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Shareholders' Equity (Details - Options outstanding and exercisable) - shares
shares in Thousands
Dec. 31, 2024
Dec. 31, 2023
Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items]    
Number of shares, outstanding 6,097 8,125
Number of shares, exercisable 5,087 6,062
$2.00 - $2.99 [Member]    
Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items]    
Number of shares, outstanding 1,197 1,410
Number of shares, exercisable 1,197 1,082
$3.00 - $3.99 [Member]    
Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items]    
Number of shares, outstanding 2,026 2,473
Number of shares, exercisable 2,026 2,473
$4.00 - $4.99 [Member]    
Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items]    
Number of shares, outstanding 1,262 2,539
Number of shares, exercisable 972 1,929
$10.00 - $10.99 [Member]    
Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items]    
Number of shares, outstanding 1,612 1,703
Number of shares, exercisable 892 578