commissions and vacation	988	1,177
Accrued sales and other taxes	506	439
Distributor rights liability, current	285	0
Accrued professional fees and other accrued liabilities	274	274
Total other accrued liabilities	$ 2,160	$ 1,992