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Stockholders' Equity - Issuance of Common Stock and Warrants (Details) - USD ($)		1 Months Ended	3 Months Ended		9 Months Ended
	Nov. 29, 2019	Jan. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2020	Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Sale of common stock (in shares)					539,152
Exercise price of common stock (in dollars per share)			$ 3.50		$ 3.50
Amount paid for clearing fees		$ 231,000
Offering costs		474,000
Proceeds from sale of common stock		$ 2,300,000
Percentage of gross proceeds used to make payments on note		10.00%
Gross proceeds		$ 275,000
Payments on the Iliad Note					$ 976,000	$ 0
Proceeds from issuance of warrants					1,900,000
Issuance of warrants, January 2020			$ (1,555,000)	$ (103,000)	(197,394)
Proceeds from the exercise of warrants					$ 676,000	$ 0
Note Purchase Agreement
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of gross proceeds used to make payments on note	10.00%
Payments on the Iliad Note		$ 226,000
Institutional Investor
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Sale of common stock (in shares)		688,360	497,472
Exercise price of common stock (in dollars per share)		$ 3.37
Purchase price (in usd per share)		0.625
Private Placement
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Sale of common stock (in shares)			41,680		48,185
Exercise price of common stock (in dollars per share)		$ 4.99	$ 4.9940		$ 4.9940
Amount paid for placement agent commissions		$ 193,000
Amount paid related to expenses for registered direct offering and concurrent private placement		$ 50,000

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