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Note A - Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2017 USD ($) | Aug. 07, 2017 shares | Sep. 30, 2018 USD ($) shares | Sep. 30, 2017 USD ($) shares | Jun. 30, 2018 USD ($)
Sales Discounts, Noncash |  |  | $ 245,000 | $ 163,000 |
Royalty and Licensing Revenue |  |  | 5,400,000 | 5,900,000 |
Royalty Expense |  |  | 263,000 | 284,000 |
Notes, Loans and Financing Receivable, Net, Current, Total |  |  | 1,500,000 |  | $ 1,500,000
Investment Income, Interest |  |  | $ 555,000 | $ 250,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | shares |  |  | 0 | 0 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period | shares |  |  | 5,000 | 0 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period | shares |  |  | 0 | 0 |
Allocated Share-based Compensation Expense, Total |  |  | $ 409,000 | $ 301,000 |
Foreign Currency Contract, Asset, Fair Value Disclosure |  |  | $ 1,000,000 |  | 55,000
Foreign Currency Contracts, Liability, Fair Value Disclosure |  |  |  |  | $ 55,000
Customer Concentration Risk [Member] | Accounts Receivable [Member] |  |  |  |  |
Concentration of Risk Number of Major Customers |  |  | 3 |  |
Concentration Risk, Percentage |  |  | 67.60% |  | 76.60%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Beta Alanine Raw Material Sale Customers [Member] |  |  |  |  |
Concentration Risk, Percentage |  |  | 20.40% |  | 17.30%
Fair Value, Inputs, Level 1 [Member] |  |  |  |  |
Fair Value, Net Asset (Liability), Total |  |  | $ 0 |  | $ 0
Fair Value, Inputs, Level 3 [Member] |  |  |  |  |
Fair Value, Net Asset (Liability), Total |  |  | 0 |  | $ 0
Juice Plus + [Member] |  |  |  |  |
Agreement, Term |  | 5 years |  |  |
Kaged Muscle LLC [Member] | Notes Receivable [Member] |  |  |  |  |
Notes, Loans and Financing Receivable, Term | 1 year |  |  |  |
Notes, Loans and Financing Receivable, Net, Current, Total | $ 1,500,000 |  |  | $ 1,500,000 |
Notes, Loans and Financing Receivable, Extension Fee |  |  | 25,000 |  |
Notes, Loans and Financing Receivable, Interest Rate, Stated Percentage | 15.00% |  |  | 15.00% |
Investment Income, Interest |  |  | $ 58,000 | $ 0 |
Restricted Stock [Member] |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | shares |  |  | 15,000 | 0 |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | shares |  |  | 15,000 | 0 |
Restricted Stock [Member] | Juice Plus + [Member] |  |  |  |  |
Stock Issuance Agreement, Shares Agreed to Grant | shares |  | 500,000 |  |  |
Sales Discounts, Noncash |  |  | $ 245,000 | $ 163,000 |
Employee Stock Option [Member] |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | shares |  |  | 0 | 0 |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate |  |  | 0.00% |  |

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