LOANS PAYABLE - Summary (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
LOAN PAYABLE
Loan payable	$ 70,000	$ 70,000
Add: Accreted Liability of final payment fee	6,031	5,140
Loan payable, gross	76,031	75,140
Less: unamortized debt issuance costs	(5,993)	(7,377)
Loan payable	70,038	67,763
Total loan payable	70,038	67,763
Less: Current portion		(975)
Loan payable non-current	$ 70,038	$ 66,788

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Long term debt excluding principal payments

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Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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