Preferred Stock

3 Months Ended

12 Months Ended

Mar. 31, 2020

Dec. 31, 2019

Temporary Equity Disclosure [Abstract]

Preferred Stock

8. Preferred Stock and Common Stock

As of March 31, 2020, the Company had 10,000,000 shares of preferred stock authorized and none issued and outstanding.

Reserve for future issuance

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:


	March 31, 2020		December 31, 2019
Options issued and outstanding		2,302,435		2,562,800
Unvested restricted stock units		753,863		828,935
Options available for future grants		2,007,250		215,043
Shares available for issuance under the 2018 ESPP		920,030		555,583

Total		5,983,578		4,162,361

8. Preferred Stock

As of December 31, 2019 and 2018, the Company had 10,000,000 shares of preferred stock authorized and none was issued and outstanding.