Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Basic and diluted earnings per share:
Net income attributable to Karat Packaging Inc.	$ 6,096	$ 3,786	$ 19,107	$ 15,149
Weighted average number of common shares in issue (in shares)	19,809,417	19,710,043	19,808,813	17,945,205
Basic earnings per share (in dollars per share)	$ 0.31	$ 0.19	$ 0.96	$ 0.84
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Net income attributable to Karat Packaging Inc.	$ 6,096	$ 3,786	$ 19,107	$ 15,149
Weighted average common shares outstanding, basic (in shares)	19,809,417	19,710,043	19,808,813	17,945,205
Dilutive shares
Stock options and restricted stock units (in shares)	129,000	171,000	113,000	165,000
Adjusted weighted average number of common shares (in shares)	19,938,042	19,881,295	19,922,047	18,110,127
Diluted earnings per share (in dollars per share)	$ 0.31	$ 0.19	$ 0.96	$ 0.84
Potentially dilutive shares excluded from diluted earnings per share calculation (in shares)	434,000	90,000	452,000	157,000