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Related Party Transactions - Additional Information (Detail)
3 Months Ended
Apr. 10, 2020
Mar. 19, 2020
USD ($)
Dec. 30, 2019
USD ($)
Apr. 30, 2019
USD ($)
Installment
$ / ft²
Jan. 02, 2019
Property
Mar. 31, 2020
USD ($)
Property
Mar. 31, 2019
USD ($)
Mar. 27, 2020
USD ($)
Feb. 07, 2020
Dec. 31, 2018
USD ($)
Related Party Transaction [Line Items]                    
Future minimum lease payments           $ 277,000        
Comstock Partners, L.C. [Member]                    
Related Party Transaction [Line Items]                    
Acquisition fee received     $ 500,000              
Comstock Asset Management, L.C. [Member]                    
Related Party Transaction [Line Items]                    
Total rental payments made under lease agreement           $ 142,000 $ 138,000      
Fixed annual payment                   $ 1,000,000
Comstock Asset Management, L.C. [Member] | 2019 Amended Asset Management Agreement [Member]                    
Related Party Transaction [Line Items]                    
Cumulative, compounded, preferred return rate       8.00%            
Leasing fee per square foot for new leases | $ / ft²       1.00            
Leasing fee per square foot for renewal leases | $ / ft²       0.50            
Comstock Asset Management, L.C. [Member] | 2019 Amended Asset Management Agreement [Member] | Incentive Fee [Member]                    
Related Party Transaction [Line Items]                    
Percentage of free cash flow from real estate assets       10.00%            
Comstock Asset Management, L.C. [Member] | 2019 Amended Asset Management Agreement [Member] | Investment Origination Fee [Member]                    
Related Party Transaction [Line Items]                    
Percentage of raised capital       1.00%            
CDS [Member] | Revolving Capital Line of Credit Agreement [Member]                    
Related Party Transaction [Line Items]                    
Debt instrument, term   5 years                
Debt instrument maturity date from initial date   12 months                
CDS [Member] | Revolving Capital Line of Credit Agreement [Member] | Secured Financing [Member]                    
Related Party Transaction [Line Items]                    
Capital line of credit   $ 10,000,000                
Capital line of credit drawn               $ 5,500,000    
CDS [Member] | WSJ Prime Rate [Member] | Revolving Capital Line of Credit Agreement [Member]                    
Related Party Transaction [Line Items]                    
Debt instrument spread variable rate   1.00%                
CDS [Member] | Residential Property Management Agreements [Member]                    
Related Party Transaction [Line Items]                    
Number of property into agreement | Property           2        
Property management agreements initial term           1 year        
Property management agreements renewal term           1 year        
CDS [Member] | Construction Management Agreement [Member]                    
Related Party Transaction [Line Items]                    
Number of property into agreement | Property         2          
CDS [Member] | Construction Management Agreement [Member] | Minimum [Member]                    
Related Party Transaction [Line Items]                    
Percentage of construction management fee         1.00%          
CDS [Member] | Construction Management Agreement [Member] | Maximum [Member]                    
Related Party Transaction [Line Items]                    
Percentage of construction management fee         4.00%          
CDS [Member] | 2019 Amended Asset Management Agreement [Member]                    
Related Party Transaction [Line Items]                    
Fixed annual payment       $ 1,000,000            
Agreement extended termination date       Dec. 31, 2027            
Agreement additional extension term       1 year            
Agreement notice period required for non-renewal       180 days            
CDS [Member] | 2019 Amended Asset Management Agreement [Member] | Asset Management Fee [Member]                    
Related Party Transaction [Line Items]                    
Percentage of CRE portfolio revenues       2.50%            
CDS [Member] | 2019 Amended Asset Management Agreement [Member] | Construction Management Fee [Member]                    
Related Party Transaction [Line Items]                    
Percentage of all costs associated with portfolio projects in development       4.00%            
CDS [Member] | 2019 Amended Asset Management Agreement [Member] | Property Management Fee [Member]                    
Related Party Transaction [Line Items]                    
Percentage of CRE portfolio revenues       1.00%            
CDS [Member] | 2019 Amended Asset Management Agreement [Member] | Acquisition Fee [Member]                    
Related Party Transaction [Line Items]                    
Maximum percentage of purchase price of an acquired asset       0.50%            
CDS [Member] | 2019 Amended Asset Management Agreement [Member] | Disposition Fee [Member]                    
Related Party Transaction [Line Items]                    
Percentage sales price of an asset on disposition       0.50%            
Comstock Investors X [Member] | Business Management Agreement [Member]                    
Related Party Transaction [Line Items]                    
Aggregate fee payable       $ 937,500            
Number of installments of fee payment | Installment       15            
Aggregate fee payable, frequency of periodic payment           quarterly        
Fee payable in installments       $ 62,500            
Hartford Investment [Member]                    
Related Party Transaction [Line Items]                    
Initial investment related to the purchase     $ 1,200,000              
Percentage of ownership interest                 2.50%  
DWC Operating Agreement [Member]                    
Related Party Transaction [Line Items]                    
Percentage of membership interest owned by company and partners                 100.00%  
Comstock Growth Fund [Member]                    
Related Party Transaction [Line Items]                    
Debt Instrument retired description           On March 27, 2020 the Company borrowed $5.5 million under the Revolver.        
Comstock Growth Fund [Member] | Subsequent Events [Member]                    
Related Party Transaction [Line Items]                    
Loan annual principal repayment, percentage 10.00%                  
Debt instrument maturity date 2020