Stockholders' Equity - Common Stock (Details) $ / shares in Units, $ in Millions									1 Months Ended					2 Months Ended	3 Months Ended				6 Months Ended	12 Months Ended
	Jul. 06, 2022 $ / shares shares	Apr. 27, 2022 shares	Apr. 25, 2022 $ / shares shares	Apr. 04, 2022 shares	Mar. 15, 2022 shares	Mar. 14, 2022 USD ($) $ / shares shares	Jan. 10, 2022 USD ($)	Mar. 15, 2021 shares	Oct. 31, 2022 shares	Jul. 31, 2022 USD ($) $ / shares shares	Apr. 30, 2022 shares	Oct. 31, 2021 USD ($) $ / shares shares	Mar. 31, 2021 USD ($) shares	Jun. 30, 2022 USD ($) $ / shares shares	Jun. 30, 2022 $ / shares shares	Mar. 31, 2022 $ / shares shares	Jun. 30, 2021 shares	Mar. 31, 2021 USD ($) shares	Jun. 30, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares	Feb. 28, 2022 $ / shares	Sep. 30, 2021 $ / shares	Feb. 26, 2021 $ / shares shares	Oct. 02, 2020 USD ($)	Feb. 10, 2020 $ / shares
Sale of stock
Fractional Shares Issued Upon Reverse Stock Split											0
Common stock that can be purchased with warrants (in shares)												333,333		1,242,813	1,242,813				1,242,813
Stock stated value | $ / shares														$ 0.0001	$ 0.0001				$ 0.0001	$ 0.0001
Common stock
Sale of stock
Conversion of convertible preferred stock (in shares)				303,125
Common stock | Subsequent Event
Sale of stock
Issuance of common stock (in shares)	19,148,332
Perceptive Warrants | Perceptive Credit Agreement
Sale of stock
Common stock that can be purchased with warrants (in shares)														35,000	35,000				35,000				11,250
Exercise price of warrants (in dollars per share) | $ / shares																							$ 114.80
First Seven Lakhs Shares | Perceptive Credit Agreement
Sale of stock
Common stock that can be purchased with warrants (in shares)										17,500		17,500		17,500	17,500	17,500			17,500
Exercise price of warrants (in dollars per share) | $ / shares										$ 14.90		$ 141.60		$ 105.52	$ 105.52	$ 105.52			$ 105.52		$ 141.60	$ 186.80			$ 149.60
Remaining Seven Lakhs Shares | Perceptive Credit Agreement
Sale of stock
Common stock that can be purchased with warrants (in shares)										17,500		17,500		17,500	17,500	17,500			17,500
Exercise price of warrants (in dollars per share) | $ / shares										$ 12.37		$ 115.20		$ 86.61	$ 86.61	$ 86.61			$ 86.61		115.20	149.60			$ 186.80
Warrants | Perceptive Credit Agreement
Sale of stock
Common stock that can be purchased with warrants (in shares)										11,250		11,250				11,250
Exercise price of warrants (in dollars per share) | $ / shares										$ 10.03		$ 90.80		$ 69.13	$ 69.13	$ 69.13			$ 69.13		$ 90.80	$ 114.80
Series A Warrants | Subsequent Event
Sale of stock
Exercise price of warrants (in dollars per share) | $ / shares	$ 0.90
2020 Shelf Registration Statement
Sale of stock
Aggregate amount of securities issuable | $																								$ 200.0
2022 Preferred Stock Offering
Sale of stock
Common stock that can be purchased with warrants (in shares)						30,313
Proceeds from issuance of common stock in public offering, net of offering costs | $						$ 4.1
Fair Value Of Warrants | $						$ 2.1
Exercise price of warrants (in dollars per share) | $ / shares						$ 10.00
Conversion price | $ / shares						$ 8.00
Preferred Stock, convertible, shares issuable						606,250
Exercisable term						6 months
Stock stated value | $ / shares						$ 1,000
Warrants and rights outstanding, term						5 years
Duration From Offering To Anniversary Of Closing			180 days
2022 Preferred Stock Offering | Strike price
Sale of stock
Warrants, Measurement Input						10.40
2022 Preferred Stock Offering | Fair value
Sale of stock
Warrants, Measurement Input						9.48
2022 Preferred Stock Offering | Series A Warrants
Sale of stock
Common stock that can be purchased with warrants (in shares)			212,188			606,250
