Credit Facilities - Additional Information (Detail) (USD $) | 3 Months Ended | 12 Months Ended | 0 Months Ended | |
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014 | Oct. 17, 2014 | Mar. 14, 2013 | Dec. 18, 2014 |
Line of Credit Facility [Line Items] | | | | | | |
Maximum borrowing capacity | $5,000,000 | | | | | |
Outstanding secured debt | 28,923,000 | | 28,379,000 | | | |
Debt instrument maturity date | 30-Jun-15 | | | | | |
Line of credit outstanding | 2,400,000 | | | | | |
Debt instrument maturity description | This line of credit bears a variable interest rate tied to a one-month LIBOR plus 3.25% per annum, with an interest rate floor of 5.0% and matures on July 15, 2015 with an extension option for an additional twelve months provided that the Company meets certain conditions. | | | | | |
Unsecured financing for period | 1,935,000 | | 2,064,000 | | | |
Outstanding borrowings for loan | 17,700,000 | | 15,488,000 | | | |
Possible increase in capital from sale of additional interests | | 0 | | | | |
Amortization period of debt discount | 3 years | | | | | |
Debt instrument, initial principal amount | 48,558,000 | | 45,931,000 | | | |
Mark to market gain on derivative liability | 154,000 | | | | | |
Class A [Member] | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Possible increase in capital from sale of additional interests | | 0 | | | | |
Number of warrants issued | 499,000 | | | | | |
Aggregate fair value of warrants issued | 410,000 | | | | 146,000 | |
Comstock Growth Fund [Member] | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Interest rate | 10.00% | | 10.00% | | | |
Outstanding borrowings for loan | 13,600,000 | | | | | |
Comstock Growth Fund [Member] | Private Placement [Member] | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Maximum borrowing capacity | | | | 25,000,000 | | |
Fair value of shares | 1,400,000 | | | | | |
Mark to market gain on derivative liability | 154,000 | | 154,000 | | | |
Comstock Growth Fund [Member] | Class A [Member] | Private Placement [Member] | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Commitment of shares to be granted | 1,500,000 | | | | | |
Comstock Development Services [Member] | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Initial aggregate principal amount up to capital raise | | | | 10,000,000 | | |
Comstock Development Services [Member] | Private Placement [Member] | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Initial aggregate principal amount up to capital raise | | | | 10,000,000 | | |
LIBOR Rate [Member] | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Debt instrument spread variable rate | 3.25% | | | | | |
Floor Rate [Member] | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Debt instrument spread variable rate | 5.00% | | | | | |
Minimum [Member] | Class A [Member] | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Number of common stock outstanding under warrants | | | | 500,000 | | |
Maximum [Member] | Class A [Member] | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Number of common stock outstanding under warrants | | | | 1,000,000 | | |
Maximum [Member] | Comstock Development Services [Member] | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Possible increase in capital from sale of additional interests | | | | 20,000,000 | | |
Notes Payable, Other Payables [Member] | Comstock Growth Fund [Member] | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Maximum borrowing capacity | | | | | | 25,000,000 |
Debt instrument, term | | | | 3 years | | |
Debt instrument, interest rate description | LIBOR | | | | | |
Debt instrument, initial principal amount | | | | 10,000,000 | | |
Debt instrument, maximum amount available for borrowing | | | | 20,000,000 | | |
Debt instrument, interest payments term | Interest payments will be made monthly in arrears. | | | | | |
Principal curtailment requirement, percentage | | | | 10.00% | | |
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% | | |
Notes Payable, Other Payables [Member] | Floor Rate [Member] | Comstock Growth Fund [Member] | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Debt instrument, floor interest rate | | | | 10.00% | | |
Construction Loans [Member] | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Revolving facility outstanding | 6,700,000 | | 6,500,000 | | | |
Construction Loans [Member] | Construction Revolvers [Member] | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Maximum borrowing capacity | 37,500,000 | | 33,400,000 | | | |
Unused loan commitments | 30,800,000 | | 26,900,000 | | | |
Maturity range, start date | 2015-05 | | | | | |
Maturity dates, end date | 2018-03 | | | | | |
Outstanding construction revolving facility | 5.10% | | 5.10% | | | |
Outstanding secured debt | 6,742,000 | | 6,505,000 | | | |
Development and Acquisition Notes [Member] | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Maximum borrowing capacity | 37,800,000 | | 28,000,000 | | | |
Maturity range, start date | 2015-05 | | | | | |
Maturity dates, end date | 2018-03 | | | | | |
Outstanding construction revolving facility | 4.70% | | 4.80% | | | |
Outstanding secured debt | 14,600,000 | | 13,700,000 | | | |
Development and Acquisition Notes [Member] | Minimum [Member] | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Interest rate floors ranging | 4.50% | | | | | |
Development and Acquisition Notes [Member] | Maximum [Member] | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Interest rate floors ranging | 5.75% | | | | | |
Mezzanine Notes One [Member] | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Maximum borrowing capacity | 3,000,000 | | 3,000,000 | | | |
Outstanding secured debt | 3,000,000 | | 3,000,000 | | | |
Number of secured mezzanine loans | 3 | | 3 | | | |
Fixed interest rate | 13.50% | | | | | |
Debt instrument maturity date | 22-Sep-15 | | | | | |
Mezzanine Notes Two And Three [Member] | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Maximum borrowing capacity | 3,200,000 | | 3,200,000 | | | |
Revolving facility outstanding | 2,200,000 | | 2,800,000 | | | |
Debt instrument maturity date | 22-Jun-15 | | | | | |
Interest rate | 12.00% | | | | | |
Interest rate paid on a monthly basis | 6.00% | | | | | |
Interest rate accrued and paid on maturity | 6.00% | | | | | |
Line of credit maturity date | 15-Jul-15 | | | | | |
Unsecured Note [Member] | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Debt instrument maturity date | 28-Dec-18 | | | | | |
Interest rate | 2.40% | | 2.40% | | | |
Debt instrument spread variable rate | 2.20% | | | | | |
Debt instrument, term | 10 years | | | | | |
Debt instrument, interest rate description | LIBOR plus 2.2% | | | | | |
Due to Affiliate [Member] | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Debt instrument maturity date | 20-Jul-13 | | | | | |
Interest rate | 3.70% | | 3.60% | | | |
Debt instrument spread variable rate | 3.00% | | | | | |
Debt instrument, interest rate description | LIBOR plus 3% | | | | | |
Extended maturity date | 1-Jan-16 | | | | | |
Monthly payment for accrued unpaid interest and principal | | | | | 50,000 | |
Outstanding borrowings for loan | 4,100,000 | | 4,200,000 | | | |
Due to Affiliate [Member] | Comstock Growth Fund [Member] | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Outstanding borrowings for loan | $13,600,000 | | $11,300,000 | | | |