Annual report pursuant to Section 13 and 15(d)

Revenue Recognition - Additional Information (Detail)

v3.22.1
Revenue Recognition - Additional Information (Detail) - USD ($)
 12 Months Ended
Jun. 01, 2021
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2020
Contract With Customer Assets And Liabilities [Line Items]        
Net sales   $ 122,814,000 $ 97,489,000 $ 90,604,000
Percentage of revenue from contracts recognized over time   75.00% 60.00% 70.00%
Percentage of revenue from contracts recognized upon shipment   25.00% 40.00% 30.00%
Acquisition of contract liabilities $ 6,048,000      
Revenue recognized included in contract liability   $ 18,263,000    
Unbilled revenue (contract assets)   5,576,000    
Contract with customer liability increase in contract asset due to contract progress.   58,660,000    
Acquisition of contract assets   7,068,000    
Contract with customer liability offset by invoicing to customers.   60,152,000    
Customer deposits, current   (11,585,000)    
Contract with customer liability offset by new customer deposits   23,800,000    
Receivables billed but not paid under retainage provisions in its customer contracts   3,182,000 $ 3,747,000  
Amortization expense   166,000 600,000 $ 169,000
Revenue remaining unsatisfied performance obligations amount   256,536,000    
Customer Deposit [Member]        
Contract With Customer Assets And Liabilities [Line Items]        
Contract liabilities   4,216,000 1,603,000  
Prepaid Expenses and Other Current Assets [Member]        
Contract With Customer Assets And Liabilities [Line Items]        
Capitalized costs, net of amortization   32,000 39,000  
Sudan [Member]        
Contract With Customer Assets And Liabilities [Line Items]        
Net sales   0    
Iran [Member]        
Contract With Customer Assets And Liabilities [Line Items]        
Net sales   0    
Syria [Member]        
Contract With Customer Assets And Liabilities [Line Items]        
Net sales   $ 0    
Barber Nichols L L C [Member]        
Contract With Customer Assets And Liabilities [Line Items]        
Acquisition of contract liabilities     $ 6,048,000