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LEASES (Tables) | 9 Months Ended
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Sep. 30, 2021
LEASES |
Schedule of lease cost | The following components of lease expense are included in the Company’s condensed consolidated statements of operations for the three and nine months ended September 30, 2021 and 2020:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three months ended | ​ | Nine months ended
​ |  | September 30, | ​ | September 30,
(in thousands) |  | 2021 |  | 2020 |  | 2021 |  | 2020
Operating lease cost | ​ | $ | 532 | ​ | $ | 534 | ​ | $ | 1,595 | ​ | $ | 1,611
Net lease cost | ​ | $ | 532 | ​ | $ | 534 | ​ | $ | 1,595 | ​ | $ | 1,611
Schedule of classification of lease liabilities | The balance sheet classification of lease liabilities was as follows:
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | September 30, |  | December 31,
(in thousands) |  | 2021 |  | 2020
Liabilities |  | ​ |  |  | ​ |
Lease liability current portion | ​ | $ | 1,468 | ​ | $ | 1,669
Lease liability non-current | ​ |  | 10,020 | ​ |  | 10,412
Total lease liability | ​ | $ | 11,488 | ​ | $ | 12,081
Schedule of lease liability maturity | As of September 30, 2021, the maturities of lease liabilities were as follows:
​ | ​ | ​ | ​
​ |  | Operating
(in thousands) |  | ​ | leases
Remainder of 2021 | ​ | $ | 505
2022 | ​ | ​ | 2,035
2023 | ​ |  | 2,040
2024 | ​ |  | 1,924
2025 | ​ |  | 1,653
After 2026 | ​ |  | 9,889
Total lease payments | ​ |  | 18,046
Less: interest | ​ |  | (6,558)
Present value of lease liabilities(*) | ​ | $ | 11,488
(*) | 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.

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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 http://asc.fasb.org/extlink&oid=123408670&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 http://asc.fasb.org/extlink&oid=123408670&loc=SL77918701-209980 + Details
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