Nature of Business and Basis of Presentation - Reverse Stock Split (Details)	Oct. 10, 2018 $ / shares shares	Oct. 09, 2018 $ / shares shares	Sep. 30, 2018 $ / shares shares
Class of Stock [Line Items]
Common stock, shares authorized			300,000,000
Common stock, par value (in dollars per share) | $ / shares			$ 0.01
Subsequent Event
Class of Stock [Line Items]
Reverse stock split ratio	0.0833
Common stock, shares outstanding	90,811,562	1,089,738,735
Common stock, shares authorized	300,000,000	3,500,000,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.01	$ 0.00001