Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Class of Stock [Line Items]
Secured financing	$ 17,381	$ 13,394
Preferred stock, par value (in USD 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
Common Class A
Class of Stock [Line Items]
Common stock, par value (in USD per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	300,000,000	300,000,000
Common stock, shares issued (in shares)	36,290,183	29,842,784
Common stock, shares outstanding (in shares)	36,290,183	29,842,784
Common Class B
Class of Stock [Line Items]
Common stock, par value (in USD per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	16,739,846	22,049,727
Common stock, shares outstanding (in shares)	16,739,846	22,049,727