Assets Held for Sale - Additional Information (Details)	1 Months Ended		3 Months Ended			9 Months Ended
	Jul. 31, 2020 USD ($) item	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($) item	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) item	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Assets Held For Sale, Disclosure [Line Items]
Impairment of assets held for sale		$ 1,537,000
(Gain) loss on disposal of intangible assets				$ 0	$ 0	$ 450,000	$ (48,000)
Proceeds from Sale of Intangible Assets						1,700,000	$ 0
ANDA
Assets Held For Sale, Disclosure [Line Items]
Impairment of assets held for sale						$ 1,500,000
Number of intangible assets classified as held for sale | item						14
Net book value	$ 1,250,000							$ 3,200,000
(Gain) loss on disposal of intangible assets	$ 0
Number Of Intangible Assets Sold | item	4
Proceeds from Sale of Intangible Assets	$ 1,250,000
ANDA | Subsequent Events
Assets Held For Sale, Disclosure [Line Items]
Net book value			$ 300,000
(Gain) loss on disposal of intangible assets			$ 700,000
Number Of Intangible Assets Sold | item			10
Proceeds from Sale of Intangible Assets			$ 1,000,000.0