DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS - Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Liabilities:
Liability for private warrants	$ 8,268	$ 13,614
Carrying Amount | Fair Value, Recurring
Assets:
Cash and cash equivalents	30,554	25,704
Accounts receivable, net	10,199	9,194
Liabilities:
Liability for private warrants	8,268	13,614
Estimated Fair Value | Fair Value, Recurring
Assets:
Cash and cash equivalents	30,554	25,704
Accounts receivable, net	10,199	9,194
Liabilities:
Liability for private warrants	8,268	13,614
Estimated Fair Value | Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Cash and cash equivalents	30,554	25,704
Accounts receivable, net	10,199	9,194
Liabilities:
Liability for private warrants	0	0
Estimated Fair Value | Fair Value, Recurring | Significant Other Observable Inputs (Level 2)
Assets:
Cash and cash equivalents	0	0
Accounts receivable, net	0	0
Liabilities:
Liability for private warrants	0	0
Estimated Fair Value | Fair Value, Recurring | Significant Unobservable Inputs (Level 3)
Assets:
Cash and cash equivalents	0	0
Accounts receivable, net	0	0
Liabilities:
Liability for private warrants	$ 8,268	$ 13,614