6.	Preferred Stock

As of December 31, 2016 and 2015, the Company has authorized 5,000,000 shares of preferred stock. The preferred stock was classified under stockholders’ equity (deficit) as of December 31, 2016 and 2015.

The Company had issued Series A, Series B and Series C redeemable convertible preferred stock (collectively, the “Redeemable Preferred Stock”). The Redeemable Preferred Stock was classified outside of stockholders’ equity (deficit) as of December 31, 2013 because the shares contained redemption features that are not solely within the control of the Company. In July 2014, all issued and outstanding Redeemable Preferred Stock was converted to common stock, see Note 2.