Loss Per Share - Schedule of Anti-dilutive Potential Shares Outstanding Activity (Details) - shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares	4,348,559	6,576,816
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares	1,574,878	516,875
Common Stock Warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares	10,638,298
Shares Committed Under ESPP [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares	54,632