CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total	Total Stockholders’ Equity attributable to Karat Packaging Inc.	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings	Noncontrolling Interest
Balance at the beginning of period (in shares) at Dec. 31, 2020			15,190,000
Balance at the beginning of period at Dec. 31, 2020	$ 39,868	$ 32,404	$ 15	$ (248)	$ 13,981	$ 18,656	$ 7,464
Treasury stock, balance at the beginning of period (in shares) at Dec. 31, 2020				(23,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,050	1,780				1,780	1,270
Balance at the end of period (in shares) at Mar. 31, 2021			15,190,000
Balance at the end of period at Mar. 31, 2021	42,918	34,184	$ 15	$ (248)	13,981	20,436	8,734
Treasury stock, balance at the end of period (in shares) at Mar. 31, 2021				(23,000)
Balance at the beginning of period (in shares) at Dec. 31, 2020			15,190,000
Balance at the beginning of period at Dec. 31, 2020	39,868	32,404	$ 15	$ (248)	13,981	18,656	7,464
Treasury stock, balance at the beginning of period (in shares) at Dec. 31, 2020				(23,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	16,461
Balance at the end of period (in shares) at Sep. 30, 2021			19,737,500
Balance at the end of period at Sep. 30, 2021	125,009	116,233	$ 20	$ (248)	82,656	33,805	8,776
Treasury stock, balance at the end of period (in shares) at Sep. 30, 2021				(23,000)
Balance at the beginning of period (in shares) at Mar. 31, 2021			15,190,000
Balance at the beginning of period at Mar. 31, 2021	42,918	34,184	$ 15	$ (248)	13,981	20,436	8,734
Treasury stock, balance at the beginning of period (in shares) at Mar. 31, 2021				(23,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock in connection with our initial public offering, net of issuance costs of $5,088 (in shares)			4,542,500
Issuance of common stock in connection with our initial public offering, net of issuance costs of $5,088	67,592	67,592	$ 5		67,587
Stock-based compensation	240	240			240
Net income	9,338	9,583				9,583	(245)
Balance at the end of period (in shares) at Jun. 30, 2021			19,732,500
Balance at the end of period at Jun. 30, 2021	120,088	111,599	$ 20	$ (248)	81,808	30,019	8,489
Treasury stock, balance at the end of period (in shares) at Jun. 30, 2021				(23,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	848	848			848
Stock Issued During Period, Shares, Restricted Stock Award, Gross (in shares)			5,000
Net income	4,073	3,786				3,786	287
Balance at the end of period (in shares) at Sep. 30, 2021			19,737,500
Balance at the end of period at Sep. 30, 2021	$ 125,009	116,233	$ 20	$ (248)	82,656	33,805	8,776
Treasury stock, balance at the end of period (in shares) at Sep. 30, 2021				(23,000)
Balance at the beginning of period (in shares) at Dec. 31, 2021	19,804,417		19,827,417
Balance at the beginning of period at Dec. 31, 2021	$ 132,025	122,900	$ 20	$ (248)	83,694	39,434	9,125
Treasury stock, balance at the beginning of period (in shares) at Dec. 31, 2021	(23,000)			(23,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 611	611			611
Exercise of common stock options (in shares)	5,000
Exercise of common stock options	$ 51	51			51
Noncontrolling interest tax withholding	(387)						(387)
Net income	7,943	6,667				6,667	1,276
Balance at the end of period (in shares) at Mar. 31, 2022			19,832,417
Balance at the end of period at Mar. 31, 2022	$ 140,243	130,229	$ 20	$ (248)	84,356	46,101	10,014
Treasury stock, balance at the end of period (in shares) at Mar. 31, 2022				(23,000)
Balance at the beginning of period (in shares) at Dec. 31, 2021	19,804,417		19,827,417
Balance at the beginning of period at Dec. 31, 2021	$ 132,025	122,900	$ 20	$ (248)	83,694	39,434	9,125
Treasury stock, balance at the beginning of period (in shares) at Dec. 31, 2021	(23,000)			(23,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of common stock options (in shares)	5,000
Net income	$ 21,296
Balance at the end of period (in shares) at Sep. 30, 2022	19,809,417		19,832,417
Balance at the end of period at Sep. 30, 2022	$ 154,082	143,832	$ 20	$ (248)	85,519	58,541	10,250
Treasury stock, balance at the end of period (in shares) at Sep. 30, 2022	(23,000)			(23,000)
Balance at the beginning of period (in shares) at Mar. 31, 2022			19,832,417
Balance at the beginning of period at Mar. 31, 2022	$ 140,243	130,229	$ 20	$ (248)	84,356	46,101	10,014
Treasury stock, balance at the beginning of period (in shares) at Mar. 31, 2022				(23,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	565	565			565
Noncontrolling interest tax withholding	(487)						(487)
Net income	7,200	6,344				6,344	856
Balance at the end of period (in shares) at Jun. 30, 2022			19,832,417
Balance at the end of period at Jun. 30, 2022	147,521	137,138	$ 20	$ (248)	84,921	52,445	10,383
Treasury stock, balance at the end of period (in shares) at Jun. 30, 2022				(23,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	598	598			598
Noncontrolling interest tax withholding	(190)						(190)
Net income	$ 6,153	6,096				6,096	57
Balance at the end of period (in shares) at Sep. 30, 2022	19,809,417		19,832,417
Balance at the end of period at Sep. 30, 2022	$ 154,082	$ 143,832	$ 20	$ (248)	$ 85,519	$ 58,541	$ 10,250
Treasury stock, balance at the end of period (in shares) at Sep. 30, 2022	(23,000)			(23,000)