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Income Taxes - Additional Information (Detail) (USD $) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2013 | Dec. 31, 2011
Operating Loss Carryforwards [Line Items] |  |  |  |
Excess tax benefits from employee restricted stock included in net operating loss carryforwards | $ 500,000 |  |  |
AMT credit carryforwards | 500,000 |  |  |
Tax credit carryforwards, Expire year | 2027 |  |  |
Valuation allowance |  |  |  | 53,200,000
Interest and penalties | 3,000 | 38,000 |  |
Cumulative interest and penalties | 41,000 | 38,000 |  |
Unrecognized tax benefits | 592,000 | 592,000 | 200,000 | 324,000
Tax year under income tax examination | 2011 |  |  |
Federal [Member] |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Net operating loss carryforwards | 84,400,000 |  |  |
Net operating loss carryforwards, expiry terms, federal taxes | Federal net operating loss carryforwards will expire from 2024 through 2033 |  |  |
Tax credit carryforwards | 3,400,000 |  |  |
Federal income tax returns subject to examination description | Federal income tax returns of the Company are subject to IRS examination for the 2012 tax year. |  |  |
State [Member] |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Net operating loss carryforwards | 150,000,000 |  |  |
Net operating loss carryforwards, expiry terms, federal taxes | State net operating loss carryforwards will expire 2014 through 2033 |  |  |
Tax credit carryforwards | $ 700,000 |  |  |
Federal income tax returns subject to examination description | State income tax returns are subject to examination for a period of three to four years after filing. |  |  |

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