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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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CONDENSED CONSOLIDATED BALANCE SHEETS |  |
Accounts receivable, reserves (in dollars) | $ 817 | $ 1,289
Preferred shares, no par value | $ 0 | $ 0
Preferred shares, authorized | 5,000,000 | 5,000,000
Preferred shares, issued | 0 | 0
Common shares, no par value | $ 0 | $ 0
Common shares, authorized | 60,000,000 | 60,000,000
Common shares, issued | 28,966,000 | 28,966,000
Common shares, outstanding | 27,006,000 | 27,408,000
Common shares held in treasury, shares | 1,960,000 | 1,558,000

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