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DEBT - Schedule of Future Minimum Payments Under Term Loan Facility (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Debt Disclosure [Abstract]
2021	$ 2,281
2022	4,184
2023	13,706
2024	13,098
Total	33,269
Less: amount representing interest	(6,632)
Less: unamortized debt discount and issuance costs	(1,063)
Less: unamortized end of term charge	(1,532)
Noncurrent portion of debt	$ 24,042

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Amount, after accumulated amortization, of debt discount.

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