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Leases (Tables) | 6 Months Ended
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Jun. 30, 2025
Leases |
Schedule of operating and finance lease right-of-use assets and related lease obligations | ​
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​ | ​ | ​ | June 30, | ​ | December 31, | ​ | ​ | ​
Leases | Classification | ​ | 2025 |  | 2024 |  |  | ​
Assets | ​ | ​ | (in thousands) | ​ |  | ​
Operating leases | Operating lease assets | ​ | $ | 28,561 | ​ | $ | 29,621 | ​ | ​ | ​
Finance lease | Finance lease assets* | ​ |  | 14,704 | ​ |  | 15,346 | ​ | ​ | ​
Total leased assets | ​ | ​ | $ | 43,265 | ​ | $ | 44,967 | ​ | ​ | ​
Liabilities | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Current | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Operating | Other current liabilities | ​ | $ | 4,574 | ​ | $ | 4,470 | ​ | ​ | ​
Finance | Current portion of finance lease obligation | ​ | ​ | 1,437 | ​ | ​ | 1,345 | ​ | ​ | ​
Non-current | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Operating | Other long-term liabilities | ​ | ​ | 24,363 | ​ | ​ | 25,321 | ​ | ​ | ​
Finance | Finance lease obligation | ​ |  | 41,567 | ​ |  | 42,329 | ​ | ​ | ​
Total lease liabilities | ​ | ​ | $ | 71,941 | ​ | $ | 73,465 | ​ | ​ | ​
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*Finance lease assets are recorded net of accumulated depreciation of $47.9 million and include $0.5 million of prepaid financing costs as of June 30, 2025. Finance lease assets are recorded net of accumulated depreciation of $47.4 million and include $0.5 million of prepaid financing costs as of December 31, 2024. | ​ | ​ | ​
Schedule of lease costs | ​
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​ | ​ | ​ | Three months ended | ​ | Six months ended |  | ​
​ | ​ | ​ | June 30, | ​ | June 30, | ​ | ​
Lease cost | Classification | ​ | 2025 |  | 2024 |  | 2025 |  | 2024 |  | ​
Operating lease cost | ​ | ​ | (in thousands) |  | ​
Product / services* | Cost of revenue | ​ | $ | 1,606 | ​ | $ | 1,694 | ​ | $ | 3,280 | ​ | $ | 3,522 | ​ | ​
Research and development | Operating expenses | ​ |  | 149 | ​ |  | 203 | ​ |  | 368 | ​ |  | 326 | ​ | ​
Sales and marketing* | Operating expenses | ​ |  | 450 | ​ |  | 451 | ​ |  | 894 | ​ |  | 902 | ​ | ​
General and administrative* | Operating expenses | ​ |  | 212 | ​ |  | 337 | ​ |  | 538 | ​ |  | 532 | ​ | ​
Total operating lease cost | ​ | ​ | $ | 2,417 | ​ | $ | 2,685 | ​ | $ | 5,080 | ​ | $ | 5,282 | ​ | ​
Finance lease cost | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Depreciation of leased assets | Cost of revenue, Research and development, Sales and marketing and General and administrative | ​ | $ | 321 | ​ | $ | 321 | ​ | $ | 643 | ​ | $ | 643 | ​ | ​
Interest on lease liabilities | Interest expense | ​ |  | 1,148 | ​ |  | 1,187 | ​ |  | 2,304 | ​ |  | 2,384 | ​ | ​
Total finance lease cost | ​ | ​ | $ | 1,469 | ​ | $ | 1,508 | ​ | $ | 2,947 | ​ | $ | 3,027 | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total lease cost | ​ | ​ | $ | 3,886 | ​ | $ | 4,193 | ​ | $ | 8,027 | ​ | $ | 8,309 | ​ | ​
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* Product / services, sales and marketing and general and administrative expense also includes short-term lease and variable lease costs of approximately $0.4 million and $1.0 million for the three and six months ended June 30, 2025, respectively, and includes short-term lease and variable lease costs of approximately $0.7 million and $1.3 million for the three and six months ended June 30, 2024, respectively. | ​ | ​
Schedule of future minimum operating and finance leases | ​
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​ | ​ | Finance | ​ | Operating |  | Total |
Maturity of Lease Liabilities | ​ | Leases | ​ | Leases | ​ | Leases | ​
​ | ​ | (in thousands) | ​
2025 | ​ | $ | 2,950 | ​ | $ | 3,243 | ​ | $ | 6,193 | ​
2026 | ​ |  | 6,008 | ​ |  | 5,405 | ​ |  | 11,413 | ​
2027 | ​ |  | 6,128 | ​ |  | 3,597 | ​ |  | 9,725 | ​
2028 | ​ |  | 6,251 | ​ |  | 2,478 | ​ |  | 8,729 | ​
2029 | ​ | ​ | 6,376 | ​ | ​ | 2,278 | ​ | ​ | 8,654 | ​
Thereafter | ​ | ​ | 48,960 | ​ | ​ | 22,384 | ​ | ​ | 71,344 | ​
Total lease payments | ​ | $ | 76,673 | ​ | $ | 39,385 | ​ | $ | 116,058 | ​
Less interest portion* | ​ | ​ | (33,669) | ​ | ​ | (10,448) | ​ | ​ | (44,117) | ​
Finance lease and operating lease obligations | ​ | $ | 43,004 | ​ | $ | 28,937 | ​ | $ | 71,941 | ​
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* Finance lease interest calculated using the implied interest rate; operating lease interest calculated using estimated corporate borrowing rate. | ​
Schedule of weighted-average remaining lease term and discount rates | ​
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​ | ​ | June 30, | ​
Lease term and discount rate |  | 2025 | ​
Weighted-average remaining lease term (years): | ​ | ​ | ​ | ​
Operating leases | ​ | ​ | 10.8 | ​
Finance leases | ​ |  | 11.6 | ​
Weighted-average discount rate: | ​ | ​ | ​ | ​
Operating leases | ​ |  | 5.5% | ​
Finance leases | ​ |  | 10.5% | ​
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Schedule of cash outflows by lease type | ​
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​ | ​ | Six months ended June 30,
Cash paid for amounts included in the measurement of lease liabilities |  | 2025 |  | 2024
​ | ​ | (in thousands)
Operating cash outflows from operating leases | ​ | $ | 5,080 | ​ | $ | 5,282
Operating cash outflows from finance leases | ​ |  | 2,304 | ​ |  | 2,384
Financing cash outflows from finance leases | ​ |  | 676 | ​ |  | 736
Operating lease assets obtained in exchange for operating lease liabilities | ​ |  | 1,411 | ​ |  | 825
Finance lease assets obtained in exchange for new finance lease liabilities | ​ |  | — | ​ |  | —
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