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Income Taxes - Additional Information (Detail) (USD $) | 9 Months Ended
--- | ---
Sep. 30, 2013 | Sep. 30, 2012
Income Taxes [Line Items] |  |
Income tax net operating loss carryforwards | $ 117,000,000 |
Net operating loss carryforwards related to foreign income tax | 11,000,000 |
Alternative Minimum Tax Rate | 20.00% |
Net operating loss carryforwards utilized | 16,000,000 |
Net deferred tax asset | 0 |
Dividend from subsidiaries | 16,000,000 |
Federal income tax rate | 34.00% | 34.00%
Tax benefits and (liabilities), prior to any valuation allowances, related to stock option plans | 214,670 | 249,423
End [Member] |  |
Income Taxes [Line Items] |  |
Net operating loss carryforwards expiration year | 2032 |
Start [Member] |  |
Income Taxes [Line Items] |  |
Net operating loss carryforwards expiration year | 2018 |
2018 Through 2022 [Member] |  |
Income Taxes [Line Items] |  |
Income tax net operating loss carryforwards | 3,200,000 |
2023 Through 2027 [Member] |  |
Income Taxes [Line Items] |  |
Income tax net operating loss carryforwards | 59,900,000 |
2028 Through 2032 [Member] |  |
Income Taxes [Line Items] |  |
Income tax net operating loss carryforwards | $ 65,900,000 |

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