Note 5 - Real Estate Owned (REO) (Detail)	3 Months Ended
	Mar. 31, 2017 USD ($) a Property
Real Estate Owned REO Details [Line Items]
Mortgages payable | $	$ 0
Residential Properties [Member]
Real Estate Owned REO Details [Line Items]
Lease term	1 year
Commercial [Member]
Real Estate Owned REO Details [Line Items]
Lease term	3 years
Lease, Periodic Payment (in Dollars) | $	$ 85,000
Lease, Expiration Period	2017-08
Rental Property [Member]
Real Estate Owned REO Details [Line Items]
Number of Real Estate Properties	5
Non Rental Held For Sale [Member] | Residential Single Family [Member]
Real Estate Owned REO Details [Line Items]
Number of Real Estate Properties	3
Contra Costa [Member] | Rental Property Held For Sale [Member] | Commercial Property [Member]
Real Estate Owned REO Details [Line Items]
Number of Real Estate Properties	1
Los Angeles [Member] | Condominium Complex [Member]
Real Estate Owned REO Details [Line Items]
Number of Units in Real Estate Property	42
Gains (Losses) on Sales of Other Real Estate (in Dollars) | $	$ 102,000
Los Angeles [Member] | Rental Property Held For Sale [Member] | Condominium Complex [Member]
Real Estate Owned REO Details [Line Items]
Number of Units in Real Estate Property	38
Los Angeles [Member] | Sold [Member] | Condominium Complex [Member]
Real Estate Owned REO Details [Line Items]
Number of Units in Real Estate Property	4
San Francisco County [Member] | Rental Property Held For Sale [Member] | Commercial Property [Member]
Real Estate Owned REO Details [Line Items]
Number of Real Estate Properties	1
San Francisco County [Member] | Rental Property Held For Sale [Member] | Condominium Complex [Member]
Real Estate Owned REO Details [Line Items]
Number of Units in Real Estate Property	8
Ventura [Member] | Rental Property Held For Sale [Member] | Commercial/Retail Property [Member]
Real Estate Owned REO Details [Line Items]
Number of Real Estate Properties	1
Fresno County California [Member] | Non Rental Held For Sale [Member] | Residential Single Family [Member]
Real Estate Owned REO Details [Line Items]
Number of Units in Real Estate Property	1
Marin County [Member] | Non Rental Held For Sale [Member] | Residential Single Family [Member]
Real Estate Owned REO Details [Line Items]
Area of Real Estate Property (in Acres) | a	13
Stanislaus County [Member] | Non Rental Held For Sale [Member] | Residential Single Family [Member]
Real Estate Owned REO Details [Line Items]
Area of Real Estate Property (in Acres) | a	14