Equity Transactions (Tables)

12 Months Ended

Dec. 31, 2019

Equity [Abstract]

Summary of Common Stock Reserved for Issuance

As of December 31, 2019, we had 131.5 million authorized shares of common stock, of which 58.0 million shares were issued and outstanding, and 21.4 million shares were reserved for future issuances as follows (in thousands):

Equity incentive plans	11,211
Option agreement with Adam R. Craig	1,120
Common stock purchase warrants	514
Series O convertible preferred stock	8,383
Employee stock purchase plan	176
Total common stock reserved	21,404