Quarterly report pursuant to Section 13 or 15(d)

Accrued Expenses - Changes in Accrued Warranty Obligations (Details)

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Accrued Expenses - Changes in Accrued Warranty Obligations (Details)
9 Months Ended
Sep. 30, 2021
USD ($)
Accrued Expenses  
Accrued Warranty Obligations, beginning of period $ 143,898
Reductions for Settling Warranties (239,534)
Warranties Issued During Period 289,728
Accrued Warranty Obligations, end of period $ 194,092