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Note 19 - Concentration of Risk - Company's Concentration of Customers and Suppliers (Details) | 3 Months Ended | 6 Months Ended | 12 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Customer A [Member] |  |  |  |  |  |  |
Concentration risk |  | 14.00% | [1] |  | 11.00% |  |
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Customer B [Member] |  |  |  |  |  |  |
Concentration risk |  | 12.00% |  |  | 14.00% |  |
Cost Of Sales Total [Member] | Supplier Concentration Risk [Member] | Supplier A [Member] |  |  |  |  |  |  |
Concentration risk |  | 86.00% |  |  | 73.00% |  |
Cost Of Sales Total [Member] | Supplier Concentration Risk [Member] | Supplier B [Member] |  |  |  |  |  |  |
Concentration risk |  |  |  | 81.00% | 12.00% | 78.00% |
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer A [Member] |  |  |  |  |  |  |
Concentration risk |  |  |  |  | 62.00% |  |
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer C [Member] |  |  |  |  |  |  |
Concentration risk |  |  |  |  | 17.00% |  | 28.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer F [Member] |  |  |  |  |  |  |
Concentration risk |  |  |  |  | 10.00% |  |
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer D [Member] |  |  |  |  |  |  |
Concentration risk |  |  |  |  |  |  | 27.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer E [Member] |  |  |  |  |  |  |
Concentration risk | [1] |  |  |  |  |  | 21.00%
[1] | Less than 10%.

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9054-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13531-108611 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13537-108611 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592 + Details
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