Net Income per Share (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Net Income per Share [Abstract]
Weighted average number of common shares outstanding - basic (in shares)	10,722,401	10,722,401	10,722,401	10,722,401
Potential shares exercisable under stock option plans (in shares)	227,357	335,137	257,679	305,236
Less: Shares which could be repurchased under treasury stock method (in shares)	(192,697)	(250,220)	(218,358)	(225,461)
Weighted average number of common shares outstanding - diluted (in shares)	10,757,061	10,807,318	10,761,722	10,802,176
Stock Options [Member]
Antidilutive Securities Excluded from Computation [Abstract]
Antidilutive securities excluded from computation of earnings per share (in shares)	645,050	392,600	615,050	423,900