Leases (Tables)

9 Months Ended

Sep. 30, 2019

Leases

Summary of supplemental balance sheet information related to leases

(In thousands)	Classification	September 30, 2019
Assets
Operating lease assets	Operating lease assets	$	46,755
Liabilities
Current:
Operating lease liabilities	Operating lease liabilities	$	6,833
Non-current:
Operating lease liabilities	Long-term operating lease liabilities		48,620
Total operating lease liabilities		$	55,453

Summary of components of lease expense

		Three Months		Nine Months
		Ended		Ended
(In thousands)	Classification	September 30, 2019		September 30, 2019
Operating lease expense	Selling, general and administrative expenses	$	2,512	$	7,431
Operating lease expense	Research and development expenses		238		715
Total operating lease expense (1)		$	2,750	$	8,146

(1) Includes short-term leases which were immaterial.

Summary of maturities of lease liabilities

(In thousands)
Three months ending December 31, 2019	$	2,201
Years ending December 31:
2020		7,242
2021		9,481
2022		9,746
2023		10,024
Thereafter		70,172
Total operating lease payments	$	108,866
Less: Estimated tenant improvement allowance		(15,721)
Less: Imputed interest		(37,692)
Present value of operating lease liabilities	$	55,453