Stockholders' Equity - Schedule of Warrants Outstanding (Details)	Sep. 30, 2019 $ / shares shares
Warrants Expiring November 1, 2020
Class of Stock [Line Items]
Warrants outstanding (in shares) | shares	1,866,831
Warrants exercise price (in USD per share) | $ / shares	$ 8.16
Warrants Expiring September 12, 2022
Class of Stock [Line Items]
Warrants outstanding (in shares) | shares	810,357
Warrants exercise price (in USD per share) | $ / shares	$ 6.72