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Note 17 - Concentration of Risk | 3 Months Ended
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Mar. 31, 2026
Notes to Financial Statements |
Concentration Risk Disclosure [Text Block] |
| 17. | Concentration of risk
Credit risk Financial instruments that potentially subject the Company to significant concentrations of credit risk consist primarily of cash and cash equivalents, accounts receivable, and deposits and loans to unrelated parties. As of March 31, 2026, 76% of the Company’s cash and cash equivalents were held by major financial institutions located in China, the remaining 24% was held by financial institutions located in the United States of America. The Company believes that these financial institutions located in China and the United States of America are of high credit quality. For accounts receivable and deposits and loans to unrelated parties, the Company extends credit based on an evaluation of the customer’s or other parties’ financial condition, generally without requiring collateral or other security. In order to minimize the credit risk, the Company delegated a team responsible for credit approvals and other monitoring procedures to ensure that follow-up action is taken to recover overdue debts. Further, the Company reviews the recoverable amount of each individual receivable at each balance sheet date to ensure that adequate allowances are made for doubtful accounts. In this regard, the Company considers that the Company’s credit risk for accounts receivable and deposits and loans to unrelated parties are significantly reduced. Concentration of customers The following tables summarized the information about the Company’s concentration of customers for the three months ended March 31, 2026 and 2025, respectively:
|  | Customer A |  | Customer B |  | Customer C |  | Customer D |  | Customer E |  | Customer F |  | Customer G
Three Months Ended March 31, 2026 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues, customer concentration risk |  | 74% |  | 16% |  | 10% |  | - |  | - |  | - |  | -
Three Months Ended March 31, 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues, customer concentration risk |  | - |  | * |  | - |  | 59% |  | 37% |  | - |  | -
As of March 31, 2026 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts receivable, customer concentration risk |  | 100% |  | - |  | - |  | - |  | - |  | - |  | -
As of December 31, 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts receivable, customer concentration risk |  | - |  | - |  | - |  | - |  | - |  | 78% |  | 22%
* Less than 10%. - No transaction incurred for the reporting period/no balance existed as of the reporting date. Concentration of suppliers The following tables summarized the information about the Company’s concentration of suppliers for the three months ended March 31, 2026 and 2025, respectively:
| Supplier A | Supplier B | Supplier C
Three Months Ended March 31, 2026 |  |  |
Cost of revenues, supplier concentration risk | 75% | - | -
Three Months Ended March 31, 2025 |  |  |
Cost of revenues, supplier concentration risk | - | 59% | 38%
* Less than 10%. - No transaction incurred for the reporting period.

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- Definition The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (d)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-21 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (d)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-21 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (c)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-21 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-21 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-21 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 275 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 3A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482836/275-10-55-3A Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 275 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482861/275-10-50-2A Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 275 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482861/275-10-50-1 Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 275 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/275/tableOfContent + Details
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