Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2021	Dec. 31, 2020
Statement Of Financial Position [Abstract]
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	231,805,000	231,262,000
Common stock, shares outstanding	231,805,000	231,262,000
Cumulative non-voting convertible preferred stock par value	$ 0.01	$ 0.01
Cumulative non-voting convertible preferred shares authorized	3,000	3,000
Cumulative non-voting convertible preferred shares issued	1,000	1,000
Cumulative non-voting convertible preferred shares outstanding	1,000	1,000