Note 4 - Loans - Secured Loans by Lien Position in the Collateral (Detail) $ in Thousands		3 Months Ended	12 Months Ended
		Mar. 31, 2017 USD ($) MortgageLoan	Dec. 31, 2016 USD ($) MortgageLoan
Loans Details - Secured Loans by Lien Position in the Collateral [Line Items]
Loans - principal (in Dollars)		$ 98,654	$ 94,851
Liens due other lenders at loan closing (in Dollars)		30,858	35,054
Total debt (in Dollars)		129,512	129,905
Appraised property value at loan closing (in Dollars)		$ 243,361	$ 245,329
Percent of total debt to appraised values (LTV) at loan closing	[1]	56.10%	54.00%
Loans - percent		100.00%	100.00%
Loans | MortgageLoan		72	75
First Trust Deeds [Member]
Loans Details - Secured Loans by Lien Position in the Collateral [Line Items]
Loans - principal (in Dollars)		$ 78,620	$ 73,712
Loans - percent		80.00%	78.00%
Loans | MortgageLoan		47	48
Second Trust Deeds [Member]
Loans Details - Secured Loans by Lien Position in the Collateral [Line Items]
Loans - principal (in Dollars)		$ 17,034	$ 18,139
Loans - percent		17.00%	19.00%
Loans | MortgageLoan		24	26
Third Trust Deeds [Member]
Loans Details - Secured Loans by Lien Position in the Collateral [Line Items]
Loans - principal (in Dollars)		$ 3,000	$ 3,000
Loans - percent		3.00%	3.00%
Loans | MortgageLoan		1	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.