LEASES - Schedule of Components of Leases (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Assets:
Operating	$ 6,169	$ 5,171
Finance	3,527	4,296
Total ROU assets	9,696	9,467
Current Liabilities:
Operating	$ 1,094	$ 1,182
Operating Lease Liability Current Statement Of Financial Position [Extensible List]	Accounts payable and accrued liabilities	Accounts payable and accrued liabilities
Finance	$ 1,857	$ 1,416
Long-term
Operating	$ 5,190	$ 3,441
Operating Lease Liability Noncurrent Statement Of Financial Position [Extensible List]	Other long-term liabilities	Other long-term liabilities
Finance	$ 1,287	$ 2,592
Total lease liabilities	$ 9,428	$ 8,631