Common Stock and Stock Warrants (Tables)

3 Months Ended

Mar. 31, 2019

Equity [Abstract]

Shares Reserved for Future Issuance

Shares reserved for future issuance at March 31, 2019 are as follows:

	Number of Shares
Common stock reserved for issuance for:
Outstanding stock options	1,494,620
Restricted stock units	5,100,000
Common stock options available for future grant:
2014 Equity Incentive Plan	813,032
2017 Inducement Equity Incentive Plan	1,850,000
Common stock reserved for issuance for outstanding warrants	240,620
Total common shares reserved for future issuance	9,498,272