Quarterly report pursuant to Section 13 or 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - Schedule of deferred warranty activity

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - Schedule of deferred warranty activity - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Schedule of deferred warranty activity [Abstract]    
Balance at beginning of period $ 378,850 $ 20,631
Additions 150,543 397,269
Transfer to revenue (203,634) (39,050)
Balance at end of period $ 325,759 $ 378,850