Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2021	Dec. 31, 2020
Stockholders' equity
Common stock, shares par value	$ 0.001	$ 0.001
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	62,877,959	59,476,268
Common stock, shares outstanding	62,877,595	59,476,268