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Related Party Transactions - Additional Information (Detail)			3 Months Ended		9 Months Ended
	Jul. 01, 2019 USD ($)	Apr. 30, 2019 USD ($) Installment	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	May 23, 2018 USD ($) $ / shares shares	Dec. 29, 2015 USD ($)
Related Party Transaction [Line Items]
Credit facility outstanding								$ 5,000,000
Future minimum lease payments			$ 569,000		$ 569,000
Total rental payments made under lease agreement			$ 153,000	$ 163,000	$ 452,000	$ 381,000
Comstock Growth Fund II, L.C. [Member] | Notes Payable, Other Payables [Member] | Note Exchange Agreement [Member]
Related Party Transaction [Line Items]
Credit facility outstanding							$ 3,700,000
Comstock Growth Fund II, L.C. [Member] | Comstock Growth Fund II, L.C. [Member]
Related Party Transaction [Line Items]
Debt instrument, initial principal amount								$ 5,000,000
Series C- Non Convertible Preferred Stock [Member] | Comstock Growth Fund II, L.C. [Member] | Notes Payable, Other Payables [Member] | Note Exchange Agreement [Member]
Related Party Transaction [Line Items]
Convertible preferred shares issued upon conversion | shares							738,390
Preferred stock par value per share | $ / shares							$ 0.01
Series C Preferred Stock [Member] | Comstock Growth Fund II, L.C. [Member] | Notes Payable, Other Payables [Member] | Note Exchange Agreement [Member]
Related Party Transaction [Line Items]
Preferred stock liquidation value per share | $ / shares							$ 5.00
Business Management Agreement [Member] | Investors X [Member]
Related Party Transaction [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
Business Management Agreement [Member] | CDS [Member]
Related Party Transaction [Line Items]
Annual management fee payable	$ 337,500
Maximum reimbursable expenses of manager per month	$ 15,000

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