Shareholders' Equity - Additional Information (Details)				3 Months Ended	12 Months Ended
	Feb. 25, 2021 shares	Jan. 01, 2021 shares	Jan. 01, 2020	Mar. 31, 2021 Vote $ / shares shares	Dec. 31, 2014 $ / shares shares	Dec. 31, 2020 $ / shares shares
Class Of Stock [Line Items]
Preferred stock, shares authorized				10,000,000		10,000,000
Preferred stock, par value | $ / shares				$ 0.0001		$ 0.0001
Preferred stock, shares outstanding				0		0
Common stock authorized				340,000,000		340,000,000
Common stock par value | $ / shares				$ 0.0001		$ 0.0001
Common stock voting rights description				Holders of our common stock are entitled to one vote for each share of common stock held
Number of vote for each share | Vote				1
Common stock outstanding				139,884,698		137,646,896
Warrant issued to purchase stock				0
Series C Convertible Preferred Stock
Class Of Stock [Line Items]
Warrant issued to purchase stock					56,875
Warrant exercisable term					7 years
Weighted-average exercise price of warrants | $ / shares					$ 2.64
Common Stock
Class Of Stock [Line Items]
Stock issued during period, common stock	54,162			54,162
Maximum | Employee Stock Purchase Plan
Class Of Stock [Line Items]
Percentage of annual increases in number of shares			1.00%
2019 Equity Incentive Plan
Class Of Stock [Line Items]
Increase in share reserve		6,882,344
2019 Equity Incentive Plan | Maximum
Class Of Stock [Line Items]
Percentage of annual increases in number of shares			5.00%