Debt instrument maturity date from initial date.

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Debt instrument maturity month and year.

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Debt instrument reduced carrying value.

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Debt instrument remaining balance carrying amount.

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Number of promissory notes outstanding.

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Number Of Secured Loans.

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Percentage of membership interest.

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Number of shares issued for each share of convertible preferred stock that is converted.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Face (par) amount of debt instrument at time of issuance.

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The average effective interest rate during the reporting period.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Description of the maturity date of the debt instrument including whether the debt matures serially and, if so, a brief description of the serial maturities.

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Amount of the required periodic payments applied to interest.

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Percentage of principal amount of debt redeemed.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of payable due to an entity that is affiliated with the reporting entity by means of direct or indirect ownership.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of the required periodic payment applied to principal.

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The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

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Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.

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The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share.

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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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Debt - Additional Information (Detail)						3 Months Ended		12 Months Ended
Debt - Additional Information (Detail)	Apr. 10, 2020	Mar. 27, 2020 USD ($)	Mar. 19, 2020 USD ($)	May 23, 2018 USD ($) $ / shares shares	Oct. 17, 2014 USD ($)	Mar. 31, 2020 USD ($) SecurityLoan Promissory_Notes $ / shares	Mar. 31, 2019 USD ($)	Dec. 31, 2020 SecurityLoan	Dec. 31, 2019 USD ($) Promissory_Notes $ / shares	Dec. 18, 2014 USD ($)
Line of Credit Facility [Line Items]
Debt instrument, gross						$ 12,494,000
Outstanding borrowings and accrued interest, net of discounts						$ 11,230,000			$ 5,706,000
Series C Preferred Stock [Member]
Line of Credit Facility [Line Items]
Preferred stock par value per share \| $ / shares						$ 0.01			$ 0.01
Comstock Growth Fund [Member]
Line of Credit Facility [Line Items]
Debt Instrument, description						On March 27, 2020 the Company borrowed $5.5 million under the Revolver.
Interest payments						$ 125,000	$ 125,000
Comstock Growth Fund [Member] \| Subsequent Events [Member]
Line of Credit Facility [Line Items]
Loan annual principal repayment, percentage	10.00%
Debt instrument maturity	2020-04
CDS [Member] \| Revolving Capital Line of Credit Agreement [Member]
Line of Credit Facility [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]
Line of Credit Facility [Line Items]
Debt instrument maturity date		Apr. 30, 2023
Maximum borrowing capacity			$ 10,000,000
Capital line of credit borrowed		$ 5,500,000
WSJ Prime Rate [Member] \| CDS [Member] \| Revolving Capital Line of Credit Agreement [Member]
Line of Credit Facility [Line Items]
Debt instrument spread variable rate			1.00%
Unsecured Seller-financed Promissory Note [Member]
Line of Credit Facility [Line Items]
Debt instrument maturity date						Jul. 17, 2022
Interest rate for period						5.00%			6.00%
Debt instrument, gross						$ 595,000			$ 595,000
Number of unsecured seller-financed promissory note outstanding \| Promissory_Notes						1			1
Long term debt due for maturity dates						$ 50,000
Debt instrument, term						1 year
Debt instrument, balance amount						$ 54,000
Unsecured Seller-financed Promissory Note [Member] \| LIBOR Rate [Member]
Line of Credit Facility [Line Items]
Debt instrument spread variable rate						3.00%
Secured Financing [Member]
Line of Credit Facility [Line Items]
Debt instrument maturity date						Oct. 17, 2022
Number of secured loans \| SecurityLoan						1
Fixed interest rate						6.50%
Secured Financing [Member] \| Scenario, Forecast [Member]
Line of Credit Facility [Line Items]
Number of secured loans \| SecurityLoan								1
Fixed interest rate								6.50%
Secured Loan One [Member]
Line of Credit Facility [Line Items]
Outstanding secured debt						$ 613,000			$ 667,000
Secured Loan Two [Member]
Line of Credit Facility [Line Items]
Outstanding secured debt									27,000
Unsecured Notes Payable To Affiliate [Member] \| Comstock Growth Fund [Member]
Line of Credit Facility [Line Items]
Outstanding borrowings and accrued interest, net of discounts						$ 5,700,000			$ 5,700,000
Notes Payable, Other Payables [Member] \| Comstock Growth Fund [Member]
Line of Credit Facility [Line Items]
Debt instrument maturity date						Apr. 16, 2020
Debt instrument, term					3 years
Maximum borrowing capacity					$ 20,000,000					$ 25,000,000
Debt instrument, initial principal amount					$ 10,000,000
Principal payments to CGF						$ 0	$ 0
Notes Payable, Other Payables [Member] \| Comstock Growth Fund [Member] \| Membership Exchange Agreement [Member]
Line of Credit Facility [Line Items]
Credit facility outstanding				$ 7,700,000
Percentage of membership interest				91.50%
Debt instrument reduction				$ 5,700,000
Debt instrument fixed interest rate				10.00%
Notes Payable, Other Payables [Member] \| Comstock Growth Fund [Member] \| Membership Exchange Agreement [Member] \| Series C- Non Convertible Preferred Stock [Member]
Line of Credit Facility [Line Items]
Convertible preferred shares issued upon conversion \| shares				1,482,300
Preferred stock par value per share \| $ / shares				$ 0.01
Notes Payable, Other Payables [Member] \| Comstock Growth Fund [Member] \| Membership Exchange Agreement [Member] \| Series C Preferred Stock [Member]
Line of Credit Facility [Line Items]
Preferred stock liquidation value per share \| $ / shares				$ 5.00