Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Payables and Accruals [Abstract]
Accrued payroll and related costs	$ 1,283	$ 2,119
Warranty reserve	116	120
Accrued taxes	0	318
Other accrued liabilities	428	328
Accrued liabilities	$ 1,827	$ 2,885