Debt instrument floor interest rate.

No definition available.

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- Definition

Debt instrument interest rate payable on maturity.

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No definition available.

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Debt instrument interest rate payable on monthly basis.

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Debt Instrument Maturity Description

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Debt instrument maturity month year range end.

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Debt instrument maturity month year range start.

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Line of credit extension period.

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- Definition

Number of promissory notes outstanding.

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- Definition

Number Of Secured Loan

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

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No definition available.

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- Definition

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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The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

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No definition available.

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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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Description of the payment terms of the debt instrument (for example, whether periodic payments include principal and frequency of payments) and discussion about any contingencies associated with the payment.

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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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No definition available.

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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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No definition available.

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Weighted average interest rate of debt outstanding.

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No definition available.

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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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Date the credit facility terminates, in CCYY-MM-DD format.

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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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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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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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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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Amount of collateralized debt obligations classified as other.

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Debt - Additional Information (Detail)			3 Months Ended		12 Months Ended
Debt - Additional Information (Detail)	Dec. 29, 2015 USD ($)	Oct. 17, 2014 USD ($)	Mar. 31, 2018 USD ($) SecurityLoan Promissory_Notes	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($) SecurityLoan Promissory_Notes	Dec. 18, 2014 USD ($)
Line of Credit Facility [Line Items]
Credit facilities and project related loans scheduled to mature during the remainder of 2018			$ 29,391,000
Outstanding secured debt			22,890,000		$ 23,215,000
Secured - other			1,061,000		1,069,000
Outstanding borrowings and accrued interest, net of discounts			$ 15,346,000		$ 14,893,000
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			12.40%		11.90%
Outstanding borrowings and accrued interest, net of discounts			$ 11,700,000
Interest payments			$ 100,000	$ 400,000
Unsecured Seller-financed Promissory Note [Member]
Line of Credit Facility [Line Items]
Interest rate for period			4.88%		4.56%
Debt instrument, gross			$ 700,000		$ 700,000
Number of unsecured seller-financed promissory notes outstanding \| Promissory_Notes			2		2
Commercial Paper One [Member] \| Unsecured Seller-financed Promissory Note [Member]
Line of Credit Facility [Line Items]
Interest rate			9.75%		9.50%
Debt instrument maturity date			Feb. 27, 2020
Debt instrument, gross			$ 100,000		$ 100,000
Commercial Paper One [Member] \| Prime Rate [Member] \| Unsecured Seller-financed Promissory Note [Member]
Line of Credit Facility [Line Items]
Debt instrument spread variable rate			5.00%
Commercial Paper Two [Member] \| Unsecured Seller-financed Promissory Note [Member]
Line of Credit Facility [Line Items]
Debt instrument maturity date			Jul. 17, 2022
Debt instrument, gross			$ 600,000		600,000
Commercial Paper Two [Member] \| LIBOR Rate [Member] \| Unsecured Seller-financed Promissory Note [Member]
