Liquidity and Going Concern Considerations (Details) - USD ($)						1 Months Ended	12 Months Ended
	Jun. 16, 2022	Jun. 15, 2022	Jun. 02, 2022	May 30, 2022	Apr. 06, 2022	May 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Nov. 10, 2022	Apr. 08, 2022	Sep. 30, 2021	Dec. 31, 2020	Mar. 16, 2020
Liquidity and Going Concern [Line Items]
Accumulated deficit							$ (388,759,000)	$ (370,080,000)
Stockholders' equity							14,106,000	2,535,000				$ 34,170,000
Cash and cash equivalents and investments available-for-sale							21,500,000
Working capital							17,600,000
Net cash used in operating activities							(17,414,000)	$ (33,534,000)
Minimum cash covenant							10,000,000
Net proceeds			$ 14,900,000
Term loan | Term loan
Liquidity and Going Concern [Line Items]
Aggregate principal amount									$ 5,000,000		$ 7,500,000		$ 35,000,000
PIPE Purchase Agreement Warrant
Liquidity and Going Concern [Line Items]
Number of shares of common stock for which warrant is exercisable (in shares)				9,900,990
Purchase price, PIPE warrant (dollars per share)				$ 0.125
PIPE Purchase Agreement Pre-Funded Warrant
Liquidity and Going Concern [Line Items]
Number of shares of common stock for which warrant is exercisable (in shares)				1,267,897
Exercise price of warrant (in dollars per share)				$ 0.0001
Common stock issuable under pre-funded warrants
Liquidity and Going Concern [Line Items]
Number of shares of common stock for which warrant is exercisable (in shares)				7,788,480
Discount, pre-funded warrant (dollars per share)				$ 0.0001
Registered Direct Offering
Liquidity and Going Concern [Line Items]
Preferred shares sold (in shares)				844,613
Stock price (in dollars per share)				$ 1.39
Registered Direct Offering | Common stock issuable under pre-funded warrants
Liquidity and Going Concern [Line Items]
Discount, pre-funded warrant (dollars per share)				0.0001
Exercise price of warrant (in dollars per share)				$ 0.0001
Series X Convertible Preferred Stock
Liquidity and Going Concern [Line Items]
Sale of stock consideration					$ 15,000,000
Net proceeds					14,900,000
DaVita | Share Issuance, Tranche One
Liquidity and Going Concern [Line Items]
Proceeds from issuance of convertible preferred stock					7,500,000
DaVita | Share Issuance, Tranche Two
Liquidity and Going Concern [Line Items]
Proceeds from issuance of convertible preferred stock	$ 7,500,000	$ 7,500,000
DaVita | Series X Convertible Preferred Stock | Private Placement
Liquidity and Going Concern [Line Items]
Consideration authorized					$ 15,000,000
Sale of stock consideration		$ 15,000,000
Stock price (in dollars per share)					$ 1,000
DaVita | Series X Convertible Preferred Stock | Private Placement | Share Issuance, Tranche One
Liquidity and Going Concern [Line Items]
Preferred shares sold (in shares)					7,500
DaVita | Series X Convertible Preferred Stock | Private Placement | Share Issuance, Tranche Two
Liquidity and Going Concern [Line Items]
Preferred shares sold (in shares)	7,500	7,500
Cantor Fitzgerald & Co | Controlled Equity Offering
Liquidity and Going Concern [Line Items]
Consideration authorized							$ 12,200,000			$ 12,200,000
Preferred shares sold (in shares)						7,500
Sale of stock consideration						$ 15,135