Stockholders' Equity, Employee Stock Purchase Plan (Details) - USD ($) $ in Thousands		12 Months Ended
	Feb. 23, 2021	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Employee Stock Purchase Plan [Abstract]
Equity-based compensation		$ 10,013	$ 5,741	$ 2,213
Weighted Average Assumptions [Abstract]
Dividend yield		0.00%
Risk-free interest rate		2.50%
Volatility		57.40%
Expected life		6 months
Employee Stock Purchase Plan [Member]
Employee Stock Purchase Plan [Abstract]
Equity-based compensation		$ 200
Shares purchased under employee stock purchase plan		0
Stock to be purchased under ESPP		$ 500
Common Class A [Member]
Employee Stock Purchase Plan [Abstract]
Percentage of outstanding shares, ESPP issuance	1.00%
Common Class A [Member] | Maximum [Member]
Employee Stock Purchase Plan [Abstract]
ESPP shares issuance (in shares)	299,505