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Consolidated Statements of Income (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Revenue $ 9,857 $ 7,043
Selling, general and administrative expenses 5,844 2,655
Depreciation and amortization 697 499
Income from operations 3,316 3,889
Other miscellaneous income (expense) 43 (3,379)
Interest income 46 94
Interest and other financing expense (540) (48)
Net income before income taxes 2,865 556
Provision for income taxes 547 65
Net income from continuing operations 2,318 491
Income from discontinued operations, net of tax 312 112
Net income $ 2,630 $ 603
Basic earnings per share    
Continuing operations (in dollars per share) $ 0.17 $ 0.04
Discontinued operations (in dollars per share) 0.02 0
Total (in dollars per share) 0.19 0.04
Diluted earnings per share    
Continuing operations (in dollars per share) 0.17 0.04
Discontinued operations (in dollars per share) 0.02 0
Total (in dollars per share) $ 0.19 $ 0.04
Weighted average shares outstanding    
Basic (in shares) 13,707 13,526
Diluted (in shares) 13,782 13,659
Royalty [Member]    
Revenue $ 9,323 $ 6,575
Service [Member]    
Revenue $ 534 $ 468