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Note 5 - LEASES | 6 Months Ended
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Jun. 30, 2022
LEASES |
5. LEASES | 5. LEASES The Company leases administrative and sales offices and certain equipment under non-cancellable operating leases, which contain various renewal options and, in some cases, require payment of common area costs, taxes and utilities. These operating leases expire at various dates through 2028. The Company had no leases that were classified as a financing lease as of June 30, 2022, and December 31, 2021. In the first quarter of 2022, the Company early terminated an office lease contract. The termination of this lease reduced the Company’s operating lease right-of-use assets and lease liabilities by approximately $0.5 million and $0.6 million, respectively. The gain from the lease termination of approximately $0.1 million was recorded under selling, general and administrative expense in the Condensed Consolidated Statement of Comprehensive Loss for the six months ended June 30, 2022. Lease expense was comprised of the following (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended June 30, | ​ | Six Months Ended June 30,
​ |  | 2022 |  | 2021 |  | 2022 |  | 2021
Operating lease expense (1) | ​ | $ | 353 | ​ | $ | 484 | ​ | $ | 698 | ​ | $ | 969
Short-term lease and variable lease expense (2) | ​ |  | 274 | ​ |  | 233 | ​ |  | 557 | ​ |  | 407
Total lease expense | ​ | $ | 627 | ​ | $ | 717 | ​ | $ | 1,255 | ​ | $ | 1,376
| (1) | Net of gain recognized upon lease termination of $0.1 million in the six months ended June 30, 2022.
| (2) | Leases with an initial term of 12 months or less are not recorded on the Condensed Consolidated Balance Sheets, and the Company recognizes lease expense for these leases on a straight-line basis over the lease term. Variable lease expense for the periods presented primarily included common area maintenance charges.
Supplemental balance sheets information related to operating leases was as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | December 31, |
​ |  | 2022 |  | 2021 |
Weighted average remaining lease term under operating ROU leases (in years) | ​ | ​ | 5.5 | ​ | ​ | 5.7 | ​
Weighted average discount rate for operating lease liabilities |  | ​ | 4.96 | % | ​ | 5.25 | %
​ Maturities of operating lease liabilities as of June 30, 2022, were as follows (in thousands):
​ | ​ | ​ | ​
Year Ending December 31, |  | Amount (1)
2022 (remaining six months) | ​ | $ | 798
2023 |  | ​ | 1,488
2024 |  | ​ | 1,366
2025 |  | ​ | 1,258
2026 |  | ​ | 1,154
2027 and thereafter | ​ | ​ | 1,701
Total future minimum lease payments | ​ | $ | 7,765
Less: Interest (2) | ​ |  | (997)
Present value of future minimum lease payments under operating lease liabilities (3) | ​ | $ | 6,768
| (1) | As of June 30, 2022, the total operating lease liability includes approximately $1.1 million related to an option to extend a lease term that is reasonably certain to be exercised.
| (2) | Calculated using incremental borrowing interest rate for each lease.
| (3) | Includes the current portion of operating lease liabilities of $1.5 million as of June 30, 2022.

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- Definition The entire disclosure for operating leases of lessee. Includes, but is not limited to, description of operating lease and maturity analysis of operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=77888251 + Details
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