Stock-Based Compensation - Schedule of Restricted Stock Units Activity (Details) - Restricted Stock Units (RSUs)	9 Months Ended
	Jun. 30, 2021 $ / shares shares
Number of Restricted Stock Units
Outstanding at beginning of period (in shares) | shares	154,034
Granted (in shares) | shares	104,550
Vested (in shares) | shares	(55,748)
Forfeited/canceled (in shares) | shares	(1,917)
Outstanding at end of period (in shares) | shares	200,919
Weighted Average Grant Value Per Share
Outstanding at beginning of period (in dollars per share) | $ / shares	$ 35.37
Granted (in dollars per share) | $ / shares	24.08
Vested (in dollars per share) | $ / shares	32.50
Forfeited/canceled (in dollars per share) | $ / shares	32.58
Outstanding at end of period (in dollars per share) | $ / shares	$ 30.32