Common Stock, Convertible Preferred Stock and Stockholders' Equity (Deficit) - Common Stock (Details)		1 Months Ended	6 Months Ended
	Mar. 19, 2020 item shares	Feb. 29, 2020 USD ($) $ / shares shares	Mar. 31, 2019 USD ($) shares	Mar. 31, 2020 USD ($) shares	Jan. 27, 2020 individual	Sep. 30, 2019 USD ($)
Convertible Preferred Stock And Stockholders' Equity (Deficit) [Line Items]
Sale of common stock (in shares)	7,244,739		2,680,390
Number of warrants issued				6,463,338
Net proceeds | $			$ 19,800,000
Warrants outstanding | $				$ 53,592		$ 255,734
Number of principals | item	4
Number of executive officers	2				2
Direct registered offering
Convertible Preferred Stock And Stockholders' Equity (Deficit) [Line Items]
Sale of common stock (in shares)		7,598,426
Number of warrants issued		3,799,213
Shares issued, price per share | $ / shares		$ 1.016
Net proceeds | $		$ 6,700,000
Private Placement
Convertible Preferred Stock And Stockholders' Equity (Deficit) [Line Items]
Sale of common stock (in shares)		2,460,630
Number of warrants issued		1,230,315
Shares issued, price per share | $ / shares		$ 1.016
Net proceeds | $		$ 2,500,000
Exercise price per share | $ / shares		$ 0.9535
Warrants exercise term		4 years
Placement Agent
Convertible Preferred Stock And Stockholders' Equity (Deficit) [Line Items]
Number of warrants issued		531,890
Exercise price per share | $ / shares		$ 1.27
Warrants exercise term		5 years