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Statements of Changes in Stockholders' Equity (Unaudited) - USD ($)
Common Stock [Member]
Treasury Stock, Common [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Total
Balances (in shares) at Dec. 31, 2023 2,014,283        
Balances at Dec. 31, 2023 $ 59,335 $ (263,748) $ 3,150,376 $ 15,372,095 $ 18,318,058
Net income 0 0 0 218,065 218,065
Share-based compensation $ 0 0 223,626 0 223,626
Issuances under share-based compensation (in shares) 51,761        
Issuances under share-based compensation $ 0 0 0 0 0
Repurchases of common stock $ 0 (208,854) 0   (208,854)
Balances (in shares) at Sep. 30, 2024 2,066,044        
Balances at Sep. 30, 2024 $ 59,335 (472,602) 3,374,002 15,590,160 18,550,895
Balances (in shares) at Jun. 30, 2024 2,066,044        
Balances at Jun. 30, 2024 $ 59,335 (472,602) 3,361,386 15,536,044 18,484,163
Net income 0 0 0 54,116 54,116
Share-based compensation $ 0 0 12,616 0 12,616
Balances (in shares) at Sep. 30, 2024 2,066,044        
Balances at Sep. 30, 2024 $ 59,335 (472,602) 3,374,002 15,590,160 18,550,895
Balances (in shares) at Dec. 31, 2024 2,066,044        
Balances at Dec. 31, 2024 $ 59,335 (472,602) 3,374,002 15,622,319 18,583,054
Net income $ 0 0 0 442,919 442,919
Issuances under share-based compensation (in shares) 36,551        
Issuances under share-based compensation $ 0 0 0 0 0
Repurchases of common stock $ 0 (147,614) 0 0 (147,614)
Balances (in shares) at Sep. 30, 2025 2,102,595        
Balances at Sep. 30, 2025 $ 59,335 (620,216) 3,374,002 16,065,238 18,878,359
Balances (in shares) at Jun. 30, 2025 2,102,595        
Balances at Jun. 30, 2025 $ 59,335 (620,216) 3,374,002 15,898,934 18,712,055
Net income $ 0 0 0 166,304 166,304
Balances (in shares) at Sep. 30, 2025 2,102,595        
Balances at Sep. 30, 2025 $ 59,335 $ (620,216) $ 3,374,002 $ 16,065,238 $ 18,878,359