XML 18 R25.htm IDEA: XBRL DOCUMENT v2.4.0.8
Business Description, Basis of Presentation and Significant Accounting Policies Summary of Significant Accounting Policies - Warranties (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Movement in Standard Product Warranty Accrual [Roll Forward]    
Balance at the beginning of year $ 338 $ 385
Warranty accruals/additions 94 433
Warranty usage (106) (480)
Balance at end of period $ 326 $ 338