Annual report pursuant to Section 13 and 15(d)

Nature of Operations and Summary of Significant Accounting Policies (Details1)

v3.21.1
Nature of Operations and Summary of Significant Accounting Policies (Details1) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-01-01    
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]    
Transaction price allocated to performance obligations   $ 4,688,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period   10 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-01-01    
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]    
Transaction price allocated to performance obligations $ 3,306,000  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 10 years