Fair Value Measurements - Gain (Loss) on Financial Instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Gain (loss) on financial instruments, net	$ 9,774	$ (2,242)
Other public equity securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Gain (loss) on financial instruments, net	364	(831)
Loss on initial issuance of convertible debt and warrant issuance to Yorkville
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Gain (loss) on financial instruments, net	0	(2,307)
Convertible debt
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Gain (loss) on financial instruments, net	0	100
Warrants liability
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Gain (loss) on financial instruments, net	(81)	1,732
Prepaid forward liability
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Gain (loss) on financial instruments, net	0	14
Derivative liability
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Gain (loss) on financial instruments, net	9,496	0
Related party, fair value using quoted market prices of similar assets in active market
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Gain (loss) on financial instruments, net	(5)	(552)
Other, without a readily determinable fair value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Gain (loss) on financial instruments, net	$ 0	$ (398)