Debt instrument reduced carrying value.

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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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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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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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Amount of the required periodic payments applied to interest.

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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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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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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the remainder of the fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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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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Debt - Additional Information (Detail)			3 Months Ended		6 Months Ended		12 Months Ended
Debt - Additional Information (Detail)	May 23, 2018 USD ($) $ / shares shares	Oct. 17, 2014 USD ($)	Jun. 30, 2019 USD ($) $ / shares	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) SecurityLoan Promissory_Notes $ / shares	Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($) SecurityLoan Promissory_Notes $ / shares	Dec. 29, 2015 USD ($)	Dec. 18, 2014 USD ($)
Line of Credit Facility [Line Items]
Credit facilities or project related loans scheduled to mature during the remainder of 2019			$ 0		$ 0
Outstanding secured debt			804,000		804,000		$ 922,000
Credit facility outstanding								$ 5,000,000
Outstanding borrowings and accrued interest, net of discounts			$ 4,984,000		$ 4,984,000		$ 4,903,000
Series C Preferred Stock [Member]
Line of Credit Facility [Line Items]
Preferred stock par value per share \| $ / shares			$ 0.01		$ 0.01		$ 0.01
Comstock Development Services [Member]
Line of Credit Facility [Line Items]
Credit facility outstanding		$ 10,000,000
Other Purchasers [Member]
Line of Credit Facility [Line Items]
Credit facility outstanding		6,200,000
Comstock Growth Fund [Member]
Line of Credit Facility [Line Items]
Interest rate			10.00%		10.00%		10.00%
Interest payments			$ 100,000	$ 300,000	$ 200,000	$ 300,000
Unsecured Seller-financed Promissory Note [Member]
Line of Credit Facility [Line Items]
Debt instrument maturity date					Jul. 17, 2022
Interest rate for period					5.20%		6.00%
Debt instrument, gross			$ 595,000		$ 595,000		$ 595,000
Number of unsecured seller-financed promissory note outstanding \| Promissory_Notes					1		1
Unsecured Seller-financed Promissory Note [Member] \| 3rd Loan Anniversary [Member]
Line of Credit Facility [Line Items]
Long term debt due for maturity dates					$ 50,000
Unsecured Seller-financed Promissory Note [Member] \| 4th Loan Anniversary [Member]
Line of Credit Facility [Line Items]
Long term debt due for maturity dates					$ 50,000
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					2		2
Fixed interest rate			6.50%		6.50%		6.50%
Secured Loan One [Member]
Line of Credit Facility [Line Items]
Outstanding secured debt			$ 773,000		$ 773,000		$ 874,000
Secured Loan Two [Member]
Line of Credit Facility [Line Items]
Outstanding secured debt			32,000		32,000		34,000
Unsecured Notes Payable To Affiliate [Member] \| Comstock Growth Fund [Member]
Line of Credit Facility [Line Items]
Outstanding borrowings and accrued interest, net of discounts			5,000,000		$ 5,000,000		$ 4,900,000
Notes Payable, Other Payables [Member] \| Comstock Growth Fund [Member]
Line of Credit Facility [Line Items]
Debt instrument maturity date					Apr. 16, 2020
Maximum borrowing capacity		$ 20,000,000							$ 25,000,000
Debt instrument, term		3 years
Debt instrument, initial principal amount		$ 10,000,000
Principal payments to CGF			0	$ 0	$ 0	$ 0
Credit Facilities or Project Related Loans [Member]
Line of Credit Facility [Line Items]
Credit facilities or project related loans scheduled to mature during the remainder of 2019			$ 0		$ 0
Membership Exchange Agreement [Member] \| Notes Payable, Other Payables [Member] \| Comstock Growth Fund [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%
Membership Exchange Agreement [Member] \| Notes Payable, Other Payables [Member] \| Comstock Growth Fund [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
Membership Exchange Agreement [Member] \| Notes Payable, Other Payables [Member] \| Comstock Growth Fund [Member] \| Series C Preferred Stock [Member]
Line of Credit Facility [Line Items]
Preferred stock liquidation value per share \| $ / shares	$ 5.00