Leases (Tables)

12 Months Ended

Dec. 31, 2020

Leases

Summary of supplemental balance sheet information related to leases

(In thousands)	Classification	December 31, 2020		December 31, 2019
Assets
Operating lease assets	Operating lease assets	$	43,260	$	46,604
Liabilities
Current:
Operating lease liabilities	Operating lease liabilities	$	9,867	$	7,762
Non-current:
Operating lease liabilities	Long-term operating lease liabilities		47,220		47,725
Total operating lease liabilities		$	57,087	$	55,487

Summary of components of lease expense

		Year Ended		Year Ended		Year Ended
(In thousands)	Classification	December 31, 2020		December 31, 2019		December 31, 2018
Operating lease expense	Selling, general and administrative expense	$	7,974	$	7,959	$	7,985
Operating lease expense	Research and development expense		758		164		—
Total operating lease expense (1)		$	8,732	$	8,123	$	7,985

(1) Excludes short-term leases which were immaterial and office lease service-related charges.

Summary of cash information related to leases

	Year Ended		Year Ended
(In thousands)	December 31, 2020		December 31, 2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$	3,804	$	7,210

Summary of maturities of lease liabilities

(In thousands)
Year ending December 31:
2021	$	10,330
2022		10,345
2023		10,134
2024		10,351
2025		10,649
Thereafter		49,309
Total operating lease payments	$	101,118
Less: Estimated tenant improvement allowance		(12,053)
Less: Imputed interest		(31,978)
Present value of operating lease liabilities	$	57,087