Annual report pursuant to Section 13 and 15(d)

Deferred contract costs (Details)

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Deferred contract costs (Details) (USD $)
12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2010
Deferred contract costs      
Deferred contract costs $ 16,147,000 $ 12,826,000  
Less: accumulated amortization (6,863,000) (4,806,000)  
Total deferred contract costs, net 9,284,000 8,020,000  
Deferred contract cost amortization expense $ 2,000,000 $ 1,700,000 $ 1,700,000