Preferred Stock - Series C Convertible Preferred Stock (Details) - USD ($)	1 Months Ended			12 Months Ended
	Dec. 31, 2020	Oct. 31, 2020	Sep. 30, 2020	Dec. 31, 2020	Dec. 31, 2019	Aug. 28, 2018
Preferred stock, shares outstanding	857,055			857,055	5,537,062
Number of securities issued on conversion						9,580
Carrying amount in excess of fair value amount	$ 2,500,000		$ 150,000	$ 2,500,000
Warrants and Rights Outstanding	$ 179,000			$ 179,000	$ 3,000
Series A
Preferred stock, shares outstanding					5,524,926
Series C perpetual preferred stock
Preferred stock, shares outstanding	0			0	0
Percentage of cumulative stock dividends eligible to receive				10.00%
Number of consecutive months				24 months
Fair value of preferred stock	$ 4,700,000			$ 4,700,000
Iliad | Series A
Number of shares issued for each convertible preferred stock			5,524,926
Iliad | Series C perpetual preferred stock
Number of shares issued for each convertible preferred stock			842,500
Preferred stock, par value (in dollars per share)			$ 0.0001
Accreted value			$ 11,200,000
Gross proceeds from the issuance of common stock			2,300,000
Carrying value			$ 2,600,000
Percentage increase in the outstanding balance			5.00%
Exchange Agreement with Iliad
Shares issued on conversion	8,203,880	250,000
Exchange Agreement with Iliad | Series C perpetual preferred stock
Shares converted	573,810	285,000
Pre-funded Warrants | Exchange Agreement with Iliad
Number of securities issued on conversion		7,057,692
Warrants and Rights Outstanding	$ 1,000			$ 1,000
Pre-funded Warrants | Exchange Agreement with Iliad | Series C perpetual preferred stock
Exercise price (in dollars per share)		$ 0.0001