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v3.23.1

Summary of Significant Accounting Policies (Details - Options outstanding and exercisable) - shares shares in Thousands | Mar. 31, 2023 | Dec. 31, 2022
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Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items] |  |
Number of shares, outstanding | 10,081 | 11,167
Number of shares, exercisable | 6,871 | 7,770
Range 1 [Member] |  |
Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items] |  |
Number of shares, outstanding | 1,440 | 1,445
Number of shares, exercisable | 770 | 775
$2.00 - $2.99 [Member] |  |
Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items] |  |
Number of shares, outstanding | 3,646 | 3,785
Number of shares, exercisable | 3,356 | 3,495
$3.00 - $3.99 [Member] |  |
Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items] |  |
Number of shares, outstanding | 2,677 | 2,739
Number of shares, exercisable | 1,740 | 1,802
$4.00 - $4.99 [Member] |  |
Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items] |  |
Number of shares, outstanding | 0 | 0
Number of shares, exercisable | 0 | 0
$5.00 - $5.99 [Member] |  |
Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items] |  |
Number of shares, outstanding | 0 | 740
Number of shares, exercisable | 0 | 740
$6.00 - $6.99 [Member] |  |
Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items] |  |
Number of shares, outstanding | 608 | 748
Number of shares, exercisable | 608 | 748
$7.00 - $7.99 [Member] |  |
Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items] |  |
Number of shares, outstanding | 1,710 | 1,710
Number of shares, exercisable | 397 | 210

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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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