Business, basis of presentation, new accounting standards and summary of significant accounting policies - Additional Information (Details) $ / shares in Units, $ in Thousands					3 Months Ended		6 Months Ended
	Nov. 30, 2022 USD ($)	Oct. 31, 2022 USD ($)	May 06, 2022 shares	Apr. 14, 2022 USD ($)	Jun. 30, 2022 USD ($) Extension shares	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) Extension shares	Jun. 30, 2021 USD ($)	May 27, 2022 $ / shares	May 05, 2022 shares	Dec. 31, 2021 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		143,384
Restricted cash					11,250		11,250
Loss from operations					18,841	$ 35,179	45,070	$ 64,457
Interest expense and other financing costs					$ 11,696	$ 7,596	26,108	$ 17,823
Current liabilities over current assets							65,400
Total liabilities over total assets							$ 26,100
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			12,000,000.0		12,000,000		12,000,000			600,000,000.0	12,000,000
Financing Agreement [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Maturity date							Sep. 30, 2022
Number of extensions | Extension					2		2
Financing Agreement [Member] | Forecast
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Extended maturity date	Nov. 30, 2022	Oct. 31, 2022
Financing Agreement [Member] | Minimum [Member] | Forecast
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Threshold value of cash proceeds from equity issuance	$ 7,000	$ 7,000
Merger Agreement | Parent and Merger Sub [Member] | Common Stock [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Stock purchase price | $ / shares									$ 10.00
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				3,900
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