Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Details)

v3.19.1
Summary of Significant Accounting Policies (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Accounting Policies [Abstract]    
Balance at beginning of year $ 21,935 $ 14,251
Increase in estimated warranty liability 7,403 7,784
Warranty expenses incurred (5,148) (100)
Balance at end of year $ 24,190 $ 21,935