Summary of Significant Accounting Policies - Schedule of Computation of Potentially Dilutive Securities (Details) - shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Total potential dilutive securities (in shares)	6,129,550	3,668,211
Convertible note - principal
Total potential dilutive securities (in shares)	0	702,247
Options to purchase common stock
Total potential dilutive securities (in shares)	3,440,437	561,536
Unvested restricted stock units
Total potential dilutive securities (in shares)	244,785	63,600
Financing warrants to purchase common stock
Total potential dilutive securities (in shares)	2,444,328	2,340,828