Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2019	Dec. 31, 2018	Jul. 27, 2018	Apr. 30, 2018	Mar. 31, 2018
Stockholders' (deficit)/equity:
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	250,000,000	250,000,000	250,000,000	350,000,000	25,000
Common stock, shares issued (in shares)	33,562,885	24,957,309
Common stock, shares outstanding (in shares)	33,562,885	24,957,309