Accrued Liabilities (Details) - Accrued liabilities - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accrued liabilities [Abstract]
Deferred revenues	$ 915	$ 931
Directors fees	844	684
Current portion of pension liability (see Note 14)	660	1,010
Compensation and employee benefits	590	614
Accrued manufacturing equipment cost	590
Taxes payable	583	1,059
Interest payable	408	522
Warranty reserve	303	389
Audit fees	135	137
Other	772	790
Accrued Liabilities, Total	$ 5,800	$ 6,136