Equity Investment - Additional Information (Details) - USD ($) $ in Thousands, shares in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2016	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Gain on deemed sale from equity method investee	$ 131		$ 613
Loss from equity method investments	131	$ 412	613	$ 844
PACT Pharma
Schedule of Equity Method Investments [Line Items]
Investment balance	0		0			$ 0
Gain on deemed sale from equity method investee	200		1,500
Gain on equity investments net of prior period losses	100		900
Loss from equity method investments	$ 100	$ 400	600	$ 800
Unrealized loss on equity method investments			$ 600
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