Shareholders' Equity and Share-based Payments (Details) (USD $)	3 Months Ended		6 Months Ended					0 Months Ended	3 Months Ended			6 Months Ended		3 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013 item	Mar. 31, 2012	Apr. 29, 2013	Sep. 30, 2012	Feb. 03, 2012	Jan. 25, 2013 Option	Mar. 31, 2013 Option	Mar. 31, 2013 1998 Plan	Mar. 31, 2012 1998 Plan	Mar. 31, 2013 1998 Plan	Mar. 31, 2012 1998 Plan	Mar. 31, 2013 Restricted Plan	Mar. 31, 2012 Restricted Plan	Mar. 31, 2013 Restricted Plan	Mar. 31, 2012 Restricted Plan	Mar. 31, 2013 Restricted Plan Non-employee directors item	Mar. 31, 2013 2009 Plan	Mar. 31, 2012 2009 Plan	Mar. 31, 2013 2009 Plan	Mar. 31, 2012 2009 Plan	Mar. 31, 2013 2009 Plan Non-employee directors	Mar. 31, 2012 2009 Plan Non-employee directors	Mar. 31, 2013 2009 Plan Non-employee directors	Mar. 31, 2012 2009 Plan Non-employee directors	Mar. 31, 2013 2009 Plan Employees	Mar. 31, 2012 2009 Plan Employees	Mar. 31, 2013 2009 Plan Employees	Mar. 31, 2012 2009 Plan Employees	Mar. 31, 2013 2009 Plan Performance-based Award Employees
Shareholders' Equity and Share-based Payments
Common stock, shares authorized	75,000,000		75,000,000			75,000,000
Preferred Stock, shares authorized	10,000,000		10,000,000			10,000,000
Share-based compensation
Share-based compensation expense	$ 260,000	$ 151,000	$ 443,000	$ 290,000					$ 22,000	$ 21,000	$ 25,000	$ 31,000	$ 51,000	$ 0	$ 0	$ 0	$ 0		$ 239,000	$ 126,000	$ 413,000	$ 239,000	$ 50,000	$ 50,000	$ 100,000	$ 100,000	$ 189,000	$ 76,000	$ 312,000	$ 139,000
Unrecognized compensation cost, related to non-vested stock options									59,000
Excess (shortfall) in income tax benefits related to share-based compensation arrangements	(2,000)	(2,000)	(12,000)	(2,000)
Reduction in applicable option exercise price of each outstanding option (in dollars per share)								$ 1.50
Number of share-based compensation plans maintained by the company			3
Number of shares of common stock available for awards under the plan														0		0			382,243		382,243
Number of stock options granted under the plan (in shares)												0
Number of shares of common stock reserved for awards										3,389,000		3,389,000							1,200,000		1,200,000
Fair market value of annual award of non-vested shares																		40,000
Number of quarterly installments of shares awards																		4
Maximum award (in shares)																															300,000
Stock repurchase program
Maximum number of shares of outstanding common stock approved to acquire under repurchase program					250,000		1,000,000
Number of shares of common stock purchased under the repurchase program	0	52,585	175	141,101
Cost of common stock purchased under the repurchase program	$ 0	$ 210,826	$ 696	$ 559,506
Average market price of common stock purchased under the repurchase program (in dollars per share)	$ 0.00	$ 3.99	$ 3.96	$ 3.95