Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Schedule of Future Related to Performance Obligations (Details)

v3.21.1
Summary of Significant Accounting Policies - Schedule of Future Related to Performance Obligations (Details)
Dec. 31, 2020
USD ($)
Extended warranty service $ 67,000
2021 [Member]  
Extended warranty service 47,000
2022 [Member]  
Extended warranty service $ 20,000