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Product Warranty Provisions (Tables)
12 Months Ended
Dec. 31, 2021
Product Warranties Disclosures [Abstract]  
Schedule of accrued warranty activity
   December 31,
2020
   December 31,
2021
 
Balance at beginning of year  $2,246,933   $1,991,605 
Warranty costs incurred   (395,864)   (34,439)
Provision for the year   12,998    16,995 
Foreign exchange adjustment   (127,538)   54,105 
Balance at end of year   1,991,605    2,028,266 
Less: Current portion   (155,888)   (127,837)
Non-current portion  $1,835,717   $1,900,429