Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Earnings Per Share Reconciliation [Abstract]
Net income attributable to Karat Packaging Inc.	$ 4,395	$ 7,325	$ 40,467	$ 24,668
Weighted average number of common shares outstanding (in shares)	19,958,578	20,091,476	19,956,814	20,062,277
Basic earnings per share (in dollars per share)	$ 0.22	$ 0.36	$ 2.03	$ 1.23
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Net income attributable to Karat Packaging Inc.	$ 4,395	$ 7,325	$ 40,467	$ 24,668
Weighted average number of common shares outstanding (in shares)	19,958,578	20,091,476	19,956,814	20,062,277
Dilutive shares
Stock options and restricted stock units (in shares)	240,000	110,000	169,000	135,000
Adjusted weighted average number of common shares (in shares)	20,198,857	20,201,285	20,126,446	20,197,218
Diluted earnings per share (in dollars per share)	$ 0.22	$ 0.36	$ 2.01	$ 1.22
Potentially dilutive shares excluded from diluted earnings per share calculation (in shares)	0	644	6,222	215