Licensed rights and other intangible assets

3 Months Ended

Mar. 31, 2022

Goodwill And Intangible Assets Disclosure [Abstract]

Licensed rights and other intangible assets

6. Licensed rights and other intangible assets

The following provides information about our license rights and other intangible assets, net (in thousands):

	March 31, 2022						December 31, 2021
	Gross						Gross
	Carrying		Accumulated				Carrying		Accumulated
	Amount		Amortization		Net		Amount		Amortization		Net
Licensed rights and intangible assets    subject to amortization:
License rights	$	40,000	$	7,580	$	32,420	$	40,000	$	6,826	$	33,174
Hormone therapy drug patents		6,117		1,229		4,888		5,834		1,042		4,792
Hormone therapy drug patents applied    and pending approval		1,907		—		1,907		2,020		—		2,020
License rights and other intangible assets    subject to amortization		48,024		8,809		39,215		47,854		7,868		39,986
Intangible assets not subject to amortization:
Trademarks/trade name rights		332		—		332		332		—		332
License rights and other intangible assets, net	$	48,356	$	8,809	$	39,547	$	48,186	$	7,868	$	40,318

We recorded amortization expense related to the exclusive license rights agreement with Population Council of $0.8 million for the three months ended March 31, 2022 and 2021. We recorded amortization expense related to patents of $0.2 million and $0.1 million for the three months ended March 31, 2022 and 2021, respectively.