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Leases (Tables) | 9 Months Ended
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Sep. 30, 2021
Leases |
Schedule of operating and finance lease right-of-use assets and related lease obligations | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | September 30, | ​ | December 31,
Leases | Classification | ​ | 2021 |  | 2020
Assets | ​ | ​ | (in thousands)
Operating leases | Operating lease assets | ​ | $ | 8,106 | ​ | $ | 4,542
Finance lease | Finance lease assets * | ​ |  | 19,563 | ​ |  | 20,544
Total leased assets | ​ | ​ | $ | 27,669 | ​ | $ | 25,086
Liabilities | ​ | ​ | ​ | ​ | ​ | ​ | ​
Current | ​ | ​ | ​ | ​ | ​ | ​ | ​
Operating | Other current liabilities | ​ | $ | 3,874 | ​ | $ | 2,573
Finance | Current portion of finance lease obligation | ​ | ​ | 921 | ​ | ​ | 756
Noncurrent | ​ | ​ | ​ | ​ | ​ | ​ | ​
Operating | Other long-term liabilities | ​ | ​ | 4,220 | ​ | ​ | 1,949
Finance | Finance lease obligation | ​ |  | 46,672 | ​ |  | 47,393
Total lease liabilities | ​ | ​ | $ | 55,687 | ​ | $ | 52,671
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
* Finance lease assets are recorded net of accumulated depreciation of $49.2 million and include $0.7 million of prepaid financing costs as of September 30, 2021. Finance lease assets are recorded net of accumulated depreciation of $48.4 million and include $0.7 million of prepaid financing costs as of December 31, 2020. ​
Schedule of lease costs | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Three months ended | ​ | Nine months ended |  | ​
​ | ​ | ​ | September 30, | ​ | September 30, | ​ | ​
Lease cost | Classification | ​ | 2021 |  | 2020 |  | 2021 |  | 2020 |  | ​
Operating lease cost | ​ | ​ | (in thousands) |  | ​
Service | Cost of revenue | ​ | $ | 790 | ​ | $ | 601 | ​ | $ | 2,074 | ​ | $ | 1,776 | ​ | ​
Research and development | Operating expenses | ​ |  | 114 | ​ |  | 137 | ​ |  | 366 | ​ |  | 347 | ​ | ​
Sales and marketing* | Operating expenses | ​ |  | 414 | ​ |  | 347 | ​ |  | 1,169 | ​ |  | 1,024 | ​ | ​
General and administrative* | Operating expenses | ​ |  | 254 | ​ |  | 213 | ​ |  | 714 | ​ |  | 648 | ​ | ​
Total operating lease cost | ​ | ​ | $ | 1,572 | ​ | $ | 1,298 | ​ | $ | 4,323 | ​ | $ | 3,795 | ​ | ​
Finance lease cost | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Depreciation of leased assets | Cost of revenue, R&D, Sales and marketing and G&A | ​ | $ | 326 | ​ | $ | 328 | ​ | $ | 981 | ​ | $ | 1,009 | ​ | ​
Interest on lease liabilities | Interest expense | ​ |  | 1,269 | ​ |  | 1,296 | ​ |  | 3,822 | ​ |  | 3,898 | ​ | ​
Total finance lease cost | ​ | ​ | $ | 1,595 | ​ | $ | 1,624 | ​ | $ | 4,803 | ​ | $ | 4,907 | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total lease cost | ​ | ​ | $ | 3,167 | ​ | $ | 2,922 | ​ | $ | 9,126 | ​ | $ | 8,702 | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
* Sales and marketing and general and administrative expense also includes short-term lease and variable lease costs of approximately $0.6 million and $1.4 million for the three and nine months ended September 30, 2021, respectively, and includes short-term and variable lease costs of approximately $0.3 million and $0.8 million for the three and nine months ended September 30, 2020, respectively. | ​ | ​
Schedule of future minimum operating and finance leases | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Finance | ​ | Operating |  | Total |
Maturity of Lease Liabilities | ​ | Leases | ​ | Leases | ​ | Leases | ​
​ | ​ | (in thousands) | ​
2021 | ​ | $ | 1,465 | ​ | $ | 1,127 | ​ | $ | 2,592 | ​
2022 | ​ |  | 5,980 | ​ |  | 3,980 | ​ |  | 9,960 | ​
2023 | ​ |  | 6,114 | ​ |  | 1,849 | ​ |  | 7,963 | ​
2024 | ​ |  | 6,252 | ​ |  | 838 | ​ |  | 7,090 | ​
2025 | ​ | ​ | 5,930 | ​ | ​ | 692 | ​ | ​ | 6,622 | ​
Thereafter | ​ | ​ | 73,723 | ​ | ​ | 531 | ​ | ​ | 74,254 | ​
Total lease payments | ​ | $ | 99,464 | ​ | $ | 9,017 | ​ | $ | 108,481 | ​
Less interest portion* | ​ | ​ | (51,871) | ​ | ​ | (923) | ​ | ​ | (52,794) | ​
Finance lease and operating lease obligations | ​ | $ | 47,593 | ​ | $ | 8,094 | ​ | $ | 55,687 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
* 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 | ​
​ | ​ | ​ | ​ | ​
​ | ​ | September 30, | ​
Lease term and discount rate |  | 2021 | ​
Weighted-average remaining lease term (years): | ​ | ​ | ​ | ​
Operating leases | ​ | ​ | 3.0 | ​
Finance leases | ​ |  | 15.3 | ​
Weighted-average discount rate: | ​ | ​ | ​ | ​
Operating leases | ​ |  | 4.5% | ​
Finance leases | ​ |  | 10.5% | ​
​ | ​ | ​ | ​ | ​
Schedule of cash outflows by lease type | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Nine months ended | ​
​ | ​ | September 30, | ​
Cash paid for amounts included in the measurement of lease liabilities |  | 2021 | ​ | 2020 | ​
​ | ​ | (in thousands) | ​
Operating cash outflows from operating leases | ​ | $ | 4,323 | ​ | $ | 3,795 | ​
Operating cash outflows from finance leases | ​ |  | 3,821 | ​ |  | 4,035 | ​
Financing cash outflows from finance leases | ​ | ​ | 562 | ​ | ​ | 252 | ​
Operating lease assets obtained in exchange for operating lease liabilities | ​ |  | 6,396 | ​ |  | 1,658 | ​
Finance lease assets obtained in exchange for new finance lease liabilities | ​ | $ | — | ​ | $ | — | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

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