Note 4 - Loans (Details) - Secured Loans Summarized by Payment Delinquency (USD $)	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Principal	$ 76,742,000	$ 71,017,000
Past Due 30-89 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Principal	96,000
Past Due 90-179 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Principal		96,000
Past Due 180 Days or More [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Principal	16,977,000	17,450,000
Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Principal	17,073,000	17,546,000
Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Principal	$ 59,669,000	$ 53,471,000