Annual report [Section 13 and 15(d), not S-K Item 405]

Organization and Summary of Significant Accounting Policies- Narrative (Details)

v3.25.1
Organization and Summary of Significant Accounting Policies- Narrative (Details) - USD ($)
 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Business Acquisition [Line Items]      
Entity wide disclosure on geographic areas, revenue from external customers attributed to foreign countries, percentage 49.00% 51.00% 56.00%
Disclosure on geographic areas, long-lived assets in foreign countries 47.00% 49.00%  
Billed contracts receivable $ 4,422,000 $ 4,646,000  
Accounts receivable, allowance for doubtful accounts 1,230,000 1,428,000  
Cloud computing arrangement, unamortized implementation cost 8,250,000 2,800,000  
Asset impairment charges     $ 865,000
Goodwill, impairment loss 0 0 0
Goodwill acquired $ 114,000 51,750,000  
Standard warranty term 1 year    
Research and development expense $ 9,408,000 9,799,000 $ 10,568,000
Minimum      
Business Acquisition [Line Items]      
Standard warranty term 1 year    
Maximum      
Business Acquisition [Line Items]      
Standard warranty term 18 months    
Prepaid expenses and other current assets      
Business Acquisition [Line Items]      
Cloud computing arrangement, unamortized implementation cost $ 1,206,000 161,000  
Other non-current assets      
Business Acquisition [Line Items]      
Cloud computing arrangement, unamortized implementation cost 7,044,000 2,639,000  
Vapor Power      
Business Acquisition [Line Items]      
Goodwill acquired $ 114,000 $ 51,750,000