Exercise price of warrants (in dollars per share) | $ / shares			$ 10.40			$ 10.40
Exercisable term						6 months
Warrants and rights outstanding, term						5 years
Warrant Exercisable Term			5 years
2022 Preferred Stock Offering | Series A Warrants | Volatility
Sale of stock
Warrants, Measurement Input						1.119
2022 Preferred Stock Offering | Series A Warrants | Risk free interest rate
Sale of stock
Warrants, Measurement Input						0.021
2022 Preferred Stock Offering | Series A Warrants | Expected life
Sale of stock
Warrants, Measurement Input						5.5
2022 Preferred Stock Offering | Series B Warrants
Sale of stock
Common stock that can be purchased with warrants (in shares)						606,250
Exercise price of warrants (in dollars per share) | $ / shares						$ 10.40
Exercisable term						6 months
Warrants and rights outstanding, term						1 year 6 months
2022 Preferred Stock Offering | Series B Warrants | Volatility
Sale of stock
Warrants, Measurement Input						0.697
2022 Preferred Stock Offering | Series B Warrants | Risk free interest rate
Sale of stock
Warrants, Measurement Input						0.016
2022 Preferred Stock Offering | Series B Warrants | Expected life
Sale of stock
Warrants, Measurement Input						1.5
At-the-market sales | Common stock
Sale of stock
Issuance of common stock (in shares)													172,879		8,687,502	25,623	114,826	13,023
Proceeds from issuance of common stock in public offering, net of offering costs | $																				$ 9.3
At-the-market sales | Common stock | Maximum
Sale of stock
Commission percentage													3.00%
Authorized value for shares issuance | $													$ 50.0					$ 50.0
Public offering
Sale of stock
Issuance of common stock (in shares)	19,148,332									7,518,334
Common stock that can be purchased with warrants (in shares)	7,518,334									38,296,664		333,333
Share price (in dollars per share) | $ / shares										$ 0.90
Public offering | Common stock
Sale of stock
Issuance of common stock (in shares)									666,666	19,148,332
Common stock that can be purchased with one-half of warrant (in shares)												1
Share price (in dollars per share) | $ / shares										$ 0.8999		$ 34.00
Proceeds from issuance of common stock in public offering, net of offering costs | $										$ 22.2		$ 21.1
Public offering | Warrants
Sale of stock
Common stock that can be purchased with warrants (in shares)										15,036,668
Public offering | Pre-funded warrants
Sale of stock
Common stock that can be purchased with warrants (in shares)										7,518,334
2022 ATM
Sale of stock
Issuance of common stock (in shares)														8,687,502
Proceeds from issuance of common stock in public offering, net of offering costs | $														$ 12.2
2022 ATM | Common stock
Sale of stock
Issuance of common stock (in shares)																			25,623
Proceeds from issuance of common stock in public offering, net of offering costs | $																			$ 0.3
2022 ATM | Common stock | Maximum
Sale of stock
Commission percentage							3.00%
Authorized value for shares issuance | $							$ 50.0
2022 ATM | New Warrant [Member]
Sale of stock
Warrant Exercisable Term			6 months
H.C. Wainwright & Co., LLC, Sales Agent [Member]
Sale of stock
Commission percentage		3.00%
H.C. Wainwright & Co., LLC, Sales Agent [Member] | Common stock
Sale of stock
Issuance of common stock (in shares)		12,841,000
Series A Preferred Stock
Sale of stock
Conversion of stock shares converted					2,425
Series A Preferred Stock | 2022 Preferred Stock Offering
Sale of stock
Issuance of common stock (in shares)						2,425
Series B Preferred Stock
Sale of stock
Issuance of common stock (in shares)				2,425
Conversion of stock shares converted								303,125
Series B Preferred Stock | 2022 Preferred Stock Offering
Sale of stock
Issuance of common stock (in shares)						2,425