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Income Taxes (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Deferred tax assets: |  |
Deferred Tax Assets, Deferred Gain on Sale Leaseback Transaction | $ 2,387 | $ 0
Inventory valuation reserves | 379 | 699
Allowance for doubtful accounts | 29 | 61
Inventory capitalization | 1,781 | 1,692
Environmental reserves | 199 | 175
Interest rate swap | 15 | 41
Warranty accrual | 62 | 88
Deferred compensation | 61 | 64
Accrued bonus | 337 | 338
Accrued expenses | 78 | 1,403
State net operating loss carryforwards | 1,725 | 1,616
Other | 389 | 423
Total deferred tax assets | 7,442 | 6,600
Deferred Tax Assets, Valuation Allowance | (1,790) | (1,694)
Deferred Tax Assets, Net of Valuation Allowance | 5,652 | 4,906
Valuation allowance |  |
Tax over book depreciation and amortization | 6,947 | 7,609
Prepaid expenses | 211 | 312
Other | 103 | 2
Total deferred tax liabilities | 7,261 | 7,923
Deferred Tax Liabilities, Net | $ (1,609) | $ (3,017)

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