Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share Reconciliation [Abstract]
Net income attributable to Karat Packaging Inc.	$ 20,778	$ 17,517
Weighted average number of ordinary shares in issue (in shares)	18,409,243	15,176,809
Basic earnings per share (in dollars per share)	$ 1.13	$ 1.15
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Net income attributable to Karat Packaging Inc.	$ 20,778	$ 17,517
Weighted average common shares outstanding, basic (in shares)	18,409,243	15,176,809
Dilutive shares
Stock options and restricted stock units (in shares)	157,000	271,000
Adjusted weighted average number of common shares (in shares)	18,566,260	15,447,809
Diluted earnings per share (in dollars per share)	$ 1.12	$ 1.13
Potentially dilutive shares excluded from diluted earnings per share calculation (in shares)	234,072	282,000