Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Basic and diluted earnings per share:
Net income attributable to Karat Packaging Inc.	$ 6,344	$ 9,583	$ 13,011	$ 11,363
Weighted average number of common shares in issue (in shares)	19,809,417	18,908,648	19,808,505	17,048,160
Basic earnings per share (in dollars per share)	$ 0.32	$ 0.51	$ 0.66	$ 0.67
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Net income attributable to Karat Packaging Inc.	$ 6,344	$ 9,583	$ 13,011	$ 11,363
Weighted average common shares outstanding, basic (in shares)	19,809,417	18,908,648	19,808,505	17,048,160
Dilutive shares
Stock options and restricted stock units (in shares)	118,000	117,000	105,000	117,000
Adjusted weighted average number of common shares (in shares)	19,926,695	19,025,871	19,914,044	17,165,383
Diluted earnings per share (in dollars per share)	$ 0.32	$ 0.50	$ 0.65	$ 0.66
Potentially dilutive shares excluded from diluted earnings per share calculation (in shares)	447,000	144,000	460,000	190,000