Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Sep. 30, 2013
Allowance for doubtful accounts receivable	$ 4,846	$ 3,567
Common stock, par value per share	$ 0.001	$ 0.001
Common stock, shares authorized	195,000	195,000
Common stock, shares issued	56,891	56,044
Common stock, shares outstanding	56,891	56,044