Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Details Textual)

v3.19.1
Summary of Significant Accounting Policies (Details Textual)
12 Months Ended
Dec. 31, 2018
USD ($)
Segment
Dec. 31, 2017
USD ($)
Segment
Summary of Significant Accounting Policies (Textual)    
Shipping and handling costs $ 20,380 $ 29,262
Warranty liability 24,190 21,935
Warranty expense 7,403 7,784
Research and development costs 258,294 214,112
Advertising costs $ 51,719 $ 41,555
Number of operating segments | Segment 1 1