Quarterly report pursuant to Section 13 or 15(d)

Balance Sheet Accounts - Accrued Expenses (Details)

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Balance Sheet Accounts - Accrued Expenses (Details) - USD ($)
3 Months Ended
Jun. 30, 2021
Mar. 31, 2021
Balance Sheet Accounts    
Accrued personnel costs $ 301,591 $ 371,886
Accrued director fees 158,172 50,672
Accrued commissions 54,117 51,080
Accrued professional fees 65,000 127,211
Accrued warranty costs 29,187 45,936
Accrued other 170,334 113,241
Accrued Liabilities, Current, Total $ 778,401 $ 760,026
Warranty term 1 year