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Note 13 - Net Income (Loss) Per-share - Reconciliation of Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Net income (loss) $ (1,297) $ (1,297) $ 79
Weighted-average shares of common stock outstanding (in shares)   18,363 17,820
Basic net income (loss) per share (in dollars per share)   $ (0.07) $ 0.00
Net Income (Loss) Attributable to Parent, Diluted, Total   $ (1,297) $ 79
Dilutive options and warrants outstanding (in shares)   0 3,168
Number of shares used in diluted per-share computation (in shares)   18,363 20,988
Diluted net income (loss) per share (in dollars per share)   $ (0.07) $ 0.00