Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share Reconciliation [Abstract]
Net income attributable to Karat Packaging Inc.	$ 6,166	$ 9,005
Weighted average shares (in shares)	19,969,606	19,886,585
Basic earnings per share (in dollars per share)	$ 0.31	$ 0.45
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Net income attributable to Karat Packaging Inc.	$ 6,166	$ 9,005
Weighted average shares (in shares)	19,969,606	19,886,585
Dilutive shares
Stock options and restricted stock units (in shares)	105,000	53,000
Adjusted weighted average number of common shares (in shares)	20,075,485	19,939,923
Diluted earnings per share (in dollars per share)	$ 0.31	$ 0.45
Potentially dilutive shares excluded from diluted earnings per share calculation (in shares)	19,000	434,000