Redeemable Convertible Preferred Stock and Stockholders’ Equity - Stock Repurchased (Details) - USD ($) $ in Thousands	3 Months Ended	5 Months Ended	9 Months Ended
	Jun. 30, 2021	Jun. 30, 2021	Sep. 30, 2020
Class of Stock [Line Items]
Number of Shares Repurchased		329,601	0
Amount Paid	$ 17,002	$ 8,085
Series A common stock
Class of Stock [Line Items]
Number of Shares Repurchased		63,821
Amount Paid		$ 1,566
Series AA Preferred
Class of Stock [Line Items]
Number of Shares Repurchased		160,136
Amount Paid		$ 3,928
Series D Preferred
Class of Stock [Line Items]
Number of Shares Repurchased		60,137
Amount Paid		$ 1,475
Series E Preferred
Class of Stock [Line Items]
Number of Shares Repurchased		45,507
Amount Paid		$ 1,116