Equity Investment in PACT Pharma - Additional Information (Details) - USD ($) shares in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]
Loss from equity method investments	$ 1,202,000	$ 886,000
Equity investment in related party		1,202,000
PACT Pharma
Schedule of Equity Method Investments [Line Items]
Loss from equity method investments	1,200,000	$ 900,000
Equity investment in related party	0
Unrealized loss on equity method investments	$ 800,000
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