Note 4 - Notes Payable (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Non-recourse notes payable - investment partnerships	$ 2,341,000	$ 6,070,000
Interest expense on non-recourse notes - investment partnerships	408,000	566,000
Accrued interest non-recourse ntoes payable - investment partnerships	5,750,000	15,215,000
Extinguishment of non-recourse notes payable in connection with 2012 sales	2,329,000
Extinguishment of accrued interest on non-recourse notes payable in connection with 2012 sales	6,036,000
Extinguishment of non-recourse notes payable - October 2012 sale	1,400,000
Extinguishment of accrued interest on non-recourse notes payable - October 2012 sale	$ 3,837,000