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Note 8 - Capital Stock and Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Share-based compensation | $ 1,239 | $ 1,164 | $ 2,262 | $ 2,132
Continuing Operations [Member] | Cost of Sales [Member] |  |  |  |
Share-based compensation | 52 | 31 | 88 | 51
Continuing Operations [Member] | Selling and Marketing Expense [Member] |  |  |  |
Share-based compensation | 192 | 131 | 346 | 224
Continuing Operations [Member] | General and Administrative Expense [Member] |  |  |  |
Share-based compensation | 923 | 969 | 1,714 | 1,803
Continuing Operations [Member] | Research and Development Expense [Member] |  |  |  |
Share-based compensation | $ 72 | $ 33 | $ 114 | $ 54

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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