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Note F - Income Taxes (Details Textual) - USD ($) | 12 Months Ended
--- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2017
Federal, State and Local Income Tax Expense (Benefit), Gross, Continuing Operations |  | $ 4,400,000 | $ 2,200,000
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability |  | $ 212,000 |
Effective Income Tax Rate Reconciliation, Percent, Total |  | 52.40% | 28.40%
Net Income (Loss) Attributable to Parent, Total |  | $ 5,051,000 | $ 7,235,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  | 28.06% | 34.00%
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Transition Tax Liability |  | $ 1,700,000 |
Undistributed Earnings of Foreign Subsidiaries |  | 0 |
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount |  | 1,100,000 |
Scenario, Forecast [Member] |  |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% |  |
Natural Alternatives International Europe SA [Member] |  |  |
Net Income (Loss) Attributable to Parent, Total |  | 6,000,000 |
State and Local Jurisdiction [Member] |  |  |
Operating Loss Carryforwards, Total |  | $ 3,400,000 |
State and Local Jurisdiction [Member] | Earliest Tax Year [Member] |  |  |
Open Tax Year |  | 2007 |
Domestic Tax Authority [Member] | Earliest Tax Year [Member] | Internal Revenue Service (IRS) [Member] |  |  |
Open Tax Year |  | 2015 |
Foreign Tax Authority [Member] | Natural Alternatives International Europe SA [Member] |  |  |
Effective Income Tax Rate Reconciliation, Percent, Total |  | 20.20% |
Foreign Tax Authority [Member] | Earliest Tax Year [Member] | Swiss Federal Tax Administration (FTA) [Member] |  |  |
Open Tax Year |  | 2015 |

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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to repatriation of foreign earnings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 + Details
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