Statements Of Changes In Stockholders' Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Retained Earnings [Member]	Other Comprehensive Loss [Member]	Total
Balance at Sep. 30, 2011	$ 9,567	$ 15,462	$ (189)	$ 24,840
Balance (in shares) at Sep. 30, 2011	5,741,451
Net income		152		152
Dividends paid		(144)		(144)
Unrealized gain on investment in Hennessy Micro Cap Growth Fund, LLC			46	46
Employee and director restricted stock vested (in shares)	21,478
Repurchase of vested employee restricted stock for tax withholding	(24)			(24)
Repurchase of vested employee restricted stock for tax withholding (in shares)	(8,697)
Deferred restricted stock unit compensation	25			25
Tax effect of RSU vesting	(20)			(20)
Balance at Dec. 31, 2011	$ 9,548	$ 15,470	$ (143)	$ 24,875
Balance (in shares) at Dec. 31, 2011	5,754,232