Shareholders' Equity (Details) (USD $)	12 Months Ended							12 Months Ended			12 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2012 Stock options	Sep. 30, 2011 Stock options	Sep. 30, 2010 Stock options	Sep. 30, 2013 Stock options	Sep. 30, 2012 Restricted stock	Sep. 30, 2011 Restricted stock	Sep. 30, 2013 Restricted stock	Sep. 30, 2012 RSUs	Sep. 30, 2012 2001 Stock Incentive Plan	Sep. 30, 2012 2010 Stock Incentive Plan	Jan. 28, 2010 2010 Stock Incentive Plan
Stock Options and Restricted Stock
Options outstanding (in shares)				1,501,500	1,588,750	1,632,700						1,083,500
Period during which awards may be granted													10 years
Shares awards, additional information
Shares available for issuance under the plan (in shares)													346,627
Options outstanding (in shares)				1,501,500	1,588,750	1,632,700						1,083,500
Shares Reserved For Grant
Option Plan approved (in shares)												2,000,000		1,000,000
Restricted stock
Compensation expenses (in dollars)	$ 983,000	$ 1,496,000	$ 1,481,000	$ 746,000	$ 1,437,000	$ 1,481,000		$ 237,000	$ 59,000
Unamortized compensation cost (in dollars)							$ 467,000			$ 629,000
Weighted average period in which unamortized compensation cost is expected to be recognized				1 year 4 months 24 days				2 years 6 months
Restricted Shares
Unvested balance at the beginning of the period (in shares)								40,000	40,000
Granted (in shares)								61,883	40,000
Vested (in shares)									(40,000)
Forfeited (in shares)								(2,000)
Unvested balance at the end of the period (in shares)								99,883	40,000
Restricted Shares ,Weighted Average Grant Date Fair Value
Unvested balance at the beginning of the period (in dollars per shares)								$ 10.99	$ 11.77
Granted (in dollars per shares)								$ 7.86	$ 10.99		$ 7.86
Vested (in dollars per shares)									$ 11.77
Forfeited (in dollars per shares)								$ 7.86
Unvested balance at the end of the period (in dollars per shares)								$ 9.11	$ 10.99
Restricted stock units
Number of units issued											135,491