| Other information related to leases was as follows: (Details) - USD ($) $ in Thousands | 12 Months Ended | |
|---|---|---|
| Dec. 31, 2021 | Dec. 31, 2020 | |
| Leases | ||
| Operating cash flow from operating leases | $ 632 | $ 540 | 
| Weighted average remaining lease term operating leases | 2 years 8 months 15 days | 3 years 3 months 7 days | 
| Weighted average discount rate operating leases | 1.34% | 1.42% | 
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- References No definition available. 
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- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Weighted average discount rate for operating lease calculated at point in time. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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| X | ||||||||||
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- Definition Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/exampleRef 
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