Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Earnings Per Share Reconciliation [Abstract]
Net income attributable to Karat Packaging Inc.	$ 6,409	$ 6,166
Weighted average number of common shares in issue (in shares)	20,036,505	19,969,606
Basic earnings per share (in dollars per share)	$ 0.32	$ 0.31
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Net income attributable to Karat Packaging Inc.	$ 6,409	$ 6,166
Weighted average number of common shares in issue (in shares)	20,036,505	19,969,606
Dilutive shares
Stock options and restricted stock units (in shares)	162,000	105,000
Adjusted weighted average number of common shares (in shares)	20,198,654	20,075,485
Diluted earnings per share (in dollars per share)	$ 0.32	$ 0.31
Potentially dilutive shares excluded from diluted earnings per share calculation (in shares)	0	19,000