Summary of Significant Accounting Policies - Restructuring Charges (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2023	Dec. 31, 2022
Summary of Significant Accounting Policies
Restructuring and related cost percent	7.00%
Restructuring charges	$ 2,600			$ 11,700
Severance and related costs	4,300		$ 4,210	7,578
Accelerated equity compensation expense	$ 500	$ 2,200		2,200
Write off of capitalized software development costs				1,200
Accelerated amortization expenses				$ 700