Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Net loss	$ (73,937)	$ (40,373)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	10,688	7,687
Depreciation on property and equipment	53	44
Non-cash lease expense	290	279
Changes in operating assets and liabilities:
Accounts receivable	(142)	(947)
Prepaid expenses and other current assets	8,262	(9,201)
Accounts payable	25,011	(17,485)
Accrued expenses	(17,294)	(5,542)
Operating lease liabilities	(301)	(281)
Net cash used in operating activities	(47,370)	(65,819)
Cash flows from investing activities
Purchase of property and equipment	(45)	(42)
Net cash used in investing activities	(45)	(42)
Cash flows from financing activities
Proceeds from stock options exercised	890	21
Net cash provided by financing activities	890	21
Effect of exchange rate changes on cash and cash equivalents	(47)	(772)
Net change in cash and cash equivalents	(46,572)	(66,612)
Cash and cash equivalents – beginning of period	376,532	493,817
Cash and cash equivalents – end of period	$ 329,960	$ 427,205