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Debt (Details) - USD ($)
9 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Jun. 30, 2019
May 31, 2019
Mar. 31, 2019
Amended Credit Facility [Abstract]          
Debt issuance costs $ 973,000 $ 1,780,000      
Summarized information about the term loan [Abstract]          
Less current portion of term loan (3,678,000)       $ (3,685,000)
Long-term portion of term loan $ 21,380,000       $ 24,187,000
Revolving Facility [Member]          
Amended Credit Facility [Abstract]          
Interest rate at end of period 4.55%       5.24%
Term Loans [Member]          
Amended Credit Facility [Abstract]          
Quarterly principal payments $ 937,500        
Interest rate at end of period 4.45%       5.24%
Summarized information about the term loan [Abstract]          
Principal amount of term loan $ 25,312,000       $ 28,125,000
Unamortized financing fees (254,000)       (253,000)
Net carrying amount of term loan 25,058,000       27,872,000
Less current portion of term loan (3,678,000)       (3,685,000)
Long-term portion of term loan 21,380,000       24,187,000
Future repayments of the Term Loan, by fiscal year [Abstract]          
2020 - remaining three months 937,000        
2021 3,750,000        
2022 3,750,000        
2023 3,750,000        
2024 13,125,000        
Total payments 25,312,000       28,125,000
Second Amended Credit Facility [Member]          
Amended Credit Facility [Abstract]          
Debt issuance costs 973,000        
Second Amended Credit Facility [Member] | Maximum [Member]          
Amended Credit Facility [Abstract]          
Maximum sale and lease back transactions 5,000,000        
Second Amended Credit Facility [Member] | Revolving Facility [Member]          
Amended Credit Facility [Abstract]          
Maximum borrowing capacity     $ 238,620,000    
Outstanding balance under revolving loan 130,000,000        
Amount available under revolving facility 73,767,000        
Second Amended Credit Facility [Member] | Revolving Facility [Member] | Canadian Borrowers [Member]          
Amended Credit Facility [Abstract]          
Maximum borrowing capacity     24,000,000    
Second Amended Credit Facility [Member] | Revolving Facility [Member] | Letters of Credit [Member]          
Amended Credit Facility [Abstract]          
Maximum borrowing capacity     20,000,000    
Outstanding balance under revolving loan $ 4,039,000        
Second Amended Credit Facility [Member] | Revolving Facility [Member] | Swing Line Sublimit [Member]          
Amended Credit Facility [Abstract]          
Maximum borrowing capacity     $ 23,862,000    
Credit Facility [Member]          
Amended Credit Facility [Abstract]          
Maximum borrowing capacity       $ 230,000,000  
Debt instrument, maturity date Jun. 05, 2023        
Credit Facility [Member] | Minimum [Member]          
Amended Credit Facility [Abstract]          
Facility fee on total leverage ratio 0.375%        
Credit Facility [Member] | Maximum [Member]          
Amended Credit Facility [Abstract]          
Dividend payments and share repurchases, annual maximum amount permitted $ 20,000,000        
Facility fee on total leverage ratio 0.50%        
Credit Facility [Member] | LIBOR [Member]          
Amended Credit Facility [Abstract]          
Reference interest rate under option 1, floor 2.25%        
Interest rate over LIBOR rate under option 1 2.50%        
Interest rate above base rate under option 2 2.75%        
Credit Facility [Member] | Reference Rate [Member]          
Amended Credit Facility [Abstract]          
Reference interest rate under option 1, floor 1.25%        
Interest rate over LIBOR rate under option 1 1.50%        
Interest rate above base rate under option 2 1.75%        
Credit Facility [Member] | Revolving Facility [Member]          
Amended Credit Facility [Abstract]          
Maximum borrowing capacity       200,000,000  
Outstanding balance under revolving loan         $ 110,400,000
Credit Facility [Member] | Revolving Facility [Member] | Canadian Borrowers [Member]          
Amended Credit Facility [Abstract]          
Maximum borrowing capacity       20,000,000  
Credit Facility [Member] | Revolving Facility [Member] | Letters of Credit [Member]          
Amended Credit Facility [Abstract]          
Maximum borrowing capacity       15,000,000  
Credit Facility [Member] | Term Loans [Member]          
Amended Credit Facility [Abstract]          
Maximum borrowing capacity       $ 30,000,000