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Schedule II - Valuation and Qualifying Accounts - Valuation and Qualifying Accounts (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Balance Beginning of Year |  | $ 1,221,993 | $ 1,277,742
Charges to Costs and Expenses |  | 134,152 | 586,291
Deductions | [1] | (678,598) | (642,040)
Balance End of Year |  | 677,546 | 1,221,993
SEC Schedule, 12-09, Reserve, Inventory [Member] |  |  |
Balance Beginning of Year |  | 723,949 | 665,308
Charges to Costs and Expenses |  | 162,651 | 266,021
Deductions | [1] | (618,129) | (207,380)
Balance End of Year |  | 268,470 | 723,949
SEC Schedule, 12-09, Allowance, Credit Loss [Member] |  |  |
Balance Beginning of Year |  | 498,044 | 612,434
Charges to Costs and Expenses |  | (28,499) | 320,270
Deductions | [1] | (60,469) | (434,660)
Balance End of Year |  | $ 409,076 | $ 498,044
[1] | Includes write-offs, the impact of foreign currency exchange rates.

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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column B)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column E)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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