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Note A - Basis of Presentation and Summary of Significant Accounting Policies (Details Textual)
$ in Thousands
3 Months Ended 6 Months Ended
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
USD ($)
shares
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
USD ($)
shares
Jul. 16, 2020
USD ($)
Jun. 30, 2020
USD ($)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)   0   0    
Sales, Royalty and Licensing Revenue | $ $ 2,800 $ 4,300 $ 5,400 $ 7,500    
Royalty Expense | $ $ 100 $ 200 $ 300 $ 400    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares) 100,000 0 100,000 0    
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period (in shares) 30,442   30,442      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period (in shares) 0 0 0 0    
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount | $         $ 1,000  
Deferred Compensation Arrangement with Individual, Number of Payments         3  
Fair Value, Inputs, Level 1 [Member]            
Fair Value, Net Asset (Liability), Total | $ $ 0   $ 0     $ 0
Fair Value, Inputs, Level 3 [Member]            
Fair Value, Net Asset (Liability), Total | $ 0   0     $ 0
Fair Value, Inputs, Level 2 [Member]            
Foreign Currency Contracts, Liability, Fair Value Disclosure | $ $ 3,600   $ 3,600      
Restricted Stock [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) 0 5,000   5,000    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period (in shares) 0 0 0 15,000    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)     0      
Share-based Payment Arrangement, Expense | $ $ 300 $ 500 $ 700 $ 900    
Juice Plus + [Member]            
Sales Discounts, Cash | $ $ 400 $ 400 $ 800 $ 800    
Share-based Payment Arrangement, Option [Member]            
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)     90,000      
Restricted Stock 1 [Member]            
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)     116,658