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Note 8 - Corporate Debt (Details Textual) | Jan. 06, 2025 USD ($) | Jan. 06, 2023 USD ($) | Jul. 08, 2025 USD ($) | May 31, 2025 USD ($) | May 29, 2025 USD ($) | May 29, 2025 CNY (¥) | Jan. 05, 2025 USD ($) | Aug. 31, 2024 USD ($) | May 31, 2024
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
NTIC China [Member] | Term Loan in May [Member] |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  | $ 1,390,000 | ¥ 10,000,000 |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 2.96% |  |  |  |  |
Long-Term Debt |  |  |  | $ 2,778,125 |  |  |  | $ 2,820,835 |
NTIC China [Member] | Term Loan in April [Member] |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 2.75% |  |  |  |  |
Revolving Credit Facility [Member] | JP Morgan Chase Bank [Member] |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 8,000,000 | $ 10,000,000 | $ 10,000,000 |  |  |  | $ 10,000,000 |  |
Long-Term Line of Credit |  |  |  | $ 7,369,949 |  |  |  | $ 4,291,608 |
CB Floating Rate Floor | 2.50% |  |  |  |  |  |  |  |
Line of Credit Facility, Interest Rate at Period End |  |  |  | 6.65% |  |  |  |  | 7.44%
Debt Instrument, Covenants, Fixed Charge Coverage Ratio | 1.25 |  |  |  |  |  |  |  |
Revolving Credit Facility [Member] | JP Morgan Chase Bank [Member] | Adjusted SOFR Rate Applicable Margin [Member] |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 2.35% | 2.15% |  |  |  |  |  |  |
Revolving Credit Facility [Member] | JP Morgan Chase Bank [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 0.10% |  |  |  |  |  |  |  |
Standby Letters of Credit [Member] | JP Morgan Chase Bank [Member] |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | $ 5,000,000 |  |  |  |  |  |  |

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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482949/835-30-55-8 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69B Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69C -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69C Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482900/835-30-50-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-2 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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