v3.26.3
Investments and Fair Value Measurements - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Mar. 31, 2026
Assets, Fair Value Disclosure [Abstract]    
Total financial assets $ 1,633,655 $ 654,958
Mutual funds    
Assets, Fair Value Disclosure [Abstract]    
Marketable securities: 3,470 2,165
U.S. treasury securities    
Assets, Fair Value Disclosure [Abstract]    
Marketable securities: 72,182 92,580
Corporate debt securities    
Assets, Fair Value Disclosure [Abstract]    
Marketable securities: 26,040 25,470
Commercial paper    
Assets, Fair Value Disclosure [Abstract]    
Marketable securities: 2,668 2,588
U.S. government agency securities    
Assets, Fair Value Disclosure [Abstract]    
Marketable securities: 1,250 3,986
Money market funds    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents: 1,513,618 528,169
U.S. treasury securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents: 12,432  
Commercial paper    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents: 1,995  
Level 1    
Assets, Fair Value Disclosure [Abstract]    
Total financial assets 1,517,088 530,334
Level 1 | Mutual funds    
Assets, Fair Value Disclosure [Abstract]    
Marketable securities: 3,470 2,165
Level 1 | U.S. treasury securities    
Assets, Fair Value Disclosure [Abstract]    
Marketable securities: 0 0
Level 1 | Corporate debt securities    
Assets, Fair Value Disclosure [Abstract]    
Marketable securities: 0 0
Level 1 | Commercial paper    
Assets, Fair Value Disclosure [Abstract]    
Marketable securities: 0 0
Level 1 | U.S. government agency securities    
Assets, Fair Value Disclosure [Abstract]    
Marketable securities: 0 0
Level 1 | Money market funds    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents: 1,513,618 528,169
Level 1 | U.S. treasury securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents: 0  
Level 1 | Commercial paper    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents: 0  
Level 2    
Assets, Fair Value Disclosure [Abstract]    
Total financial assets 116,567 124,624
Level 2 | Mutual funds    
Assets, Fair Value Disclosure [Abstract]    
Marketable securities: 0 0
Level 2 | U.S. treasury securities    
Assets, Fair Value Disclosure [Abstract]    
Marketable securities: 72,182 92,580
Level 2 | Corporate debt securities    
Assets, Fair Value Disclosure [Abstract]    
Marketable securities: 26,040 25,470
Level 2 | Commercial paper    
Assets, Fair Value Disclosure [Abstract]    
Marketable securities: 2,668 2,588
Level 2 | U.S. government agency securities    
Assets, Fair Value Disclosure [Abstract]    
Marketable securities: 1,250 3,986
Level 2 | Money market funds    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents: 0 0
Level 2 | U.S. treasury securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents: 12,432  
Level 2 | Commercial paper    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents: 1,995  
Level 3    
Assets, Fair Value Disclosure [Abstract]    
Total financial assets 0 0
Level 3 | Mutual funds    
Assets, Fair Value Disclosure [Abstract]    
Marketable securities: 0 0
Level 3 | U.S. treasury securities    
Assets, Fair Value Disclosure [Abstract]    
Marketable securities: 0 0
Level 3 | Corporate debt securities    
Assets, Fair Value Disclosure [Abstract]    
Marketable securities: 0 0
Level 3 | Commercial paper    
Assets, Fair Value Disclosure [Abstract]    
Marketable securities: 0 0
Level 3 | U.S. government agency securities    
Assets, Fair Value Disclosure [Abstract]    
Marketable securities: 0 0
Level 3 | Money market funds    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents: 0 $ 0
Level 3 | U.S. treasury securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents: 0  
Level 3 | Commercial paper    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents: $ 0