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Note 11 - Foreign Operations (Details Textual) - USD ($) | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
INDIA |  |
Assets, Noncurrent, Total | $ 156,000 | $ 153,000
Foreign [Member] |  |
Assets, Noncurrent, Total | 1,958,000 | 1,226,000
Liabilities, Total | $ 1,754,000 | $ 1,267,000

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