XML 50 R28.htm IDEA: XBRL DOCUMENT v3.21.2
Summary of Significant Accounting Policies (Narrative) (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2021
USD ($)
Jun. 30, 2020
Jun. 30, 2021
USD ($)
Segment
Jun. 30, 2020
Summary Of Significant Accounting Policies [Line Items]        
Percentage of revenue specific to customer from net revenue 11.00% 12.00% 10.00% 15.00%
ASC 606 [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Number of reporting segment | Segment     2  
Deferred revenue | $ $ 15,000   $ 15,000  
ASC 606 [Member] | Maximum [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Percentage of service revenue that is recognized over a period of time against total revenue     1.00%