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Revenue Recognition - Nature of Goods and Services (Details)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2025
USD ($)
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
agreement
segment
Jun. 30, 2024
USD ($)
Dec. 31, 2024
Revenue Recognition [Line Items]          
Number of operating segments | segment     1    
Customers average payment term     30 days    
Distributors average payment term     60 days    
Number of distribution and license agreements | agreement     3    
Net revenue $ 16,071 $ 25,832 $ 34,985 $ 48,508  
Concentrate Products          
Revenue Recognition [Line Items]          
Net revenue 16,071 $ 25,820 34,660 $ 48,485  
Da Vita Healthcare Partners Inc | Concentrate Products          
Revenue Recognition [Line Items]          
Net revenue $ 300   1,300    
Sun Pharma, Jeil Pharma, and Drogsan Pharma          
Revenue Recognition [Line Items]          
Deferred revenue     $ 300    
Da Vita Healthcare Partners Inc | Revenue Benchmark | Customer Concentration Risk          
Revenue Recognition [Line Items]          
Customer concentration, percentage 11.00% 45.00% 20.00% 44.00%  
Da Vita Healthcare Partners Inc | Accounts Receivable | Customer Concentration Risk          
Revenue Recognition [Line Items]          
Customer concentration, percentage     5.00%   20.00%
Nipro Medical Corporation | Revenue Benchmark | Customer Concentration Risk          
Revenue Recognition [Line Items]          
Customer concentration, percentage 11.00% 7.00% 9.00% 6.00%  
Nipro Medical Corporation | Accounts Receivable | Customer Concentration Risk          
Revenue Recognition [Line Items]          
Customer concentration, percentage     15.00%    
Fresenius Medical Care North America | Revenue Benchmark | Customer Concentration Risk          
Revenue Recognition [Line Items]          
Customer concentration, percentage 10.00% 8.00% 10.00% 7.00%  
Fresenius Medical Care North America | Accounts Receivable | Customer Concentration Risk          
Revenue Recognition [Line Items]          
Customer concentration, percentage     11.00%