Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Earnings Per Share Reconciliation [Abstract]
Net income attributable to Karat Packaging Inc.	$ 7,325	$ 9,094	$ 24,668	$ 24,360
Weighted average number of common shares in issue (in shares)	20,091,476	20,017,774	20,062,277	19,993,964
Basic earnings per share (in dollars per share)	$ 0.36	$ 0.45	$ 1.23	$ 1.22
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Net income attributable to Karat Packaging Inc.	$ 7,325	$ 9,094	$ 24,668	$ 24,360
Weighted average number of common shares in issue (in shares)	20,091,476	20,017,774	20,062,277	19,993,964
Dilutive shares
Stock options and restricted stock units (in shares)	110,000	116,000	135,000	114,000
Adjusted weighted average number of common shares (in shares)	20,201,285	20,133,813	20,197,218	20,107,801
Diluted earnings per share (in dollars per share)	$ 0.36	$ 0.45	$ 1.22	$ 1.21
Potentially dilutive shares excluded from diluted earnings per share calculation (in shares)	644	0	215	6,403