Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023
Accumulated depreciation	$ 3,112	$ 3,212
Accumulated amortization	1,113	983
Accumulated amortization	$ 80,678	$ 78,324
Class A Common Stock
Common stock, par value (in usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	31,950,000
Common stock, shares issued (in shares)	15,710,555	15,712,007
Common stock shares outstanding (in shares)	15,710,555	15,712,007
Class B-1 Common Stock
Common stock, par value (in usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	1,000,000	1,000,000
Common stock, shares issued (in shares)	1,000,000	1,000,000
Common stock shares outstanding (in shares)	1,000,000	1,000,000
Class B-2 Common Stock
Common stock, par value (in usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	15,000,000	15,000,000
Common stock, shares issued (in shares)	15,000,000	15,000,000
Common stock shares outstanding (in shares)	15,000,000	15,000,000