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Intangible assets (Tables)
3 Months Ended
Mar. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Intangible Assets
Intangible assets consisted of the following:
March 31, 2023
Gross
carrying
amount
Accumulated
amortization
Net book
value
License$37,873 $19,857 $18,016 
Technology52,700 5,881 46,819 
IPR&D64,010 64,010 
$154,583 $25,738 $128,845 
Schedule of Estimated Amortization Expense on Intangible Assets
Amortization expense on intangible assets subject to amortization is estimated to be as follows for each of the next five years ended March 31:
Amortization
Expense
2024$10,599 
20254,241 
20264,241 
20274,241 
20284,241 
$27,563