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Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ / shares in Thousands, $ in Thousands | Mar. 31, 2022 | Jun. 30, 2021
--- | --- | ---
Allowance for doubtful accounts | $ 421 | $ 256
Preferred shares, par value (in dollars per share) | $ 0 | $ 0
Preferred shares, authorized shares (in shares) | 1,000,000 | 1,000,000
Preferred shares, issued (in shares) | 0 | 0
Common shares, par value (in dollars per share) | $ 0 | $ 0
Common shares, authorized shares (in shares) | 50,000,000 | 50,000,000
Common shares, outstanding (in shares) | 26,642,320 | 26,517,836

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