COLLABORATION AND LICENSE AGREEMENTS (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2021

Dec. 31, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Long Term Debt

The outstanding balance of the Perceptive Credit Facility was:

Perceptive Credit Facility	September 30, 2021
Principal	$	30,000
Less: Debt issuance costs and discount at issuance	(3,180)
Net carrying amount	$	26,820

The outstanding balance of the Perceptive Credit Facility as of December 31, 2020 was:

Principal	$	30,000
Less: Debt issuance costs and discount at issuance	(3,655)
Net carrying amount	$	26,345

As of the Termination Date, the balance of the deferred gain was $3,764 and the note payable to the collaboration partner consisted of the following:

Note payable to collaboration partner	$	20,000
Unamortized discount on note payable	(3,454)
Note payable to collaboration partner, net	$	16,546

Contract with Customer, Contract Asset, Contract Liability, and Receivable

The following table provides a rollforward of deferred revenue:

	NIBR Agreement		Product Revenue		Total
Deferred revenue:
Beginning—January 1, 2020	$	6,130	$	13	$	6,143
Amounts invoiced	3,105		403		3,508
Recognition of revenue	(9,235)		(149)		(9,384)
Ending—December 31, 2020	$	—	$	267	$	267