Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2021	Dec. 31, 2020	Jul. 17, 2020	Jul. 16, 2020	Jun. 18, 2019	Jun. 17, 2019	May 07, 2014
Statement Of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001					$ 0.001
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000					5,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	100,000,000	100,000,000	100,000,000	250,000,000	250,000,000	125,000,000
Common stock, shares issued (in shares)	28,705,334	19,663,698	10,508,302	105,083,291
Common stock, shares outstanding (in shares)	28,705,334	19,663,698	10,508,302	105,083,291