v3.26.1
Income taxes - Schedule of Reconciliation of Federal Statutory Rate to Company's Effective Tax Rate (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Amount      
Income before provision for income taxes $ 40,459 $ 145,495 $ 140,990
Federal statutory rate (8,497)    
State and local income taxes, net of federal income tax effect (1,639)    
Global intangible low-taxed income (1,985)    
Subpart F (546)    
Other (53)    
IRC section 162(m) limitation (15,025)    
Stock-based compensation 14,001    
Enhanced inventory deduction 645    
Other (372)    
Foreign tax credits 1,083    
Change in valuation allowance (24)    
Change in unrecognized tax benefits (173)    
Total provision for income taxes $ (14,141) $ (33,406) $ (13,327)
Percent      
Federal statutory rate 21.00% 21.00% 21.00%
State tax, net of federal benefit 4.10% 3.20% 1.80%
Effects of foreign operations   1.60% 0.00%
Other adjustments   0.30% 0.20%
Global intangible low-taxed income 4.90%    
Subpart F 1.30%    
Other 0.10%    
IRC section 162(m) limitation 37.10%    
Stock-based compensation (34.60%)    
Enhanced inventory deduction (1.60%)    
Nondeductible business expenses   0.40% 0.40%
Nondeductible employee compensation 0.90% 16.00% 4.30%
Provision-to-return adjustment   (0.30%) (0.20%)
Uncertain tax positions   0.10% 0.00%
Stock-based compensation   (19.30%) (18.40%)
Foreign tax credits (2.70%)    
Change in valuation allowance 0.10% 0.00% 0.40%
Change in unrecognized tax benefits 0.40%    
Effective tax rate 34.90% 23.00% 9.50%
UK      
Amount      
Statutory rate difference $ (710)    
Other adjustments $ (495)    
Percent      
Effects of foreign operations 1.80%    
Other adjustments 1.20%    
Other foreign jurisdictions      
Amount      
Statutory rate difference $ (73)    
Percent      
Effects of foreign operations 0.20%    
United States      
Amount      
Other adjustments $ (278)    
Percent      
Other adjustments 0.70%