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Present value of net minimum lease payments (Details)
$ in Thousands
Dec. 31, 2021
USD ($)
Finance Leases [Member]  
Lessee, Lease, Description [Line Items]  
  $ 293
  296
  300
  305
  310
  4,899
  6,403
  (2,296)
  4,107
Operating Leases [Member]  
Lessee, Lease, Description [Line Items]  
  227
  167
  129
  136
  136
  381
  1,176
  (155)
  $ 1,021