Stockholders' Equity (Details) $ / shares in Units, $ in Thousands, $ in Millions												3 Months Ended				9 Months Ended		12 Months Ended
	Aug. 23, 2024 USD ($) $ / shares shares	Jul. 24, 2024 USD ($) $ / shares shares	Jun. 26, 2024	Jun. 06, 2024	Apr. 30, 2024 USD ($) Warrant $ / shares shares	Oct. 17, 2023 USD ($) $ / shares shares	Oct. 17, 2023 AUD ($)	Oct. 12, 2023 shares $ / shares	Jun. 19, 2023 Tranches $ / shares shares	Mar. 12, 2019	Nov. 27, 2017 USD ($)	Sep. 30, 2024 USD ($) $ / shares shares	Jun. 30, 2024 shares	Jun. 30, 2023 shares	Mar. 31, 2023 USD ($) shares	Sep. 30, 2024 USD ($) $ / shares shares	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) $ / shares shares	Aug. 30, 2024 $ / shares	Aug. 13, 2024 $ / shares shares
Class of Stock Disclosures [Abstract]
Preferred stock, shares outstanding (in shares)												0				0		0
Common stock, par value (in dollars per share) | $ / shares												$ 0.0001				$ 0.0001		$ 0.0001
Converted warrant | $												$ 4,217			$ 7,623
Period of warrants expected to vest																48 months
Gross proceeds from public stock offering | $																$ 2,403	$ 0
Preferred stock, par value (in dollars per share) | $ / shares												$ 0.0001				$ 0.0001		$ 0.0001
Common stock warrant liability | $												$ 480				$ 480		$ 2,843
Reverse stock split			0.028
Minimum [Member]
Class of Stock Disclosures [Abstract]
Reverse stock split				0.20
Maximum [Member]
Class of Stock Disclosures [Abstract]
Reverse stock split				0.014
At-the-Market Program [Member]
Class of Stock Disclosures [Abstract]
Issuance of common stock, net (in shares)																		18,781
Gross proceeds from public stock offering | $																		$ 2,300
Net proceeds from public stock offering | $																		$ 2,100
Aggregate cash fee paid to underwriter or placement agent																3.00%
April 2024 Offering [Member]
Class of Stock Disclosures [Abstract]
Issuance of common stock, net (in shares)					240,571
Warrants to purchase shares of common stock (in shares)					3,214,288															2,710,734
Exercise price of warrants (in dollars per share) | $ / shares					$ 2.1							$ 2.97				$ 2.97				$ 2.49
No of warrants converted to equity (in shares)												2,651,426
Converted warrant | $												$ 4,200
Gross proceeds before deducting placement agent fees and commissions and offering expenses | $					$ 2,700
Issuance of common stock for pre-funded warrants (in shares)					80,854
Common stock offering price per share (in dollars per share) | $ / shares					$ 8.4
Number of warrants included in each unit | Warrant					1
Warrants to purchase common shares (in shares)					1.50							398,488				398,488
Warrant expiry period					5 years											5 years
Gross proceeds before deducting the placement agent fees and other offering expenses | $					$ 2,700
August 2024 Offering [Member]
Class of Stock Disclosures [Abstract]
Warrants to purchase shares of common stock (in shares)	14,501
Exercise price of warrants (in dollars per share) | $ / shares	$ 3.04425																		$ 2.1
Gross proceeds before deducting the placement agent fees and other offering expenses | $	$ 892,000
Warrants to Purchase Common Stock [Member] | April 2024 Offering [Member]
Class of Stock Disclosures [Abstract]
Warrants to purchase common shares (in shares)					1
Number of trading days					5 days											5 days
Floor price per share (in dollars per share) | $ / shares					$ 2.1							$ 2.1				$ 2.1
Supply Agreement [Member] | Maximum [Member]
Class of Stock Disclosures [Abstract]
Period for ultrafiltration services																10 years
Supply Agreement [Member] | DaVita Warrant [Member]
Class of Stock Disclosures [Abstract]
Warrants to purchase shares of common stock (in shares)									36,830
Common stock, par value (in dollars per share) | $ / shares									$ 0.0001
Exercise price of warrants (in dollars per share) | $ / shares									$ 115.49
Number of tranches | Tranches									4
Supply Agreement [Member] | DaVita Warrant [Member] | Tranche One [Member]
Class of Stock Disclosures [Abstract]
Percentage of warrants expected to vest									25.00%
Supply Agreement [Member] | DaVita Warrant [Member] | Tranche Two [Member]
Class of Stock Disclosures [Abstract]
Percentage of warrants expected to vest									25.00%
Period of warrants expected to vest																12 months
Supply Agreement [Member] | DaVita Warrant [Member] | Tranche Three [Member]
Class of Stock Disclosures [Abstract]
Percentage of warrants expected to vest									25.00%
Period of warrants expected to vest																24 months
Supply Agreement [Member] | DaVita Warrant [Member] | Tranche Four [Member]
