Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Payables and Accruals [Abstract]
Accrued payroll and related costs	$ 1,740	$ 1,463
Warranty reserve	132	143
Restructuring charges	185	701
Accrued taxes	7	33
Other accrued liabilities	394	504
Accrued liabilities	$ 2,458	$ 2,844