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