Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share Reconciliation [Abstract]
Net income attributable to Karat Packaging Inc.	$ 10,502	$ 6,344	$ 19,507	$ 13,011
Weighted average shares (in shares)	19,886,585	19,809,417	19,887,023	19,808,505
Basic earnings per share (in dollars per share)	$ 0.53	$ 0.32	$ 0.98	$ 0.66
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Net income attributable to Karat Packaging Inc.	$ 10,502	$ 6,344	$ 19,507	$ 13,011
Weighted average shares (in shares)	19,886,585	19,809,417	19,887,023	19,808,505
Weighted Average Number of Shares Outstanding, Diluted, Adjustment [Abstract]
Stock options and restricted stock units (in shares)	67,000	118,000	60,000	105,000
Adjusted weighted average number of common shares (in shares)	19,953,510	19,926,956	19,947,155	19,914,044
Diluted earnings per share (in dollars per share)	$ 0.53	$ 0.32	$ 0.98	$ 0.65
Potentially dilutive shares excluded from diluted earnings per share calculation (in shares)	420,000	447,000	427,000	460,000