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Income Taxes - Deferred Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Deferred tax assets: |  |
Net operating loss carryforwards | $ 30,765 | $ 30,028
Capital loss carryforwards | 109 | 109
Inventory and other allowances | 31 | 34
Charitable contribution carryforwards | 5 | 3
Excess (tax) book depreciation | 492 | 361
Excess (tax) book amortization | 62 | 60
Share-based compensation | 1,253 | 1,159
Other accrued costs | 279 | 279
Total deferred tax assets | 32,996 | 32,033
Less: Valuation allowance | (32,996) | (32,033)
Deferred income taxes |  |

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