Note 5 - Distressed Residential Mortgage Loans (Details) - Geographic Concentrations of Credit Risk (Residential Distressed Mortgage Loans Held in Securitization Trust [Member], Geographic Concentration Risk [Member])	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
California [Member]
Concentration Risk [Line Items]
Geographic Concentrations	13.70%	14.40%
Florida [Member]
Concentration Risk [Line Items]
Geographic Concentrations	11.50%	8.30%
New York [Member]
Concentration Risk [Line Items]
Geographic Concentrations	7.70%	8.10%
Texas [Member]
Concentration Risk [Line Items]
Geographic Concentrations	6.80%	6.60%