Fair Value Measurements - Fair value measurement inputs (Details)	Dec. 31, 2021 $ / shares	Mar. 31, 2021 $ / shares
Stock price (in usd per share)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Promissory note, fair value measurement inputs	0	3.75
Time
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Promissory note, expected term		1 year 6 months
Risk-free rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Promissory note, fair value measurement inputs	0	0.0012
Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Promissory note, fair value measurement inputs	0	0.506