CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
ASSETS
Allowances for accounts receivable	$ 358	$ 304
LIABILITIES AND STOCKHOLDERS’ EQUITY
Debt issuance costs	$ 10,891	$ 12,470
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	63,000,000
Common stock, shares issued (in shares)	31,012,326	30,933,110
Common stock, shares outstanding (in shares)	31,012,326	30,933,110