XML 29 R19.htm IDEA: XBRL DOCUMENT v3.21.2
Summary of Significant Accounting Policies (Details) - USD ($)
Sep. 30, 2021
Dec. 31, 2020
Summary of Significant Accounting Policies    
Cash and cash equivalents $ 3,649,000 $ 7,128,000
Restricted cash 85,000 0
Total cash, cash equivalents and retricted cash $ 3,734,000 $ 7,128,000