Goodwill and Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2021

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

The gross carrying amounts and net book value of intangible assets were as follows (in thousands):

	September 30, 2021
	Gross Carrying Amount		Accumulated Amortization		Net Book Value
Intangible assets with finite lives:
Acquired license agreement	$	26,685	$	1,575	$	25,110
In-place lease		1,433		111		1,322
Total intangible assets with finite lives		28,118		1,686		26,432
Acquired in-process research and development assets ("IPR&D")		36,550		—		36,550
Total intangible and acquired IPR&D assets	$	64,668	$	1,686	$	62,982

	December 31, 2020
	Gross Carrying Amount		Accumulated Amortization		Net Book Value
Intangible assets with finite lives:
Acquired license agreement	$	26,685	$	398	$	26,287
In-place lease		1,433		24		1,409
Total intangible assets with finite lives		28,118		422		27,696
Acquired IPR&D assets		39,295		—		39,295
Total intangible and acquired IPR&D assets	$	67,413	$	422	$	66,991

Schedule of Finite-Lived Intangible Assets Estimated Future Amortization Expense

Based on finite-lived intangible assets recorded as of September 30, 2021, the estimated future amortization expense for the next five years is as follows (in thousands):

Year Ending December 31,	Estimated Amortization Expense
2021 (remaining three months)	$	423
2022		1,722
2023		1,733
2024		1,733
2025		1,733
Thereafter		19,088