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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Sep. 30, 2021
Sep. 30, 2020
ASSETS    
Allowances for accounts receivable $ 290 $ 358
LIABILITIES AND STOCKHOLDERS’ EQUITY    
Debt issuance costs $ 8,983 $ 10,891
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 63,000,000
Common stock, shares issued (in shares) 31,294,198 31,012,326
Common stock, shares outstanding (in shares) 31,294,198 31,012,326