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Business, basis of presentation, new accounting standards and summary of significant accounting policies - Additional Information (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended
Jun. 29, 2023
USD ($)
$ / shares
shares
Dec. 30, 2022
USD ($)
Dec. 04, 2022
USD ($)
May 06, 2022
shares
Apr. 14, 2022
USD ($)
Jun. 30, 2023
USD ($)
$ / shares
shares
Jun. 26, 2023
shares
May 01, 2023
$ / shares
shares
Dec. 31, 2022
USD ($)
$ / shares
shares
May 05, 2022
shares
Business Basis Of Presentation New Accounting Standards And Summary Of Significant Accounting Policies [Line Items]                    
Common stock par or stated value per share | $ / shares           $ 0.001     $ 0.001  
Gross proceeds from issuance of shares           $ 1,150        
Revised common stock shares authorized | shares             32,000,000      
Purchase of transferred assets and grant of licenses cash payment   $ 140,000                
Acquisition of net working capital   12,100                
Cash received for prepaid royalties   1,000                
Restricted cash                 $ 11,250  
Reverse stock split, description       outstanding Common Stock were split at a ratio of 50-for-1            
Reverse stock split, conversion ratio       0.02            
Number of authorized shares of common stock | shares       12,000,000   32,000,000 12,000,000   12,000,000 600,000,000
VitaCare Divestiture [Member]                    
Business Basis Of Presentation New Accounting Standards 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          
VitaCare Divestiture [Member] | Maximum [Member]                    
Business Basis Of Presentation New Accounting Standards And Summary Of Significant Accounting Policies [Line Items]                    
Contingent cash consideration from sale of business         7,000          
Mayne License Agreement [Member]                    
Business Basis Of Presentation New Accounting Standards And Summary Of Significant Accounting Policies [Line Items]                    
Period of royalty payments     20 years              
Decrease in royalty rate on product-by-product basis     2.00%              
Minimal annual royalty payment     $ 3,000              
Period of minimal annual royalty payment     12 years              
Inflation rate adjusted for minimal annual royalty payment     3.00%              
Prepaid royalty liabilities   1,000                
Quarterly royalty payment   $ 257                
Quarterly royalty payment, interest per annum   19.00%                
Royalty payment payable under long term service agreement   $ 1,500                
Cash received in acquire businesses   140,000                
Proceeds from acquire businesses net of working capital adjustments   $ 12,100                
Mayne License Agreement [Member] | VitaCare Divestiture [Member]                    
Business Basis Of Presentation New Accounting Standards And Summary Of Significant Accounting Policies [Line Items]                    
Consideration assumed by the buyer         1,500          
Purchase Agreement [Member] | VitaCare Divestiture [Member]                    
Business Basis Of Presentation New Accounting Standards And Summary Of Significant Accounting Policies [Line Items]                    
Restricted cash         $ 11,300          
Milestone Payments One [Member] | Mayne License Agreement [Member]                    
Business Basis Of Presentation New Accounting Standards And Summary Of Significant Accounting Policies [Line Items]                    
One-time milestone payments     $ 5,000              
Threshold net sales amount to determine one-time milestone payment     100,000              
Milestone Payments Two [Member] | Mayne License Agreement [Member]                    
Business Basis Of Presentation New Accounting Standards And Summary Of Significant Accounting Policies [Line Items]                    
One-time milestone payments     10,000              
Threshold net sales amount to determine one-time milestone payment     200,000              
Milestone Payments Three Member | Mayne License Agreement [Member]                    
Business Basis Of Presentation New Accounting Standards And Summary Of Significant Accounting Policies [Line Items]                    
One-time milestone payments     15,000              
Threshold net sales amount to determine one-time milestone payment     $ 300,000              
First $80 Million in Annual Net Sales [Member] | Mayne License Agreement [Member]                    
Business Basis Of Presentation New Accounting Standards And Summary Of Significant Accounting Policies [Line Items]                    
Royalty rate as percentage on net sales     8.00%              
Threshold annual net sales to determine royalty rate     $ 80,000              
Above $80 Million in Annual Net Sales [Member] | Mayne License Agreement [Member]                    
Business Basis Of Presentation New Accounting Standards And Summary Of Significant Accounting Policies [Line Items]                    
Royalty rate as percentage on net sales     7.50%              
Threshold annual net sales to determine royalty rate     $ 80,000              
Subscription Agreement [Member] | Rubric Capital LP [Member]                    
Business Basis Of Presentation New Accounting Standards And Summary Of Significant Accounting Policies [Line Items]                    
Common stock par or stated value per share | $ / shares               $ 0.001    
Stock issued during period shares new shares issued | shares 312,525                  
Sale of stock, price per share | $ / shares $ 3.6797                  
Gross proceeds from issuance of shares $ 1,150                  
Number of authorized shares of common stock | shares               5,000,000