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Accrued Warranty (Details) - Changes in the Company’s product warranty reserve (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Changes in the Company’s product warranty reserve [Abstract]    
Balance at beginning of period $ 453 $ 665
Accrued warranty expense 363 317
Warranty claims paid (338) (400)
Translation adjustment 7 (43)
Balance at end of period $ 485 $ 539