v2.4.0.8
Accrued Warranty Expense (Detail) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Warranty Liability [Line Items]    
Accrued warranty beginning balance $ 737 $ 690
Warranty costs incurred (501) (571)
Provision for warranty expense 419 550
Accrued warranty ending balance $ 655 $ 669