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Leases (Tables) | 12 Months Ended
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Dec. 31, 2023
Leases |
Schedule of operating and finance lease right-of-use assets and related lease obligations | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | December 31, | ​ | December 31, | ​ | ​ | ​
Leases | Classification | ​ | 2023 |  | 2022 |  |  | ​
Assets | ​ | ​ | (in thousands) | ​ |  | ​
Operating leases | Operating lease assets | ​ | $ | 30,716 | ​ | $ | 12,146 | ​ | ​ | ​
Finance lease | Finance lease assets* | ​ |  | 16,632 | ​ |  | 17,942 | ​ | ​ | ​
Total leased assets | ​ | ​ | $ | 47,348 | ​ | $ | 30,088 | ​ | ​ | ​
Liabilities | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Current | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Operating | Other current liabilities | ​ | $ | 4,978 | ​ | $ | 5,367 | ​ | ​ | ​
Finance | Current portion of finance lease obligation | ​ | ​ | 1,511 | ​ | ​ | 1,229 | ​ | ​ | ​
Non-current | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Operating | Other long-term liabilities | ​ | ​ | 25,724 | ​ | ​ | 6,931 | ​ | ​ | ​
Finance | Finance lease obligation | ​ |  | 43,674 | ​ |  | 45,185 | ​ | ​ | ​
Total lease liabilities | ​ | ​ | $ | 75,887 | ​ | $ | 58,712 | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
*Finance lease assets are recorded net of accumulated depreciation of $46.4 million and include $0.6 million of prepaid financing costs as of December 31, 2023. Finance lease assets are recorded net of accumulated depreciation of $45.9 million and include $0.6 million of prepaid financing costs as of December 31, 2022. ​ | ​ | ​ | ​
Schedule of lease costs | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Year ended |  | ​
​ | ​ | ​ | December 31, | ​ | ​
Lease cost | Classification | ​ | 2023 |  | 2022 |  | 2021 |  | ​
Operating lease cost | ​ | ​ | (in thousands) |  | ​
Product / services* | Cost of revenue | ​ | $ | 7,297 | ​ | $ | 5,427 | ​ | $ | 2,978 | ​ | ​
Research and development | Operating expenses | ​ |  | 587 | ​ |  | 322 | ​ |  | 430 | ​ | ​
Sales and marketing* | Operating expenses | ​ |  | 1,674 | ​ |  | 1,526 | ​ |  | 1,605 | ​ | ​
General and administrative* | Operating expenses | ​ |  | 1,111 | ​ |  | 1,065 | ​ |  | 996 | ​ | ​
Total operating lease cost | ​ | ​ | $ | 10,669 | ​ | $ | 8,340 | ​ | $ | 6,009 | ​ | ​
Finance lease cost | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Depreciation of leased assets | Cost of revenue, Research and development, Sales and marketing and General and administrative | ​ | $ | 1,310 | ​ | $ | 1,296 | ​ | $ | 1,306 | ​ | ​
Interest on lease liabilities | Interest expense | ​ |  | 4,874 | ​ |  | 4,992 | ​ |  | 5,086 | ​ | ​
Total finance lease cost | ​ | ​ | $ | 6,184 | ​ | $ | 6,288 | ​ | $ | 6,392 | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total lease cost | ​ | ​ | $ | 16,853 | ​ | $ | 14,628 | ​ | $ | 12,401 | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
* Product / services, sales and marketing and general and administrative expense also includes short-term lease and variable lease costs of approximately $2.1 million, $1.8 million and $1.9 million for the years ended December 31, 2023, 2022 2021, respectively. | ​ | ​
Schedule of future minimum operating and finance leases | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Finance | ​ | Operating |  | Total |
Maturity of Lease Liabilities | ​ | Leases | ​ | Leases | ​ | Leases | ​
​ | ​ | (in thousands) | ​
2024 | ​ | $ | 6,252 | ​ | $ | 6,529 | ​ | $ | 12,781 | ​
2025 | ​ |  | 5,930 | ​ |  | 4,970 | ​ |  | 10,900 | ​
2026 | ​ |  | 6,008 | ​ |  | 3,613 | ​ |  | 9,621 | ​
2027 | ​ |  | 6,128 | ​ |  | 2,530 | ​ |  | 8,658 | ​
2028 | ​ | ​ | 6,251 | ​ | ​ | 1,926 | ​ | ​ | 8,177 | ​
Thereafter | ​ | ​ | 55,336 | ​ | ​ | 23,205 | ​ | ​ | 78,541 | ​
Total lease payments | ​ | $ | 85,905 | ​ | $ | 42,773 | ​ | $ | 128,678 | ​
Less interest portion* | ​ | ​ | (40,720) | ​ | ​ | (12,071) | ​ | ​ | (52,791) | ​
Finance lease and operating lease obligations | ​ | $ | 45,185 | ​ | $ | 30,702 | ​ | $ | 75,887 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
* 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 | ​
​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​
Lease term and discount rate |  | 2023 | ​
Weighted-average remaining lease term (years): | ​ | ​ | ​ | ​
Operating leases | ​ | ​ | 11.5 | ​
Finance leases | ​ |  | 13.1 | ​
Weighted-average discount rate: | ​ | ​ | ​ | ​
Operating leases | ​ |  | 5.5% | ​
Finance leases | ​ |  | 10.5% | ​
​ | ​ | ​ | ​ | ​
Schedule of cash outflows by lease type | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended December 31, | ​
Cash paid for amounts included in the measurement of lease liabilities |  | 2023 |  | 2022 |  | 2021 | ​
​ | ​ | (in thousands) | ​
Operating cash outflows from operating leases | ​ | $ | 10,669 | ​ | $ | 8,340 | ​ | $ | 6,009 | ​
Operating cash outflows from finance leases | ​ |  | 4,874 | ​ |  | 4,992 | ​ |  | 5,086 | ​
Financing cash outflows from finance leases | ​ |  | 1,240 | ​ |  | 987 | ​ |  | 763 | ​
Operating lease assets obtained in exchange for operating lease liabilities | ​ |  | 26,890 | ​ |  | 6,173 | ​ |  | 8,670 | ​
Finance lease assets obtained in exchange for new finance lease liabilities | ​ |  | — | ​ |  | — | ​ |  | — | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​

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