Quarterly report pursuant to Section 13 or 15(d)

Debt (Details)

v3.20.4
Debt (Details) - USD ($)
3 Months Ended 9 Months Ended
Feb. 03, 2021
Feb. 28, 2020
May 22, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
May 23, 2017
Debt Instrument [Line Items]                
Interest income / (expense), net       $ (266,000) $ 59,000 $ (859,000) $ 118,000  
New Credit Agreement                
Debt Instrument [Line Items]                
Credit agreement, interest rate floor   1.75%            
Remaining borrowing capacity       5,000,000   5,000,000    
New Credit Agreement | LIBOR                
Debt Instrument [Line Items]                
Credit agreement, basis spread on variable rate   3.75%            
Line of credit | Revolving credit facility | Subsequent event                
Debt Instrument [Line Items]                
Maximum borrowing capacity $ 100,000,000              
Line of credit | Minimum | LIBOR | Revolving credit facility | Subsequent event                
Debt Instrument [Line Items]                
Credit agreement, basis spread on variable rate 1.50%              
Line of credit | Maximum | LIBOR | Revolving credit facility | Subsequent event                
Debt Instrument [Line Items]                
Credit agreement, basis spread on variable rate 2.25%              
Line of credit | New Credit Agreement                
Debt Instrument [Line Items]                
Debt face amount   $ 5,000,000            
Outstanding principal       0   0    
Line of credit | Western Alliance Bank                
Debt Instrument [Line Items]                
Maximum borrowing capacity     $ 20,000,000         $ 5,000,000
Credit agreement, basis spread on variable rate     0.50%          
Credit agreement, interest rate floor     6.00%          
Term Loan | New Credit Agreement                
Debt Instrument [Line Items]                
Debt face amount   20,000,000            
Outstanding principal       $ 19,250,000   $ 19,250,000    
Term Loan | New Credit Agreement | Minimum                
Debt Instrument [Line Items]                
Principal payment   250,000            
Term Loan | New Credit Agreement | Maximum                
Debt Instrument [Line Items]                
Principal payment   $ 1,250,000