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LEASE COMMITMENTS - Operating and financing leases - (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
LEASE COMMITMENTS    
Operating lease, Within 1 year $ 118  
Operating lease, After 1 year but within 2 years 120  
Operating lease, After 2 years but within 3 years 98  
Operating lease, After 3 years but within 4 years 69  
Operating lease, After 4 years but within 5 years 69  
Operating lease, After 5 years 589  
Total undiscounted cash flows 1,063  
Discount on cash flows (198)  
Total lease liabilities 865 $ 0
Financing lease, Within 1 year 296  
Financing lease, After 1 year but within 2 years 275  
Financing lease, After 2 years but within 3 years 277  
Financing lease, After 3 years but within 4 years 274  
Financing lease, After 4 years but within 5 years 236  
Financing lease, After 5 years 3,007  
Total undiscounted cash flows 4,365  
Discount on cash flows (1,202)  
Total lease liabilities $ 3,163 $ 0