Income Taxes - Carryforwards (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Mar. 31, 2022
Operating Loss Carryforwards [Line Items]
Valuation allowance	$ 51,902	$ 26,510
U.S. federal
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	50,600
Capital loss carryforwards	101,300
Income tax credit carryforwards	400
U.S. state
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	11,500
Net operating loss carryforwards	47,700
Income tax credit carryforwards	400
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Valuation allowance	25,400
Domestic Tax Authority | Capital Loss Carryforward
Operating Loss Carryforwards [Line Items]
Valuation allowance	51,600
Foreign Tax Authority | Loss and Other Credit Carryforward
Operating Loss Carryforwards [Line Items]
Valuation allowance	$ 300