Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Details 2)

v3.20.1
Summary of Significant Accounting Policies (Details 2) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Accounting Policies [Abstract]    
Balance at beginning of year $ 24,190 $ 21,935
Increase in estimated warranty liability 4,650 7,403
Warranty expenses incurred (1,907) (5,148)
Balance at end of year $ 26,933 $ 24,190