Stock-Based Compensation - Option activity (Details) - USD ($)	3 Months Ended		12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Sep. 30, 2025
Employee Stock Option
Number of Shares
Balance, Beginning (in shares)	3,611,362
Granted (in shares)	3,103,887
Expired (in shares)	(74,368)
Balance, Ending (in shares)	6,640,881		3,611,362
Vested and exercisable (in shares)	2,721,153
Weighted Average Exercise Price
Balance, Beginning (in dollars per share)	$ 11.36
Granted (in dollars per share)	1.15
Expired (in dollars per share)	22.7
Balance, Ending (in dollars per share)	6.46		$ 11.36
Vested and exercisable (in dollars per share)	$ 13.69
Weighted Average Remaining Contractual Term (Years)
Balance-Remaining contractual term	8 years 8 months 12 days		7 years 10 months 24 days
Vested and exercisable -Remaining contractual term	7 years 4 months 24 days
Aggregate intrinsic value, Outstanding	$ 1,486,439
Aggregate intrinsic value, Vested and exercisable	$ 61,687
Grant date fair value of options (in dollars per share)	$ 1.02	$ 4.67
Performance-based stock options
Number of Shares
Balance, Beginning (in shares)	125,500
Forfeited (in shares)	(90,500)
Expired (in shares)	(5,000)
Balance, Ending (in shares)	30,000		125,500
Vested and exercisable (in shares)	30,000
Weighted Average Exercise Price
Balance, Beginning (in dollars per share)	$ 12.92
Forfeited (in dollars per share)	6.78
Expired (in dollars per share)	28.8
Balance, Ending (in dollars per share)	28.8		$ 12.92
Vested and exercisable (in dollars per share)	$ 28.8
Weighted Average Remaining Contractual Term (Years)
Balance-Remaining contractual term	6 years		7 years 7 months 6 days
Vested and exercisable -Remaining contractual term	6 years