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Note A - Organization and Summary of Significant Accounting Policies (Details Textual) $ / shares in Units, € in Millions | 12 Months Ended |
--- | --- | ---
Jun. 30, 2017 USD ($) $ / shares shares | Jun. 30, 2016 USD ($) $ / shares shares | Jun. 30, 2017 EUR (€) shares
Foreign Currency Contract, Asset, Fair Value Disclosure | $ 521,000 | $ 250,000 |
Royalty and Licensing Revenue | 26,900,000 | 21,800,000 |
Royalty Expense | 1,000,000 | 865,000 |
Research and Development Expense | 1,600,000 | 1,100,000 |
Advertising Expense | 598,000 | 334,000 |
Liability for Uncertainty in Income Taxes, Current | 0 | 0 |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount | $ 0 | $ 193,000 |
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 | 0 | 0 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value | $ 0 | $ 0 |
Concentration of Risk Number of Major Customers | 3 |  |
Impairment of Long-Lived Assets to be Disposed of | $ 0 | $ 0 |
Accounts Receivable [Member] | Customer Concentration Risk [Member] |  |  |
Concentration Risk, Percentage | 65.60% | 58.70% |
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Beta Alanine Raw Material Sale Customers [Member] |  |  |
Concentration Risk, Percentage | 21.30% | 14.60% |
2009 Omnibus Stock Incentive Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | shares |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period | shares |  |  |
2009 Omnibus Stock Incentive Plan [Member] | Board of Directors and Management Members [Member] |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Gross | shares | 155,000 | 208,000 |
Employee Stock Option [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate | 0.00% |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | shares | 0 |  |
Restricted Stock [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number | shares | 319,335 | 193,012 | 319,335
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options | $ 2,500,000 |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition | 2 years 146 days |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares | $ 8.82 | $ 9.86 |
Restricted Stock [Member] | 2009 Omnibus Stock Incentive Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares | $ 8.82 |  |
Foreign Exchange Contract [Member] |  |  |
Derivative, Notional Amount | $ 26,100,000 |  | € 23.1
Derivative, Remaining Maturity | 1 year 60 days |  |
Minimum [Member] |  |  |
Property, Plant and Equipment, Useful Life | 1 year |  |
Minimum [Member] | Restricted Stock [Member] | 2009 Omnibus Stock Incentive Plan [Member] | Board of Directors and Management Members [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years |  |
Maximum [Member] |  |  |
Property, Plant and Equipment, Useful Life | 39 years |  |
Maximum [Member] | Restricted Stock [Member] | 2009 Omnibus Stock Incentive Plan [Member] | Board of Directors and Management Members [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 5 years |  |
Fair Value, Inputs, Level 1 [Member] |  |  |
Fair Value, Net Asset (Liability) | $ 0 | $ 0 |
Fair Value, Inputs, Level 3 [Member] |  |  |
Fair Value, Net Asset (Liability) | $ 0 | $ 0 |

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