Quarterly report pursuant to Section 13 or 15(d)

Note Payable, net - Additional Information (Details)

v3.21.1
Note Payable, net - Additional Information (Details) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Apr. 29, 2020
Apr. 20, 2020
Aug. 30, 2020
Dec. 31, 2016
Mar. 31, 2021
Dec. 31, 2020
Aug. 31, 2020
Debt Instrument [Line Items]              
Note payable, net         $ 1,990,000    
Cash         49,539,000 $ 12,862,000  
Unsecured debt              
Debt Instrument [Line Items]              
Note payable, net         1,086,000    
Received net proceeds   $ 1,086,000          
Interest rate   1.00%          
Debt term   2 years          
Loan Agreement              
Debt Instrument [Line Items]              
Received loan       $ 7,000,000      
Deferral principal payment period 3 months            
Payment for Debt Extinguishment or Debt Prepayment Cost         $ 1,512,000    
Effective rate           8.49%  
PWB Loan Agreement | Term Loan              
Debt Instrument [Line Items]              
Received loan             $ 2,000
Effective rate         4.70%    
Line Of Credit Facility, Capacity Available For Specific Purpose         $ 480,000    
Note payable, net         $ 2,000,000    
Interest rate             4.50%
LIBOR | Loan Agreement              
Debt Instrument [Line Items]              
Variable rate percentage       5.41%      
Prime Rate | PWB Loan Agreement | Term Loan              
Debt Instrument [Line Items]              
Variable rate percentage     0.50%