Note 4 - Loans - Secured Loans by Lien Position in the Collateral (Detail) $ in Thousands		6 Months Ended	12 Months Ended
		Jun. 30, 2016 USD ($) MortgageLoan	Dec. 31, 2015 USD ($) MortgageLoan	Jun. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)
Loans Details - Secured Loans by Lien Position in the Collateral [Line Items]
Loans - principal (in Dollars)		$ 90,531	$ 62,740	$ 71,353	$ 71,017
Liens due other lenders at loan closing (in Dollars)		33,765	30,920
Total debt (in Dollars)		124,296	93,660
Appraised property value at loan closing (in Dollars)		$ 245,659	$ 178,188
Percent of total debt to appraised values (LTV) at loan closing	[1]	51.80%	54.50%
Loans - percent		100.00%	100.00%
Loans | MortgageLoan		56	53
First Trust Deeds [Member]
Loans Details - Secured Loans by Lien Position in the Collateral [Line Items]
Loans - principal (in Dollars)		$ 66,828	$ 44,078
Loans - percent		74.00%	70.00%
Loans | MortgageLoan		33	32
Second Trust Deeds [Member]
Loans Details - Secured Loans by Lien Position in the Collateral [Line Items]
Loans - principal (in Dollars)		$ 20,703	$ 18,662
Loans - percent		23.00%	30.00%
Loans | MortgageLoan		22	21
Third Trust Deeds [Member]
Loans Details - Secured Loans by Lien Position in the Collateral [Line Items]
Loans - principal (in Dollars)		$ 3,000
Loans - percent		3.00%
Loans | MortgageLoan		1

[1] Based on appraised values and liens due other lenders at loan closing. The weighted-average loan-to-value (LTV) computation above does not take into account subsequent increases or decreases in property values following the loan closing, nor does it include decreases or increases of the amount owing on senior liens to other lenders.