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INCOME TAXES - Significant components of deferred tax assets and liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Deferred tax assets:    
Warranty costs $ 1,211 $ 895
Sales incentives and discounts 542 942
Stock-based compensation 938 838
Pension 1,919 2,212
All others 268 331
State credits and NOL's 4,634 4,450
Valuation allowance (4,359) (4,155)
Total deferred tax assets 5,153 5,513
Deferred tax liabilities:    
Depreciation and amortization expense (880) (699)
Net deferred tax assets $ 4,273 $ 4,814