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Employee benefits (Tables)
12 Months Ended
Dec. 31, 2022
Employee benefits  
Schedule of reconciliations of defined benefit obligation at present value and plan asset at fair value

    

December 31, 

    

December 31, 

2021

2022

(in thousands)

Present value of the defined benefit obligations

$

3,489

3,060

Fair value of plan assets

 

(4,065)

 

(4,307)

Prepaid pension costs

$

(576)

 

(1,247)

Schedule of movements in present value of the defined benefit obligations

Year ended December 31, 

    

2021

    

2022

(in thousands)

Balance at beginning of year

$

3,562

 

3,489

Service costs

 

-

 

4

Interest expense

 

15

 

27

Remeasurements loss (gain):

 

  

 

  

Actuarial loss (gain) arising from:

 

 

-Changes in demographic assumptions

 

32

 

24

-Experience adjustment

 

116

 

167

-Change in financial assumptions

 

(253)

 

(551)

Effect of changes in exchange rates

 

17

 

(100)

Balance at end of year

$

3,489

 

3,060