REVENUE - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 28,726	$ 25,317
Transferred over Time
Disaggregation of Revenue [Line Items]
Revenue	28,000	23,300
Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenue	$ 800	$ 2,100