Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Earnings Per Share Reconciliation [Abstract]
Net income attributable to Karat Packaging Inc.	$ 23,648	$ 20,778
Weighted average shares (in shares)	19,824,911	18,409,243
Basic earnings per share (in dollars per share)	$ 1.19	$ 1.13
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Net income attributable to Karat Packaging Inc.	$ 23,648	$ 20,778
Weighted average shares (in shares)	19,824,911	18,409,243
Dilutive shares
Stock options and restricted stock units (in shares)	101,000	157,000
Total dilutive shares (in shares)	19,925,905	18,566,260
Diluted earnings per share (in dollars per share)	$ 1.19	$ 1.12
Potentially dilutive shares excluded from diluted earnings per share calculation (in shares)	449,223	234,072