GOODWILL AND INTANGIBLES - Additional Information (Detail) - USD ($)		12 Months Ended
	Jul. 17, 2017	Dec. 31, 2020	Dec. 31, 2019
Schedule Of Goodwill And Intangible Assets [Line Items]
Goodwill		$ 1,702,000	$ 1,702,000
Intangible asset amortization		67,000	67,000
Impairments of goodwill recognized		0	0
General and Administrative Expense
Schedule Of Goodwill And Intangible Assets [Line Items]
Intangible asset amortization		$ 100,000	$ 100,000
Customer Relationships
Schedule Of Goodwill And Intangible Assets [Line Items]
Amortization period of intangible assets		4 years
Comstock Environmental
Schedule Of Goodwill And Intangible Assets [Line Items]
Purchase price of business assets	$ 2,300,000