v3.26.3
Description of Business and Liquidity (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Mar. 31, 2026
Description of Business and Liquidity [Abstract]          
Cash, cash equivalents, and marketable securities $ 4,207,586   $ 4,207,586   $ 4,291,833
Retained earnings (accumulated deficit) (1,164,473)   (1,164,473)   $ (501,814)
Income (loss) from continuing operations, net of tax $ (152,974) $ (166,039) $ (443,580) $ (439,950)