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Revenue
3 Months Ended
Mar. 31, 2023
Revenue  
Revenue

Note 4. Revenue 

Geographical Net Sales

The following table presents net sales disaggregated by geographic market:  


 


Three months ended March 31,

(in thousands)



2023


2022

Product revenue









United States


$ 2,370
$ 1,594
United Kingdom

321


266
Other

43


39
License revenue







Japan

46



Total Net Sales


$ 2,780

$ 1,899

The Company generally invoices the customer and recognizes revenue once its performance obligations are satisfied, at which point payment is unconditional. Agreed upon payment terms with customers are within 30 days of shipment. Accordingly, contracts with customers do not include a significant financing component.