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Income Taxes, Deferred Tax Assets and Deferred Tax Liabilities (Details) - Schedule of deferred tax assets and liabilities - USD ($) | Mar. 31, 2021 | Dec. 31, 2020
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Deferred tax assets |  |
Deferred tax assets, non-current |  |
Net operating loss carried forward | 30,663,453 | 31,060,254
Valuation allowance | (34,329,297) | (34,760,478)
Deferred tax liabilities, non-current |  |
Trade Accounts Receivable [Member] |  |
Deferred tax assets |  |
Deferred tax assets, non-current | 1,316,433 | 1,354,762
Inventories [Member] |  |
Deferred tax assets |  |
Deferred tax assets, non-current | 593,697 | 575,575
Property, plant and equipment [Member] |  |
Deferred tax assets |  |
Deferred tax assets, non-current | 1,261,434 | 1,271,986
Provision for product warranty [Member] |  |
Deferred tax assets |  |
Deferred tax assets, non-current | $ 494,280 | $ 497,901

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- Definition Amount of valuation allowance of deferred tax asset attributable to deductible temporary differences and carryforward, classified as noncurrent. + References No definition available. + Details
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- Definition Amount, after deferred tax assets, of deferred tax liability attributable to taxable differences, with jurisdictional netting and classified as noncurrent. + References No definition available. + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32632-109319 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319 + Details
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