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Lease Commitments - Operating and financing leases - (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 | Dec. 31, 2019
Lease Commitments |  |
Operating lease, Within 1 year | $ 118 | $ 118
Operating lease, After 1 year but within 2 years | 120 | 120
Operating lease, After 2 years but within 3 years | 85 | 98
Operating lease, After 3 years but within 4 years | 69 | 69
Operating lease, After 4 years but within 5 years | 69 | 69
Operating lease, After 5 years | 573 | 589
Total undiscounted cash flows | 1,034 | 1,063
Discount on cash flows | (192) | (198)
Total lease liabilities | 842 | 865
Financing lease, Within 1 year | 302 | 296
Financing lease, After 1 year but within 2 years | 289 | 275
Financing lease, After 2 years but within 3 years | 291 | 277
Financing lease, After 3 years but within 4 years | 276 | 274
Financing lease, After 4 years but within 5 years | 251 | 236
Financing lease, After 5 years | 2,943 | 3,007
Total undiscounted cash flows | 4,352 | 4,365
Discount on cash flows | (1,175) | (1,202)
Total lease liabilities | $ 3,177 | $ 3,163

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