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Leases | 9 Months Ended
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Sep. 30, 2023
Leases [Abstract] |
Leases | 5. Leases We lease 23,890 square feet of office space in Minneapolis, Minnesota, which houses our principal executive offices and our manufacturing facility. We lease this space under an operating lease agreement that commenced December 1, 2008, and was scheduled to expire August 31, 2024. On April 21, 2023, we extended the operating lease for our office space in Minneapolis, Minnesota for an additional 49 consecutive months through August 31, 2028. We intend to add new facilities as we grow, and we believe that suitable additional or substitute space will be available as needed to accommodate any such expansion of our operations. Our operating lease agreement includes an option to renew for one additional period of three years. The exercise of the lease renewal option is at our sole discretion and was not included in the lease term for the calculation of the ROU asset and lease liability, as it is not reasonably certain of exercise. In addition to base rent, we also pay our proportionate share of operating expenses, as defined in the lease. These payments are made monthly and are adjusted annually to reflect actual charges incurred for operating expenses, such as common area maintenance, taxes and insurance. The following table presents the lease balances within the condensed consolidated balance sheets:
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | September 30, | ​ | December 31,
(in thousands) | ​ | 2023 | ​ | 2022
Right-of-use assets: | ​ | ​ | ​ | ​ | ​ | ​
Operating lease right-of-use asset | ​ | $ | 1,058 | ​ | $ | 334
Operating lease liabilities: | ​ | ​ | ​ | ​ | ​ | ​
Accrued expenses | ​ | ​ | 170 | ​ | ​ | 222
Operating lease liability, non-current portion | ​ | ​ | 916 | ​ | ​ | 117
Total operating lease liabilities | ​ | $ | 1,086 | ​ | $ | 339
​ Maturities of our lease liability for our operating lease are as follows as of September 30, 2023: ​
​ | ​ | ​ | ​
​ | ​ | September 30,
(in thousands) | ​ | 2023
2023, remainder | ​ | $ | 59
2024 | ​ | ​ | 223
2025 | ​ | ​ | 255
2026 | ​ | ​ | 262
2027 | ​ | ​ | 270
2028 | ​ | ​ | 161
Total undiscounted lease payments | ​ | ​ | 1,230
Less: imputed interest | ​ | ​ | (144)
Present value of lease liability | ​ | $ | 1,086
​ ​ As of September 30, 2023, the remaining lease term was 4.9 years and the discount rate was 5.0%. The operating cash outflows from our operating lease were $0.3 million for each of the nine months ended September 30, 2023 and 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 -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//842-20/tableOfContent + Details
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