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Disposition of Discontinued Operations - Additional Information (Detail) (USD $) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2011 | Jan. 31, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Net cash provided by the sale of assets |  | $ 2,528,000
Net revenues of the discontinued operations |  | 1,460,000
VLI [Member] |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Net cash provided by the sale of assets | 2,528,000 |
Pretax gain related to sale of assets |  | $ 1,312,000
Liquidation date of subsidiary |  | 2013-12

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