Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2015	Sep. 30, 2014
Consolidated Balance Sheets
Accounts receivable, allowance for doubtful accounts (in dollars)	$ 5,892	$ 5,332
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	950,000,000	950,000,000
Common stock, shares issued	97,538,124	97,010,286
Common stock, shares outstanding	97,538,124	97,010,286