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Note A - Organization and Summary of Significant Accounting Policies (Details Textual) $ / shares in Units, € in Millions		12 Months Ended
	Aug. 07, 2017 shares	Jun. 30, 2018 USD ($) $ / shares shares	Jun. 30, 2017 USD ($) $ / shares shares	Jun. 30, 2018 EUR (€) shares	Sep. 30, 2017 USD ($)
Foreign Currency Contract, Asset, Fair Value Disclosure		$ 55,000
Foreign Currency Contracts, Liability, Fair Value Disclosure		55,000	$ 521,000
Notes, Loans and Financing Receivable, Net, Current, Total		1,500,000
Investment Income, Interest		1,085,000	459,000
Impairment of Long-Lived Assets to be Disposed of		0	0
Sales Discounts, Noncash		898,000
Royalty and Licensing Revenue		21,400,000	26,900,000
Royalty Expense		854,000	1,000,000
Research and Development Expense, Total		1,500,000	1,600,000
Advertising Expense		2,400,000	598,000
Liability for Uncertainty in Income Taxes, Current		0	$ 0
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount		$ 0
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
Accounts Receivable [Member] \| Customer Concentration Risk [Member]
Concentration of Risk Number of Major Customers		3
Concentration Risk, Percentage		76.60%	65.60%
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| Beta Alanine Raw Material Sale Customers [Member]
Concentration Risk, Percentage		17.30%	21.30%
2009 Omnibus Stock Incentive Plan [Member] \| Board of Directors and Management Members [Member]
Stock Issued During Period, Shares, Restricted Stock Award, Gross \| shares		175,000	155,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Ending Balance \| shares		458,012	319,355	458,012
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options		$ 3,100,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition		2 years 219 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		$ 10.19	$ 8.82
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount \| shares		41,661	0
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		$ 11.30
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
Foreign Exchange Contract [Member]
Derivative, Notional Amount		$ 34,400,000		€ 29
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
Kaged Muscle LLC [Member] \| Notes Receivable [Member]
Notes, Loans and Financing Receivable, Net, Current, Total					$ 1,500,000
Notes, Loans and Financing Receivable, Interest Rate, Stated Percentage					15.00%
Investment Income, Interest		$ 171,000
Juice Plus + [Member]
Agreement, Term	5 years
Juice Plus + [Member] \| Restricted Stock [Member]
Stock Issuance Agreement, Shares Agreed to Grant \| shares	500,000
Sales Discounts, Noncash		898,000
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