Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Earnings Per Share Reconciliation [Abstract]
Net income attributable to Karat Packaging Inc.	$ 29,975	$ 32,470
Weighted average shares (in shares)	20,002,211	19,904,698
Basic earnings per share (in dollars per share)	$ 1.50	$ 1.63
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Net income attributable to Karat Packaging Inc.	$ 29,975	$ 32,470
Weighted average shares (in shares)	20,002,211	19,904,698
Dilutive shares
Stock options and restricted stock units (in shares)	122,000	73,000
Total dilutive shares (in shares)	20,124,284	19,977,712
Diluted earnings per share (in dollars per share)	$ 1.49	$ 1.63
Potentially dilutive shares excluded from diluted earnings per share calculation (in shares)	4,803	213,599