TRADE AND OTHER RECEIVABLES (Additional Information) (Detail)	3 Months Ended
	Mar. 31, 2021 USD ($) DistributionPartner	Mar. 31, 2020 USD ($)
Percent of trade accounts receivable insured	85.00%
Total revenue	$ 29,465,000	$ 40,981,000
Increase in credit losses		600,000
Receivables, written off	$ 0	$ 0
Accounts Receivable [Member]
Number of distribution partner | DistributionPartner	1
Total revenue	$ 3,600,000
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Percentage of Total Account Receivable	10.00%
Sales Revenue [Member] | Customer Concentration Risk [Member]
Percentage of Total Account Receivable	50.00%