Consolidated balance sheets (Parenthetical) - $ / shares	Dec. 31, 2019	Nov. 12, 2019	Dec. 31, 2018
Common stock, par value	$ 0.000001		$ 0.000001
Common stock, shares authorized	100,000,000	100,000,000	50,000,000
Common stock, shares issued	37,996,849		23,537,368
Common stock, shares outstanding	37,996,849		23,537,368
Preferred stock, par value	$ 0.000001		$ 0.000001
Preferred stock, shares authorized	5,000,000		5,000,000
Preferred stock, shares issued	0		0
Preferred stock, shares outstanding	0		0