Net Loss Per Share	6 Months Ended
	Jun. 30, 2020
Earnings Per Share [Abstract]
Net Loss Per Share	Net Loss Per ShareBasic net loss per share is calculated by dividing net loss by the weighted average number of common shares outstanding for the period, without consideration for common stock equivalents. Diluted net loss per share is calculated by dividing net loss by the weighted-average number of common share equivalents outstanding for the period determined using the treasury-stock method. Dilutive common stock equivalents are comprised of options outstanding under our stock option plans. For all periods presented, there is no difference in the number of shares used to calculate basic and diluted net loss per share.Dilutive common stock equivalents were 28,577,380 for the three and six months ended June 30, 2020, consisting of convertible preferred stock, stock options and restricted stock units, and 3,115,713 and 1,888,548 for the three and six months ended June 30, 2019, respectively, consisting of convertible preferred stock, stock options and restricted stock units.