Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Unamortized discount	$ 5,600	$ 6,300
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	350,000,000	350,000,000
Common stock, shares issued	190,322,688	185,736,890
Common stock, shares outstanding	186,289,978	181,872,676
Treasury stock, at cost shares	4,032,710	3,864,214
Convertible Notes
Unamortized discount	$ 5,639	$ 6,333