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Condensed Consolidated Statements of Operations (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Revenues:        
Revenues $ 430 $ 838 $ 1,542 $ 2,453
Cost of revenues:        
Cost of revenues 9 23 24 64
Gross margin 421 815 1,518 2,389
Operating expenses:        
Research and development 794 822 2,843 2,692
Sales and marketing 466 484 1,704 1,844
General and administrative 862 734 2,747 2,696
Total operating expenses 2,122 2,040 7,294 7,232
Gain from patent assignment 19,389 0 19,389 0
Broker fee from patent assignment (3,878) 0 (3,878) 0
Operating income (loss) 13,810 (1,225) 9,735 (4,843)
Other income, net 124 171 405 455
Income (loss) before provision for income taxes (13,934) 1,054 (10,140) 4,388
Provision for income taxes 0 (11) (10) 10
Income (loss) from continuing operations 13,934 (1,043) 10,150 (4,398)
Income (loss) from discontinued operations 250 (44) 433 (468)
Net income (loss) $ 14,184 $ (1,087) $ 10,583 $ (4,866)
Income (loss) per common share:        
Basic and diluted income (loss) per share from continuing operations (in dollars per share) $ 0.83 $ (0.07) $ 0.6 $ (0.28)
Basic and diluted income (loss) per share from discontinued operations (in dollars per share) 0.01 0 0.03 (0.03)
Basic and diluted net income (loss) per share(a) (in dollars per share) $ 0.85 $ (0.07) $ 0.63 $ (0.31)
Basic and diluted – weighted average number of common shares outstanding (in shares) 16,783 15,980 16,783 15,568
License Fees [Member]        
Revenues:        
Revenues $ 406 $ 731 $ 1,307 $ 2,118
Non-recurring Engineering [Member]        
Revenues:        
Revenues 24 107 235 335
Cost of revenues:        
Cost of revenues $ 9 $ 23 $ 24 $ 64