Common Stock and Stock Compensation - Restricted Stock Award Activity (Details) - Restricted stock	6 Months Ended
	Mar. 31, 2022 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding, beginning balance (in shares)	2,218,777
Granted (in shares)	1,362,750
Released (in shares)	(486,627)
Cancelled (in shares)	(711,844)
Outstanding, ending balance (in shares)	2,383,056
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Outstanding, beginning balance (in dollars per share) | $ / shares	$ 4.86
Granted (in dollars per share) | $ / shares	7.37
Released (in dollars per share) | $ / shares	4.77
Cancelled (in dollars per share) | $ / shares	6.47
Outstanding, ending balance (in dollars per share) | $ / shares	$ 6.30
Shares withheld to satisfy related income tax withholding (in shares)	101,103