Leases (Tables)

6 Months Ended

Jun. 30, 2021

Leases

Schedule of operating and finance lease right-of-use assets and related lease obligations

		June 30,		December 31,
Leases	Classification	2021		2020
Assets		(in thousands)
Operating leases	Operating lease assets	$	7,626	$	4,542
Finance lease	Finance lease assets *		19,889		20,544
Total leased assets		$	27,515	$	25,086
Liabilities
Current
Operating	Other current liabilities	$	3,215	$	2,573
Finance	Current portion of finance lease obligation		864		756
Noncurrent
Operating	Other long-term liabilities		4,398		1,949
Finance	Finance lease obligation		46,923		47,393
Total lease liabilities		$	55,400	$	52,671
* Finance lease assets are recorded net of accumulated depreciation of $48.9 million and include $0.7 million of prepaid financing costs as of June 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				Six months ended
		June 30,				June 30,
Lease cost	Classification	2021		2020		2021		2020
Operating lease cost		(in thousands)
Service	Cost of revenue	$	644	$	624	$	1,283	$	1,174
Research and development	Operating expenses		122		128		252		209
Sales and marketing*	Operating expenses		376		346		755		678
General and administrative*	Operating expenses		201		220		461		435
Total operating lease cost		$	1,343	$	1,318	$	2,751	$	2,496
Finance lease cost
Depreciation of leased assets	Cost of revenue, R&D, Sales and marketing and G&A	$	328	$	328	$	656	$	681
Interest on lease liabilities	Interest expense		1,274		1,299		2,553		2,602
Total finance lease cost		$	1,602	$	1,627	$	3,209	$	3,283
Total lease cost		$	2,945	$	2,945	$	5,960	$	5,779
* Sales and marketing and general and administrative expense also includes short-term lease and variable lease costs of approximately $0.4 million and $0.9 million for the three and six months ended June 30, 2021, respectively, and includes short-term and variable lease costs of approximately $0.3 million and $0.5 million for the three and six months ended June 30, 2020, respectively.

Schedule of future minimum operating and finance leases

	Finance		Operating		Total
Maturity of Lease Liabilities	Leases		Leases		Leases
	(in thousands)
2021	$	2,929	$	1,827	$	4,756
2022		5,980		3,053		9,033
2023		6,114		1,544		7,658
2024		6,252		794		7,046
2025		5,930		712		6,642
Thereafter		73,723		545		74,268
Total lease payments	$	100,928	$	8,475	$	109,403
Less interest portion*		(53,141)		(862)		(54,003)
Finance lease and operating lease obligations	$	47,787	$	7,613	$	55,400
* 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

	June 30,
Lease term and discount rate	2021
Weighted-average remaining lease term (years):
Operating leases		3.0
Finance leases		15.6
Weighted-average discount rate:
Operating leases		4.5%
Finance leases		10.5%

Schedule of cash outflows by lease type

	Six months ended
	June 30,
Cash paid for amounts included in the measurement of lease liabilities	2021		2020
	(in thousands)
Operating cash outflows from operating leases	$	2,751	$	2,496
Operating cash outflows from finance leases		2,556		2,746
Financing cash outflows from finance leases		362		108
Operating lease assets obtained in exchange for operating lease liabilities		4,192		1,038
Finance lease assets obtained in exchange for new finance lease liabilities	$	—	$	—