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Inccome taxes (Details - Reconciliation) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Income Tax Disclosure [Abstract] |  |
Federal income tax expense at statutory rate | $ 1,179 | $ 1,015
Federal income tax expense computed at the statutory rate, percentage | 21.00% | 21.00%
State and local tax expense, net | $ 440 | $ 428
State and local tax expense, net, percentage | 7.80% | 8.90%
Other permanent differences | $ 6 | $ 12
Other permanent differences, percentage | 0.10% | 0.30%
Section 162m | $ 206 | $ 296
Section 162m, percentage | 3.70% | 6.10%
Stock based compensation | $ 100 | $ 157
Stock based compensation, percentage | 1.80% | 3.20%
Uncertain tax positions | $ 218 | $ (43)
Uncertain tax positions, percentage | 3.90% | 0.90%
Change in tax rates | $ 198 | $ (245)
Change in tax rates, percentage | 3.40% | 5.00%
Other | $ (42) | $ (24)
Other, percentage | 0.70% | 0.50%
Provision for income taxes | $ 2,305 | $ 1,596
Provision for income taxes, percentage | 41.00% | 33.10%

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