CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Mar. 31, 2026	Sep. 30, 2025
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Class A Common Stock
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	400,000,000	400,000,000
Common stock, shares issued (in shares)	48,710,906	47,963,617
Common stock, shares outstanding (in shares)	47,965,450	47,406,498
Treasury stock, shares (in shares)	745,456	557,119
Class B Common Stock
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	11,481,568	11,463,770
Common stock, shares outstanding (in shares)	8,549,118	8,538,165
Treasury stock, shares (in shares)	2,932,450	2,925,605