Other Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Other Accrued Liabilities [Abstract]
Accrued warranty, current	$ 98	$ 102
Accrued compensation, including commissions and vacation	861	1,177
Accrued sales and other taxes	520	439
Distributor rights liability, current	82	0
Accrued professional fees and other accrued liabilities	338	274
Total other accrued liabilities	$ 1,899	$ 1,992