Equity Investment in PACT Pharma - Additional Information (Details) - USD ($) $ in Thousands, shares in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]
Gains on dilution of equity investment	$ 613		$ 1,229
Share of loss from equity method investee	(613)	$ (1,202)	$ (886)
PACT Pharma
Schedule of Equity Method Investments [Line Items]
Investment balance	0	0
Gains on dilution of equity investment	2,000
Share of loss from equity method investee	600	0
Operating losses on equity method investments	600	$ 1,200
Unrealized loss on equity method investments	1,300
PACT Pharma | Previously Reported
Schedule of Equity Method Investments [Line Items]
Losses on accumulated in prior periods of equity investment	$ 1,400
PACT Pharma | Series A Preferred Stock
Schedule of Equity Method Investments [Line Items]
Purchase of common stock, shares				1.0
PACT Pharma | Common Stock
Schedule of Equity Method Investments [Line Items]
Purchase of common stock, shares				3.6