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Note 6 - Indebtedness (Details Textual)
$ / shares in Units, $ in Thousands
3 Months Ended 4 Months Ended
Apr. 05, 2021
Mar. 05, 2021
USD ($)
Aug. 12, 2019
USD ($)
$ / shares
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2021
USD ($)
Apr. 30, 2021
Mar. 31, 2021
USD ($)
Senior Secured Credit Agreement [Member]                
Debt Instrument, Term (Year) 4 years              
Debt Instrument, Covenant, Maximum Total Leverage Ratio for the First Four Testing Dates   5.50            
Debt Instrument, Covenant, Maximum Total Leverage Ratio for the Sixth, Seventh, and Eighth Testing Dates   5.0            
Debt Instrument, Covenant, Maximum Conditional Total Leverage Ratio Following an Acquisition   5.75            
Long-term Line of Credit, Total       $ 0   $ 0    
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage           0.15%    
Line of Credit Facility, Commitment Fee Amount       37 $ 0      
Debt Instrument, Covenant, Maximum Total Leverage Ratio Following the Eighth Testing date   4.5            
Senior Secured Credit Agreement [Member] | Prepaid Expenses, Other and Other Assets [Member]                
Debt Issuance Costs, Net, Total       609   $ 609   $ 650
Senior Secured Credit Agreement [Member] | Maximum [Member]                
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage   0.35%            
Senior Secured Credit Agreement [Member] | Maximum [Member] | The Credit Facility Term Loan [Member]                
Line of Credit Facility, Maximum Borrowing Capacity   $ 75,000            
Senior Secured Credit Agreement [Member] | Minimum [Member]                
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage   0.15%            
Fixed Charge Coverage Ratio   1.25            
Senior Secured Credit Agreement [Member] | Minimum [Member] | The Credit Facility Term Loan [Member]                
Line of Credit Facility, Maximum Borrowing Capacity   $ 25,000            
Senior Secured Credit Agreement [Member] | Swingline Loan [Member] | Maximum [Member]                
Line of Credit Facility, Maximum Borrowing Capacity   5,000            
Senior Secured Credit Agreement [Member] | Revolving Credit Facility [Member]                
Line of Credit Facility, Maximum Borrowing Capacity   75,000            
Senior Secured Credit Agreement [Member] | Letter of Credit [Member] | Maximum [Member]                
Line of Credit Facility, Maximum Borrowing Capacity   $ 2,500            
The Notes [Member] | Senior Notes [Member]                
Debt Instrument, Term (Year)     6 years          
Debt Issuance Costs, Net, Total       $ 3,805   $ 3,805   $ 3,328
Debt Instrument, Interest Rate, Stated Percentage     1.375%         1.375%
Debt Instrument, Convertible, Conversion Ratio Per 1,000 Principal     3.5273          
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares     $ 283.50          
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger     130.00%          
Debt Instrument, Convertible, Threshold Trading Days     20          
Debt Instrument, Convertible, Threshold Consecutive Trading Days     30          
Debt Instrument, Convertible, Consecutive Trading Days, Trading Price Per 1,000 Principal of Notes Less Than 98% of the Product     10          
Debt Instrument, Unamortized Discount and Commissions Including Equity Component     $ 5,175          
Third Party Offering Costs     $ 255          
Debt Instrument, Interest Rate, Effective Percentage       1.90%   1.90% 5.50%