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Schedule II - Valuation and Qualifying Accounts - Valuation and Qualifying Accounts (Details) - USD ($)		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Balance Beginning of Year		$ 1,277,742	$ 2,083,567
Charges to Costs and Expenses		586,291	152,337
Deductions	[1]	(642,040)	(958,162)
Balance End of Year		1,221,993	1,277,742
SEC Schedule, 12-09, Reserve, Inventory [Member]
Balance Beginning of Year		665,308	1,111,795
Charges to Costs and Expenses		266,021	127,293
Deductions	[1]	(207,380)	(573,780)
Balance End of Year		723,949	665,308
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
Balance Beginning of Year		612,434	971,772
Charges to Costs and Expenses		320,270	25,044
Deductions	[1]	(434,660)	(384,382)
Balance End of Year		$ 498,044	$ 612,434
[1] Includes write-offs, the impact of foreign currency exchange rates.

X

- 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

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X

- Definition

Amount of increase in valuation and qualifying accounts and reserves from charge to cost and expense.

+ 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 C)(1))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690

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- Definition

Amount of decrease in 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 D))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690

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