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LEASES (Tables) | 9 Months Ended
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Sep. 30, 2022
LEASES |
Schedule of lease cost |
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​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three months ended | ​ | Nine months ended
​ |  | September 30, | ​ | September 30, | ​ | September 30,
(in thousands) |  | 2022 |  | 2021 |  | 2022 |  | 2021
Operating lease cost | ​ | $ | 1,062 | ​ | $ | 532 | ​ | $ | 2,100 | ​ | $ | 1,595
Net lease cost | ​ | $ | 1,062 | ​ | $ | 532 | ​ | $ | 2,100 | ​ | $ | 1,595
Schedule of classification of lease liabilities |
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | September 30, |  | December 31,
(in thousands) |  | 2022 |  | 2021
Liabilities |  | ​ |  |  | ​ |
Lease liability current portion | ​ | $ | 1,616 | ​ | $ | 1,437
Lease liability non-current | ​ |  | 10,582 | ​ |  | 9,847
Total lease liability | ​ | $ | 12,198 | ​ | $ | 11,284
Schedule of lease liability maturity | As of September 30, 2022, the maturities of lease liabilities were as follows:
​ | ​ | ​ | ​
​ |  | Operating
(in thousands) |  | ​ | leases
Remainder of 2022 | ​ | $ | 591
2023 | ​ | ​ | 2,375
2024 | ​ |  | 2,388
2025 | ​ |  | 2,100
2026 | ​ |  | 2,080
After 2027 | ​ |  | 8,436
Total lease payments | ​ |  | 17,970
Less: interest | ​ |  | (5,772)
Present value of lease liabilities(*) | ​ | $ | 12,198
(*) | As our leases do not provide an implicit rate, we use our incremental borrowing rate based on the information available at commencement date and considering the term of the lease to determine the present value of lease payments. We used the incremental borrowing rate of 10.25% on February 28, 2019, for operating leases that commenced prior to that date through December 31, 2021. We used an incremental borrowing rate of 5.65% for the NC lease.

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- Definition Tabular disclosure for balance sheet classification of lease liabilities. + References No definition available. + Details
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- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980 + Details
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- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 + Details
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