Business, basis of presentation, new accounting standards and summary of significant accounting policies - Additional Information (Details) $ / shares in Units, $ in Thousands						3 Months Ended				9 Months Ended
	Oct. 28, 2022 USD ($) $ / shares shares	Sep. 30, 2022 USD ($) $ / shares shares	Jul. 29, 2022 USD ($) $ / shares shares	May 06, 2022 shares	Apr. 14, 2022 USD ($)	Sep. 30, 2022 USD ($) $ / shares shares	Sep. 30, 2021 USD ($) shares	Jun. 30, 2021 USD ($) shares	Mar. 31, 2021 USD ($) shares	Sep. 30, 2022 USD ($) $ / shares shares	Sep. 30, 2021 USD ($)	May 05, 2022 shares	Dec. 31, 2021 $ / shares shares
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Proceeds from sale of business, net of transaction costs										$ 142,634
Gain on sale of business										143,384
Restricted cash		$ 11,250				$ 11,250				11,250
Loss from operations						20,747	$ 39,921			65,817	$ 104,378
Interest expense and other financing costs						$ 4,833	7,518			30,941	$ 25,341
Current liabilities over current assets										86,600
Total liabilities over total assets										$ 48,300
Preferred Stock, Par or Stated Value Per Share | $ / shares		$ 0.001				$ 0.001				$ 0.001			$ 0.001
Common Stock, Par or Stated Value Per Share | $ / shares		$ 0.001				$ 0.001				$ 0.001			$ 0.001
Aggregate purchase price						$ 2,454	$ 31,819	$ 163	$ 150,899
Reverse stock split, conversion ratio				0.02						0.02
Reverse stock split, description				outstanding shares of our Common Stock were split at a ratio of 50-for-1						50-for-1 reverse stock split
Number of authorized shares of common stock | shares		12,000,000		12,000,000.0		12,000,000				12,000,000		600,000,000.0	12,000,000
Common Stock [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Shares issued and sold | shares						565,000	575,000	3,000	1,857,000
Aggregate purchase price							$ 1		$ 2
Subscription Agreement [Member] | Rubric Capital Management LP [Member] | Private Placement Offering [Member] | Common Stock [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Shares issued and sold | shares			565,000
Common Stock, Par or Stated Value Per Share | $ / shares			$ 0.001
Aggregate purchase price			$ 2,700
Number of shares for make-whole payment under financing agreement | shares		263,666
Subscription Agreement [Member] | Rubric Capital Management LP [Member] | Private Placement Offering [Member] | Series A Preferred Stock [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Shares issued and sold | shares		7,000	15,000
Preferred Stock, Par or Stated Value Per Share | $ / shares			$ 0.001
Aggregate gross proceeds		$ 7,000	$ 15,000
Aggregate purchase price		$ 7,000	$ 12,300
Subscription Agreement [Member] | Preferred Stock Investor [Member] | Private Placement Offering [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of shares for make-whole payment under financing agreement | shares			263,666
Subscription Agreement [Member] | Preferred Stock Investor [Member] | Private Placement Offering [Member] | Subsequent Event [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of shares for make-whole payment under financing agreement | shares	263,666
Subscription Agreement [Member] | Preferred Stock Investor [Member] | Private Placement Offering [Member] | Preferred Stock [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Shares issued and sold | shares			7,000
Aggregate purchase price			$ 7,000
Maturity date of preferred stock description			(i) the maturity date of the Preferred Stock of December 31, 2022, which shall be automatically extended, on a day-for-day basis, to the extent the maturity date under the Financing Agreement is extended, but by no more than a total of 60 days without the consent of the holders representing at least 66 2/3% of the outstanding shares of Preferred Stock (the “Preferred Stock Maturity Date”)
Maximum number of days for preferred stock maturity date extension			60 days
Percentage of minimum outstanding shares of preferred stock require to consent to extent maturity date			66.6666%
Subscription Agreement [Member] | Preferred Stock Investor [Member] | Private Placement Offering [Member] | Preferred Stock [Member] | Subsequent Event [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Shares issued and sold | shares	7,000
Aggregate gross proceeds	$ 7,000
Aggregate purchase price	$ 7,000
Financing Agreement Amendment No 16 [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Warrants issued to purchase of common stock | shares		125,000	185,000			125,000				125,000
Exercise price of common stock | $ / shares		$ 0.01	$ 0.01			$ 0.01				$ 0.01
Financing Agreement Amendment No 16 [Member] | Subsequent Event [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Warrants issued to purchase of common stock | shares	125,000
Exercise price of common stock | $ / shares	$ 0.01
Financing Agreement Amendment No 16 [Member] | Common Stock [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Warrants issued to purchase of common stock | shares			125,000
Financing Agreement Amendment No 16 [Member] | Maximum [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Threshold value of cash proceeds from equity issuance			$ 7,000
VitaCare Divestiture [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Proceeds from sale of business, net of transaction costs					$ 142,600
Transaction costs					7,200
Gain on sale of business					143,400
Estimated minimum service fee commitment for remainder of fiscal year					2,000
Estimated minimum service fee commitment, due 2023					10,700
Estimated minimum service fee commitment, due 2024					13,400
Estimated minimum service fee commitment, due 2025					15,400
Estimated minimum service fee commitment, due 2026					16,200
Estimated minimum service fee commitment, due 2027					5,500
VitaCare Divestiture [Member] | Maximum [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Contingent cash consideration from sale of business					7,000
VitaCare Divestiture [Member] | Purchase Agreement
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Restricted cash					$ 11,300