Quarterly report pursuant to Section 13 or 15(d)

Note 3 - Revenue Recognition (Details Textual)

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Note 3 - Revenue Recognition (Details Textual)
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Percentage of Revenue From Products Transferred at Point in Time 100.00% 100.00% 100.00% 100.00%