PROPERTY AND EQUIPMENT - Summary of Property and Equipment, Net (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 135,688	$ 65,631
Less: Accumulated depreciation	(14,156)	(8,986)
Property and equipment, net	121,532	56,645
Plant infrastructure [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 34,273	33,944
Plant infrastructure [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	15 years
Plant infrastructure [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	39 years
Miners [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 36,779	10,236
Estimated useful lives	5 years
Miner facility infrastructure [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 14,787	8,791
Estimated useful lives	15 years
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 300	300
Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 948	211
Estimated useful lives	5 years
Software [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 1,130	66
Estimated useful lives	3 years
Coal ash impoundment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 2,135	2,135
Estimated useful lives	4 years
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 6,869	3,989
Miner deposits [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 38,467	$ 5,959