Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share Reconciliation [Abstract]
Net income attributable to Karat Packaging Inc.	$ 9,065	$ 6,096	$ 28,572	$ 19,107
Weighted average number of common shares in issue (in shares)	19,890,646	19,809,417	19,888,244	19,808,813
Basic earnings per share (in dollars per share)	$ 0.46	$ 0.31	$ 1.44	$ 0.96
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Net income attributable to Karat Packaging Inc.	$ 9,065	$ 6,096	$ 28,572	$ 19,107
Weighted average number of common shares in issue (in shares)	19,890,646	19,809,417	19,888,244	19,808,813
Dilutive shares
Stock options and restricted stock units (in shares)	104,000	129,000	75,000	113,000
Adjusted weighted average number of common shares (in shares)	19,994,648	19,938,042	19,962,999	19,922,047
Diluted earnings per share (in dollars per share)	$ 0.45	$ 0.31	$ 1.43	$ 0.96
Potentially dilutive shares excluded from diluted earnings per share calculation (in shares)	0	434,000	285,000	452,000