Subsequent Events (Details) - $ / shares	Aug. 08, 2019	Jun. 30, 2019	Dec. 31, 2018	Jun. 22, 2018
Subsequent Events [Abstract]
Common stock, par value (in dollars per share)		$ 0.001	$ 0.001	$ 0.001
Subsequent Event [Line Items]
Common stock, shares authorized (in shares)		800,000,000	800,000,000	800,000,000
Subsequent Event
Subsequent Event [Line Items]
Common stock, shares authorized (in shares)	30,000,000