Equity Investment - Additional Information (Details) - USD ($) shares in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]
Gain on deemed sale from equity method investee	$ 482,000	$ 0
Loss from equity method investments	482,000	431,000
PACT Pharma
Schedule of Equity Method Investments [Line Items]
Investment balance	0	0	$ 0
Gain on deemed sale from equity method investee	1,300,000
Loss from equity method investments	500,000	$ 0	$ 800,000
Gain on equity investments net of prior period losses	500,000
Unrealized loss on equity method investments	$ 100,000
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