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Revenue (Tables)
6 Months Ended
Jun. 30, 2022
Revenue  
Summary of revenue categories

Revenue comprises the following categories (in thousands):

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Three months ended

 

Six months ended

​

 

June 30, 

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June 30, 

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2022

     

2021

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2022

     

2021

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​

​

​

​

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​

​

​

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​

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Development revenue

 

$

5,538

 

$

3,095

​

$

9,113

 

$

3,529

​

 

$

5,538

 

$

3,095

​

$

9,113

 

$

3,529