Preferred Stock and Common Stock (Tables)

6 Months Ended

Jun. 30, 2019

Temporary Equity Disclosure [Abstract]

Schedule of Number of Shares of Common Stock Reserved for Future Issuance Text Block

The Company has reserved the following number of shares of common stock for future issuance upon the exercise of options, vesting of restricted stock units or grant of equity awards:

	June 30, 2019		December 31, 2018
Options issued and outstanding		2,087,272		1,122,677
Unvested restricted stock units		18,720		24,960
Options available for future grants		1,501,171		1,350,582
Shares available for issuance under the 2018 ESPP		555,583		275,030
Total		4,162,746		2,773,249