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Debt (Details Narrative)
SFr in Thousands, $ in Thousands
12 Months Ended
Jan. 31, 2019
USD ($)
May 31, 2018
USD ($)
Apr. 24, 2015
USD ($)
Oct. 01, 2012
USD ($)
Oct. 01, 2012
CHF (SFr)
Mar. 30, 2019
USD ($)
Number
Mar. 31, 2018
USD ($)
Apr. 01, 2017
USD ($)
Mar. 30, 2019
CHF (SFr)
Oct. 01, 2012
CHF (SFr)
Debt Instruments, Issuance Costs           $ 1,912 $ 2,968      
Unamortization Of Financing Costs           852    
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months           467        
Long-term Debt, Maturities, Repayments of Principal in Year Two           467        
Long-term Debt, Maturities, Repayments of Principal in Year Three           467        
Long-term Debt, Maturities, Repayments of Principal in Year Four           467        
Long-term Debt, Maturities, Repayments of Principal in Year Five           39,717        
Long-term Debt, Maturities, Repayments of Principal after Year Five           3,973        
Schaublin [Member]                    
Cash paid for purchase price       $ 5,053            
Schaublin [Member] | CHF                    
Cash paid for purchase price | SFr         SFr 4,767          
Schaublin [Member] | Land and Building [Member]                    
Land and building leased       $ 14,910            
Period for fixed rate on mortgage loan       20 years 20 years          
Mortgage loan interest rate       2.90% 2.90%          
Mortgage loan fixed rate       $ 9,857            
Mortgage loan           $ 6,308        
Schaublin [Member] | Land and Building [Member] | CHF                    
Land and building leased | SFr                   SFr 14,067
Mortgage loan fixed rate | SFr                   SFr 9,300
Mortgage loan | SFr                 SFr 6,278  
Maximum [Member] | Amended Credit Agreement [Member]                    
Consolidated net debt adjusted EBITDA ratio | Number           3.50        
Minimum [Member] | Amended Credit Agreement [Member]                    
Consolidated net debt adjusted EBITDA ratio | Number           1        
Revolver [Member]                    
Line of Credit           $ 3,990        
Line of Credit Facility, Remaining Borrowing Capacity           206,760        
Unamortized debt issuance costs           $ 1,912        
Revolver [Member] | Amended Credit Agreement [Member]                    
Line of Credit $ 250,000                  
Unamortized debt issuance costs $ 852                  
Debt instrument maturity term Jan. 31, 2024                  
Term Loan [Member]                    
Unamortization Of Financing Costs   $ 987                
Sargent Aerospace Defense Business [Member]                    
Business Acquisition, Date of Acquisition Agreement     Apr. 24, 2015              
Sargent Aerospace Defense Business [Member] | Revolving Credit Facility [Member]                    
Debt Instrument, Face Amount     $ 350,000              
Sargent Aerospace Defense Business [Member] | Term Loan [Member]                    
Debt Instrument, Face Amount     $ 200,000              
Swingline Lender And Letter Of Credit Issuer [Member] | Base Rate [Member]                    
Debt Instrument, Basis Spread on Variable Rate           0.00%        
Swingline Lender And Letter Of Credit Issuer [Member] | London Interbank Offered Rate (LIBOR) [Member]                    
Debt Instrument, Basis Spread on Variable Rate           0.75%        
Debt Instrument, Description of Variable Rate Basis           Higher of (1) Wells Fargo’s prime lending rate, (2) the federal funds effective rate plus 1/2 of 1% and (3) the one-month LIBOR rate plus 1%, or (b) LIBOR plus a specified margin, depending on the type of borrowing being made.