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)
3 Months Ended
Mar. 31, 2020
USD ($)
Accrued Expenses  
Accrued Warranty Obligation $ 98,893
Reductions for Settling Warranties (17,122)
Warranties Issued During Period 17,344
Accrued Warranty Obligations $ 99,115