Deferred tax assets (liabilities) (Detail) (USD $)	Sep. 30, 2012		Sep. 30, 2011
Current
Schedule of Deferred Income Tax Assets and Liabilities [Line Items]
Other accrued liability difference	$ 68,000		$ 63,000
Net deferred tax assets	68,000		63,000
Less valuation allowance	(68,000)	[1]	(63,000)	[1]
Net deferred tax assets
Long Term
Schedule of Deferred Income Tax Assets and Liabilities [Line Items]
Tax effect of net operating loss carry-forward (includes $13,000 of charitable carry-forward)	2,666,000		3,128,000
Partnership basis difference	148,000		147,000
Deferred revenue	117,000		126,000
Property and equipment basis differences	387,000		339,000
Other accrued liability difference	57,000		43,000
Net deferred tax assets	3,375,000		3,783,000
Less valuation allowance	(3,375,000)	[1]	(3,783,000)	[1]
Net deferred tax assets

[1] The valuation allowance decreased by $403,000 during the year ended September 30, 2012.