Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2018

Stockholders' Equity

Schedule of common reserved shares of common stock for issuance

	December 31,	December 31,
	2018	2017
Options issued and outstanding	2,944,148	2,984,304
Inducement options issued and outstanding	208,865	—
Options available for grant under stock option plans	162,892	513,385
RSU awards issued and outstanding	392,904	392,923
Warrants issued and outstanding	2,427,653	443,756
Convertible notes	759,396	1,036,717
Total	6,895,858	5,371,085