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Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)
$ / shares in Thousands, $ in Thousands
Jun. 30, 2023
Mar. 31, 2023
Allowance for doubtful accounts receivable $ 964 $ 849
Property, plant and equipment, accumulated Depreciation $ 20,478 $ 19,768
Common stock, par value (in dollars per share) $ 0 $ 0
Common stock, shares authorized (in shares) 25,000,000 25,000,000
Common stock, shares issued (in shares) 5,384,280 5,369,466
Common stock, shares outstanding (in shares) 5,384,280 5,369,466