Note D - Investments in Real Estate Loans (Detail) (USD $)	6 Months Ended		12 Months Ended
	Jun. 30, 2012		Dec. 31, 2011
Mortgage Loans on Real Estate, Number of Loans	16		20
Weighted Average Interest Rate On Performing Loans	8.63%		10.09%
Mortgage Loans Non Performing Loans (in Dollars)	$ 0
Impaired Financing Receivable, Related Allowance (in Dollars)	1,629,000	[1]	5,485,000	[1]
Allowance For Performing Loans	73.00%
Financing Receivable, Modifications, Number of Contracts			7
Financing Receivable, Modifications, Recorded Investment (in Dollars)	2,200,000		4,400,000
Investment in real estate loans, net of allowance for loan losses of $1,629,000 at June 30, 2012 and $5,485,000 at December 31, 2011 (in Dollars) (in Dollars)	11,739,000		10,767,000
Performing Loans [Member]
Weighted Average Interest Rate On Performing Loans	8.11%		9.77%
Impaired Financing Receivable, Related Allowance (in Dollars)	629,000	[1]	1,761,000	[1]
Investment in real estate loans, net of allowance for loan losses of $1,629,000 at June 30, 2012 and $5,485,000 at December 31, 2011 (in Dollars) (in Dollars)	11,739,000		6,920,000
Nonperforming Loans [Member]
Mortgage Loans on Real Estate, Number of Loans	1		4
Impaired Financing Receivable, Related Allowance (in Dollars)	1,000,000	[1]	3,724,000	[1]
Investment in real estate loans, net of allowance for loan losses of $1,629,000 at June 30, 2012 and $5,485,000 at December 31, 2011 (in Dollars) (in Dollars)			3,847,000
Total Trouble Debt Restructuring [Member]
Financing Receivable, Modifications, Number of Contracts	3
Loans with Interest Reserves [Member]
Mortgage Loans on Real Estate, Number of Loans	2
Minimum [Member]
Percentage Of Real Estate Loan Portfolio	4.50%
Maximum [Member]
Percentage Of Real Estate Loan Portfolio	15.00%
Extensions [Member] | VRMI I, VRMI II, and Fund III [Member]
Investment in real estate loans, net of allowance for loan losses of $1,629,000 at June 30, 2012 and $5,485,000 at December 31, 2011 (in Dollars) (in Dollars)	8,400,000
Extensions [Member]
Mortgage Loans on Real Estate, Number of Loans	5
Investment in real estate loans, net of allowance for loan losses of $1,629,000 at June 30, 2012 and $5,485,000 at December 31, 2011 (in Dollars) (in Dollars)	3,000,000
Loans That Became Non Performing After Extension [Member] | VRMI I, VRMI II, and Fund III [Member]
Investment in real estate loans, net of allowance for loan losses of $1,629,000 at June 30, 2012 and $5,485,000 at December 31, 2011 (in Dollars) (in Dollars)	4,300,000
Loans That Became Non Performing After Extension [Member]
Investment in real estate loans, net of allowance for loan losses of $1,629,000 at June 30, 2012 and $5,485,000 at December 31, 2011 (in Dollars) (in Dollars)	$ 1,000,000

[1] Please refer to Specific Reserve Allowances below.