Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Earnings Per Share Reconciliation [Abstract]
Net income attributable to Karat Packaging Inc.	$ 9,094	$ 9,065	$ 24,360	$ 28,572
Weighted average number of common shares in issue (in shares)	20,017,774	19,890,646	19,993,964	19,888,244
Basic earnings per share (in dollars per share)	$ 0.45	$ 0.46	$ 1.22	$ 1.44
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Net income attributable to Karat Packaging Inc.	$ 9,094	$ 9,065	$ 24,360	$ 28,572
Weighted average number of common shares in issue (in shares)	20,017,774	19,890,646	19,993,964	19,888,244
Dilutive shares
Stock options and restricted stock units (in shares)	116,000	104,000	114,000	75,000
Adjusted weighted average number of common shares (in shares)	20,133,813	19,994,648	20,107,801	19,962,999
Diluted earnings per share (in dollars per share)	$ 0.45	$ 0.45	$ 1.21	$ 1.43
Potentially dilutive shares excluded from diluted earnings per share calculation (in shares)	0	0	6,403	285,000