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v3.21.2

Major Customers and Vendors (Details) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2021 item customer | Sep. 30, 2020 customer item | Sep. 30, 2021 customer item | Sep. 30, 2020 customer item | Dec. 31, 2020
Purchases | Vendor concentration risk |  |  |  |  |
Significant Customers and Vendors |  |  |  |  |
Number of vendors | item | 2 | 2 | 2 | 2 |
Purchases | Vendor concentration risk | Major vendor one |  |  |  |  |
Significant Customers and Vendors |  |  |  |  |
Percentage of concentration risk | 20.00% | 21.00% | 20.00% | 20.00% |
Purchases | Vendor concentration risk | Major vendor two |  |  |  |  |
Significant Customers and Vendors |  |  |  |  |
Percentage of concentration risk | 9.00% | 12.00% | 9.00% | 9.00% |
Net sales | Customer concentration risk |  |  |  |  |
Significant Customers and Vendors |  |  |  |  |
Number of customers | customer | 2 | 2 | 2 | 2 |
Net sales | Customer one | Customer concentration risk |  |  |  |  |
Significant Customers and Vendors |  |  |  |  |
Percentage of concentration risk | 21.00% | 22.00% | 22.00% | 26.00% |
Net sales | Customer two | Customer concentration risk |  |  |  |  |
Significant Customers and Vendors |  |  |  |  |
Percentage of concentration risk | 18.00% | 12.00% | 17.00% | 14.00% |
Net accounts receivable | Customer one | Customer concentration risk |  |  |  |  |
Significant Customers and Vendors |  |  |  |  |
Percentage of concentration risk |  |  | 16.00% |  | 19.00%
Net accounts receivable | Customer two | Customer concentration risk |  |  |  |  |
Significant Customers and Vendors |  |  |  |  |
Percentage of concentration risk |  |  | 15.00% |  | 9.00%

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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=120311839&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=121572278&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=121572278&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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