Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share Reconciliation [Abstract]
Net income attributable to Karat Packaging Inc.	$ 9,005	$ 6,667
Weighted average shares (in shares)	19,886,585	19,807,584
Basic earnings per share (in dollars per share)	$ 0.45	$ 0.34
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Net income attributable to Karat Packaging Inc.	$ 9,005	$ 6,667
Weighted average shares (in shares)	19,886,585	19,807,584
Dilutive shares
Stock options and restricted stock units (in shares)	53,000	93,000
Total dilutive shares (in shares)	19,939,923	19,901,384
Diluted earnings per share (in dollars per share)	$ 0.45	$ 0.34
Potentially dilutive shares excluded from diluted earnings per share calculation (in shares)	434,000	474,000