Stockholders' Equity - Warrants (Details)	3 Months Ended
	Dec. 31, 2019 $ / shares shares
Class of Warrant or Right [Line Items]
Warrants exercise price (in dollars per share) | $ / shares	$ 0.05
Number of warrants exercised (in shares) | shares	298,481
August 2020
Class of Warrant or Right [Line Items]
Number of underlying shares (in shares) | shares	4,500
Warrants exercise price (in dollars per share) | $ / shares	$ 5.00