Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Payables and Accruals [Abstract]
Payroll and related	$ 6,514	$ 6,187
Professional fees	1,284	1,278
Non-income taxes	483	601
Product warranty	593	616	$ 578	$ 1,006
Deferred rent	0	160
Other	1,098	1,715
Total accrued liabilities	$ 9,972	$ 10,557