Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Earnings Per Share Reconciliation [Abstract]
Net income attributable to Karat Packaging Inc.	$ 32,470	$ 23,648
Weighted average shares (in shares)	19,904,698	19,824,911
Basic earnings per share (in dollars per share)	$ 1.63	$ 1.19
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Net income attributable to Karat Packaging Inc.	$ 32,470	$ 23,648
Weighted average shares (in shares)	19,904,698	19,824,911
Dilutive shares
Stock options and restricted stock units (in shares)	73,000	101,000
Total dilutive shares (in shares)	19,977,712	19,925,905
Diluted earnings per share (in dollars per share)	$ 1.63	$ 1.19
Potentially dilutive shares excluded from diluted earnings per share calculation (in shares)	213,599	449,223