CONDENSED BALANCE SHEETS [Parenthetical] (USD $)	Sep. 30, 2011	Mar. 31, 2011
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	20,000,000	20,000,000
Units of limited partnership interest, issued	18,679,738	18,679,738
Units of limited partnership interest, outstanding	18,678,038	18,678,038
Series Seven
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	20,000,000	20,000,000
Units of limited partnership interest, issued	1,036,100	1,036,100
Units of limited partnership interest, outstanding	1,036,100	1,036,100
Series Nine
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	20,000,000	20,000,000
Units of limited partnership interest, issued	4,178,029	4,178,029
Units of limited partnership interest, outstanding	4,177,329	4,177,329
Series Ten
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	20,000,000	20,000,000
Units of limited partnership interest, issued	2,428,925	2,428,925
Units of limited partnership interest, outstanding	2,427,925	2,427,925
Series Eleven
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	20,000,000	20,000,000
Units of limited partnership interest, issued	2,489,599	2,489,599
Units of limited partnership interest, outstanding	2,489,599	2,489,599
Series Twelve
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	20,000,000	20,000,000
Units of limited partnership interest, issued	2,972,795	2,972,795
Units of limited partnership interest, outstanding	2,972,795	2,972,795
Series Fourteen
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	20,000,000	20,000,000
Units of limited partnership interest, issued	5,574,290	5,574,290
Units of limited partnership interest, outstanding	5,574,290	5,574,290