Accrued Liabilities (Details) - Accrued liabilities (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Accrued liabilities [Abstract]
Deferred revenues	$ 1,704	$ 1,811
Current portion of pension liability (see Note 16)	1,445	1,152
Compensation and employee benefits	1,104	1,051
Taxes payable	760	730
Legal fees payable	607	238
Interest payable	329	294
Warranty obligations	281	274	291
Restructuring costs	205	73
Other	1,342	1,066
Accrued Liabilities, Total	$ 7,777	$ 6,689