Stockholders' Equity - Equity Issuances (Details) - USD ($)	1 Months Ended				6 Months Ended	26 Months Ended
	May 31, 2020	Apr. 30, 2020	Mar. 31, 2019	Feb. 28, 2018	Jun. 30, 2020	Mar. 31, 2020	Aug. 31, 2018
Class of Stock [Line Items]
Aggregate market of common stock held by non-affiliates			$ 52,800,000
Lincoln Park Agreement
Class of Stock [Line Items]
Aggregate offering amount authorized per agreement			$ 26,000,000.0
Commitment shares issued as consideration per agreement (in shares)			181,510
Number of shares sold (in shares)			250,000
Price of shares sold (in dollars per share)			$ 4.00
Gross price for stock transaction			$ 1,000,000.0
Term of agreement (in months)			36 months
Number of shares allowable to direct for Regular Purchase (in shares)			100,000
Maximum obligation per directed purchase transaction for Regular Purchase			$ 2,500,000
Maximum shares allowed in Accelerated Purchase as percent of shares In Regular Purchase (percent)			300.00%
Maximum shares allowed in Accelerated Purchase as percent of shares traded during specified period (percent)			30.00%
Maximum beneficial ownership allowable per agreement (percent)			9.99%
H.C. Wainwright Sales Amended Agreement
Class of Stock [Line Items]
Aggregate offering amount authorized per agreement			$ 17,600,000				$ 25,000,000.0
Number of shares sold (in shares)					681,034
Gross price for stock transaction					$ 1,300,000
Commission on gross proceeds due to third party (percent)				3.00%
Stock issued (shares)						907,168
Proceeds from issuance of stock						$ 2,300,000
April Purchase Agreement
Class of Stock [Line Items]
Number of shares sold (in shares)		2,162,166
Price of shares sold (in dollars per share)		$ 2.3125
Proceeds from issuance of stock		$ 5,000,009
Number of shares called by warrants issued		1,081,083
Warrant exercise price (in dollars per share)		$ 2.2500
Warrants expiration term		5 years 6 months
May Purchase Agreement
Class of Stock [Line Items]
Number of shares sold (in shares)	2,084,850
Price of shares sold (in dollars per share)	$ 2.0625
Proceeds from issuance of stock	$ 4,300,000
Number of shares called by warrants issued	1,042,425
Warrant exercise price (in dollars per share)	$ 2.0625
Warrants expiration term	5 years 6 months