Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2016	Sep. 30, 2015
Accounts receivable:
Allowance for doubtful accounts	$ 103	$ 462
Other non-current assets:
Allowance for non-current assets	$ 0	$ 3,561
Shareholders’ equity:
Preferred stock, par value (in usd per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	5,882,000	5,882,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (USD per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	33,012,000	32,586,000
Common stock, shares outstanding (in shares)	26,102,000	25,676,000
Treasury stock, shares held (in shares)	6,910,000	6,910,000