Accrued Liabilities - Rollforward related to restructure (Details) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2024	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Accrued Liabilities.
Beginning balance					$ 2,622	$ 3,631
Severance and other related expenses			$ 4,300		1,268	4,211	$ 7,578
Cash payments					(2,497)	(5,220)	(3,947)
Ending balance	$ 1,393				1,393	$ 2,622	3,631
Accelerated equity compensation expense			500	$ 2,200	$ 300		2,200
Restructuring charges	$ 1,100	$ 300	$ 2,600				$ 11,700