Note 3 - General Partners and Related Parties (Detail) - Formation Loan - Transactions (USD $)	12 Months Ended		24 Months Ended	36 Months Ended	48 Months Ended		60 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 1996	Dec. 31, 2003	Dec. 31, 2002	Dec. 31, 2008	Dec. 31, 2006	Dec. 31, 2000	Dec. 31, 2012 Initial Offering of $15,000 [Member]	Dec. 31, 1996 1996 Offering of $30,000 [Member]	Dec. 31, 2000 2000 offering of $30,000 [Member]	Dec. 31, 2002 2002 Offering of $50,000 [Member]	Dec. 31, 2003 2003 Offering of $75,000 [Member]	Dec. 31, 2005 2005 Offering of $100,000 [Member]
Limited Partner contributions	$ 299,813,000	$ 14,932,000	$ 49,985,000	$ 29,999,000	$ 100,000,000	$ 74,904,000	$ 29,993,000	$ 14,932,000	$ 29,993,000	$ 29,999,000	$ 49,985,000	$ 74,904,000	$ 100,000,000
Formation Loan	22,567,000	1,075,000	3,777,000	2,218,000	7,564,000	5,661,000	2,272,000	1,075,000	2,272,000	2,218,000	3,777,000	5,661,000	7,564,000
Unamortized discount on Formation loan	(1,289,000)									(2,000)	(31,000)	(238,000)	(1,018,000)
Formation Loan, net	21,278,000							1,075,000	2,272,000	2,216,000	3,746,000	5,423,000	6,546,000
Repayments	(14,297,000)							(991,000)	(2,099,000)	(1,883,000)	(2,948,000)	(3,414,000)	(2,962,000)
Early withdrawal penalties	(643,000)							(84,000)	(173,000)	(137,000)	(100,000)	(142,000)	(7,000)
Formation Loan, net at December 31, 2012	6,338,000									196,000	698,000	1,867,000	3,577,000
Unamortized discount on Formation loan	1,289,000									2,000	31,000	238,000	1,018,000
Balance, December 31, 2012	$ 7,627,000									$ 198,000	$ 729,000	$ 2,105,000	$ 4,595,000
Percent loaned	7.50%							7.20%	7.60%	7.40%	7.60%	7.60%	7.60%