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Note A - Organization and Summary of Significant Accounting Policies (Details Textual) $ / shares in Units, € in Millions									1 Months Ended				3 Months Ended	12 Months Ended
	Mar. 19, 2015 shares	Mar. 07, 2014 shares	Jul. 01, 2013 USD ($)	Jun. 01, 2013 USD ($)	Dec. 01, 2012 USD ($)	Oct. 03, 2012 USD ($)	Jul. 12, 2012 USD ($)	Mar. 13, 2012 USD ($)	Mar. 31, 2014 USD ($)	Mar. 31, 2012 USD ($)	Jan. 31, 2012 USD ($)	Jun. 30, 2011 USD ($)	Sep. 30, 2013 shares	Jun. 30, 2015 USD ($) $ / shares shares	Jun. 30, 2014 USD ($) $ / shares shares	Jun. 30, 2013 shares	Jun. 30, 2015 EUR (€) shares	Jun. 30, 2015 USD ($) shares	Dec. 01, 2013 USD ($)
Amendment [Member]
Proceeds from License Fees Received			$ 150,000	$ 204,167	$ 204,167		$ 354,167	$ 354,167
Additional License Fees Upon Achievement of Certain Milestones									$ 2,800,000
Additional License Fees Receivable Upon Achievement of Certain Milestones																			$ 150,000
Prior to Amendment [Member]
Additional License Fees Upon Achievement of Certain Milestones										$ 4,300,000
Additional License Fees Receivable Upon Achievement of Certain Milestones										$ 708,334
Installment [Member]
Number of Installment Payments									4	6
Fair Value, Inputs, Level 1 [Member]
Fair Value, Net Asset (Liability)																		$ 0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Asset (Liability)															$ 0
Minimum [Member]
Property, Plant and Equipment, Useful Life														1 year
Maximum [Member]
Property, Plant and Equipment, Useful Life														39 years
Foreign Exchange Contract [Member]
Derivative, Notional Amount																	€ 23.8	$ 27,100,000
Derivative, Remaining Maturity														1 year 60 days
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate														0.00%
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 \| shares														105,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period \| shares														0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value \| $ / shares														$ 5.51
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number \| shares															29,720		93,866	93,866
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options																		$ 945,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition														2 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value \| $ / shares														$ 5.51	$ 5.56
2009 Omnibus Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross \| shares														0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period \| shares														0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period \| shares	105,000	105,000														98,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years															3 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period \| shares													10,000
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| Beta Alanine Raw Material Sale Customers [Member]
Concentration Risk, Percentage														26.00%
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| CSI [Member]
Concentration Risk, Percentage															23.60%
Accounts Receivable [Member] \| Customer Concentration Risk [Member]
Concentration Risk, Percentage														28.50%	26.90%
Proceeds from License Fees Received						$ 150,000					$ 300,000	$ 300,000
Impairment of Long-Lived Assets to be Disposed of														$ 417,000	$ 0
Liability for Uncertain Tax Positions, 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	$ 121,000
Foreign Currency Contract, Asset, Fair Value Disclosure																		$ 474,000
Foreign Currency Contracts, Liability, Fair Value Disclosure															24,000
Royalty and Licensing Revenue														9,100,000	5,400,000
Royalty Expense														806,000	722,000
Research and Development Expense														1,100,000	1,000,000
Advertising Expense														$ 69,000	$ 131,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount \| shares														151,000	268,000
Concentration of Risk Number of Major Customers														2