Line of Credit Facility [Line Items]
Debt instrument spread variable rate			3.00%
Construction Loans [Member] \| Construction Revolvers [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity			$ 24,800,000		24,700,000
Unused construction loan commitments			$ 19,100,000		$ 17,500,000
Debt instrument, interest rate description			Interest rates charged under these facilities include the London Interbank Offered Rate (“LIBOR”) and prime rate pricing options, subject to minimum interest rate floors.
Weighted average interest rate			4.80%		4.60%
Outstanding secured debt			$ 5,700,000		$ 7,200,000
Maturity range, start date			2018-05
Maturity range, end date			2019-04
Debt instrument, gross			$ 5,682,000		7,237,000
Development and Acquisition Notes [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity			$ 26,500,000		$ 26,500,000
Weighted average interest rate			6.30%		7.10%
Outstanding secured debt			$ 10,700,000		$ 9,500,000
Maturity range, start date			2018-05
Maturity range, end date			2019-06
Debt instrument, gross			$ 10,719,000		9,533,000
Development and Acquisition Notes [Member] \| Minimum [Member] \| LIBOR and Prime Rate Pricing Options [Member]
Line of Credit Facility [Line Items]
Interest rate floor			4.50%
Development and Acquisition Notes [Member] \| Maximum [Member] \| LIBOR and Prime Rate Pricing Options [Member]
Line of Credit Facility [Line Items]
Interest rate floor			12.00%
First and Second and Mezzanine Notes [Member]
Line of Credit Facility [Line Items]
Outstanding secured debt			$ 1,300,000		1,300,000
Credit facility outstanding			$ 1,100,000
Interest rate			12.00%
Interest rate paid on a monthly basis			6.00%
Interest rate accrued and paid on maturity			6.00%
Debt instrument maturity date			Jun. 30, 2018
First and Second and Mezzanine Notes [Member] \| Line of Credit [Member]
Line of Credit Facility [Line Items]
Outstanding secured debt			$ 2,000,000		2,000,000
Credit facility outstanding			$ 2,000,000
Interest rate			12.00%
Debt instrument maturity date			Sep. 30, 2018
Line of Credit [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity			$ 3,000,000		3,000,000
Outstanding secured debt			$ 2,100,000		$ 2,100,000
Interest rate floor			5.00%
Interest rate for period			5.13%		5.00%
Debt instrument maturity description			This line of credit is secured by the first priority security interest in the Company’s wholly owned subsidiaries’ in the Washington, D.C. metropolitan area and guaranteed by our Chief Executive Officer. The Company uses this line of credit to finance the predevelopment related expenses and deposits for current and future projects and bears a variable interest rate tied to a one-month LIBOR plus 3.25% per annum, with an interest rate floor of 5.0%.
Line of credit maturity date			Jun. 30, 2018
Debt instrument, gross			$ 2,128,000		$ 2,123,000
Line of Credit [Member] \| LIBOR Rate [Member]
Line of Credit Facility [Line Items]
Debt instrument spread variable rate			3.25%
Secured Other [Member]
Line of Credit Facility [Line Items]
Debt instrument maturity date			Oct. 17, 2022
Number of secured loan \| SecurityLoan			1		1
Secured - other			$ 1,000,000		$ 1,100,000
Fixed interest rate			6.00%
Unsecured Note [Member]
Line of Credit Facility [Line Items]
Debt instrument, interest rate description			LIBOR
Interest rate			3.90%		3.60%
Debt instrument maturity date			Dec. 28, 2018
Debt instrument, gross			$ 500,000		$ 600,000
Debt instrument, term			10 years
Unsecured Note [Member] \| LIBOR Rate [Member]
Line of Credit Facility [Line Items]
Debt instrument spread variable rate			2.20%
Notes Payable, Other Payables [Member] \| Comstock Growth Fund [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 20,000,000				$ 25,000,000
Debt instrument, interest rate description			LIBOR
Interest rate floor		10.00%
Debt instrument maturity date			Apr. 16, 2018
Debt instrument, term		3 years
Debt instrument, initial principal amount		$ 10,000,000
Loan annual principal repayment, percentage		10.00%
Principal payments to CGF			$ 0	$ 0
Notes Payable, Other Payables [Member] \| Comstock Growth Fund II, L.C. [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 10,000,000
Credit facility outstanding	$ 5,000,000
Debt instrument, term	2 years
Outstanding borrowings and accrued interest, net of discounts			$ 3,700,000		3,600,000
Line of credit facility additional extension period	1 year
Debt instrument, interest rate	10.00%
Debt instrument, interest payment terms			Interest payments will be accrued and paid in kind monthly for the first year, and then paid current monthly in arrears beginning December 31, 2016
Notes Payable, Other Payables [Member] \| LIBOR Rate [Member] \| Comstock Growth Fund [Member]
Line of Credit Facility [Line Items]
Debt instrument spread variable rate		9.75%
Unsecured Notes Payable To Affiliate [Member] \| Comstock Growth Fund [Member]
Line of Credit Facility [Line Items]
Outstanding borrowings and accrued interest, net of discounts			$ 11,700,000		$ 11,300,000