Accrued Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Payables and Accruals [Abstract]
Accrued payroll and related costs	$ 978	$ 2,119
Warranty reserve	107	120
Accrued taxes	0	318
Other accrued liabilities	390	328
Accrued liabilities	$ 1,475	$ 2,885