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Organization and Basis of Presentation - Additional Information (Detail)
Apr. 30, 2019
USD ($)
Installment
Mar. 31, 2019
USD ($)
shares
Feb. 15, 2019
shares
Jan. 01, 2019
USD ($)
Dec. 31, 2018
shares
Organization And Basis Of Presentation [Line Items]          
Capital stock, shares authorized | shares     80,000,000   31,428,571
Lease ROU assets   $ 156,000      
Lease liabilities   $ 156,000      
ASU 2016-02 [Member]          
Organization And Basis Of Presentation [Line Items]          
Lease ROU assets       $ 170,000  
Lease liabilities       $ 170,000  
Subsequent Event [Member] | Business Management Agreement [Member] | Comstock Investors X, L.C. [Member]          
Organization And Basis Of Presentation [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        
Class A [Member]          
Organization And Basis Of Presentation [Line Items]          
Common stock, shares authorized | shares   59,779,750 59,779,750   11,038,071
Series C Preferred Stock [Member]          
Organization And Basis Of Presentation [Line Items]          
Preferred Stock, shares authorized | shares   20,000,000 4,500,000   3,000,000