Class of Stock Disclosures [Abstract]
Percentage of warrants expected to vest									25.00%
Period of warrants expected to vest																36 months
Supply Agreement [Member] | DaVita Warrant [Member] | Maximum [Member]
Class of Stock Disclosures [Abstract]
Warrants to be exercised for amount of shares ownership percentage in entity									19.90%
Securities Purchase Agreement [Member]
Class of Stock Disclosures [Abstract]
Issuance of common stock, net (in shares)		469,340
Warrants to purchase shares of common stock (in shares)		938,680
Exercise price of warrants (in dollars per share) | $ / shares		$ 3.99
Gross proceeds before deducting placement agent fees and commissions and offering expenses | $		$ 2,000
Common stock offering price per share (in dollars per share) | $ / shares		$ 4.24
Warrant expiry period		5 years
Securities Purchase Agreement [Member] | July 2024 Offering [Member]
Class of Stock Disclosures [Abstract]
Issuance of common stock, net (in shares)		469,340
Warrants to purchase shares of common stock (in shares)		938,680
Exercise price of warrants (in dollars per share) | $ / shares		$ 3.99
Gross proceeds before deducting placement agent fees and commissions and offering expenses | $		$ 2,000
Net proceeds after deducting placement agent fees and commissions and offering expenses | $		$ 1,500
Common stock offering price per share (in dollars per share) | $ / shares		$ 4.24
Warrant expiry period		5 years
Securities Purchase Agreement [Member] | August 2024 Offering [Member]
Class of Stock Disclosures [Abstract]
Issuance of common stock, net (in shares)	483,351
Warrants to purchase shares of common stock (in shares)	483,351
Common stock, par value (in dollars per share) | $ / shares	$ 0.0001
Exercise price of warrants (in dollars per share) | $ / shares	1.72
Common stock offering price per share (in dollars per share) | $ / shares	1.845
Series F Convertible Preferred Stock [Member]
Class of Stock Disclosures [Abstract]
Number of consecutive trading days considered for expiration																20 days
Number of consecutive trading days																30 days
Percentage of volume weighted average price of common stock											300.00%
Trading volume for each trading day | $											$ 7,000
Conversion price (in dollars per share) | $ / shares	$ 542.01
Preferred stock, shares outstanding (in shares)												127				127		127
Preferred stock, par value (in dollars per share) | $ / shares												$ 0.0001				$ 0.0001		$ 0.0001
Series F Convertible Preferred Stock [Member] | Minimum [Member]
Class of Stock Disclosures [Abstract]
Aggregate cash fee paid to underwriter or placement agent										7.00%
Series F Convertible Preferred Stock [Member] | Maximum [Member]
Class of Stock Disclosures [Abstract]
Aggregate cash fee paid to underwriter or placement agent										8.00%
Series J Convertible Preferred Stock [Member] | October 2023 Offering [Member]
Class of Stock Disclosures [Abstract]
Issuance of common stock, net (in shares)								150,000
Warrants to purchase shares of common stock (in shares)								0.5
Number of shares in one unit (in shares)								1
Original issue discount percentage								40.00%
Additional shares issuable upon declaration of dividends (in shares)								362,933
Common stock offering price per share (in dollars per share) | $ / shares								$ 15
Preferred stock, par value (in dollars per share) | $ / shares								$ 0.0001
Number of warrants included in each unit								1
Common Stock [Member]
Class of Stock Disclosures [Abstract]
Issuance of common stock, net (in shares)												952,658	321,417	18,781
No of warrants converted to equity (in shares)															300
Converted warrant | $												$ 0			$ 0
Common Stock [Member] | Series J Convertible Preferred Stock [Member] | October 2023 Offering [Member]
Class of Stock Disclosures [Abstract]
Common stock, par value (in dollars per share) | $ / shares								$ 0.0001
Warrants [Member]
Class of Stock Disclosures [Abstract]
Common stock warrant liability | $						$ 7,800
Warrants [Member] | October 2023 Offering [Member]
Class of Stock Disclosures [Abstract]
Gross proceeds before deducting placement agent fees and commissions and offering expenses | $						2,250
Net proceeds after deducting placement agent fees and commissions and offering expenses | $						$ 1,500
Financing expense | $							$ 2.7
Warrants [Member] | Series J Convertible Preferred Stock [Member] | October 2023 Offering [Member]
Class of Stock Disclosures [Abstract]
Warrants to purchase shares of common stock (in shares)						0.5
Exercise price of warrants (in dollars per share) | $ / shares						$ 262.5
Warrants term												3 years				3 years