Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Schedule of Contract Balances (Details)

v3.21.1
Summary of Significant Accounting Policies - Schedule of Contract Balances (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Accounting Policies [Abstract]    
Receivables, which are included in 'Accounts Receivable' $ 131,000 $ 229,000
Contract liabilities (deferred revenue) $ 67,000 $ 41,000