Quarterly Results of Operations (Unaudited) - Summary of Quarterly results of Operations (Detail) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Statement of Operations Data:
Sales, net	$ 9,367,559	$ 10,865,914	$ 9,180,584	$ 7,396,896	$ 7,284,729	$ 7,490,642	$ 5,524,630	$ 5,483,225	$ 36,810,953	$ 25,783,226
Cost of goods sold	(7,153,814)	(7,667,075)	(6,998,695)	(5,559,498)	(5,819,762)	(5,734,144)	(4,285,128)	(3,365,608)	(27,379,082)	(19,204,642)
Gross profit	2,213,745	3,198,839	2,181,889	1,837,398	1,464,967	1,756,498	1,239,502	2,117,617	9,431,871	6,578,584
Operating expenses:
General and administrative	4,398,830	4,254,124	4,162,912	3,643,396	3,177,447	2,218,820	1,832,443	1,599,569	16,459,262	8,828,279
Research and product development	171,984	242,604	374,853	240,686	144,180	102,879	117,797	143,314	1,030,127	508,170
Sales and marketing	4,661,135	4,014,753	3,921,289	3,297,721	2,650,359	2,816,630	2,311,501	2,392,816	15,894,898	10,171,306
Total expenses	9,231,949	8,511,481	8,459,054	7,181,803	5,971,986	5,138,329	4,261,741	4,135,699	33,384,287	19,507,755
Operating loss	(7,018,204)	(5,312,642)	(6,277,165)	(5,344,405)	(4,507,019)	(3,381,831)	(3,022,239)	(2,018,082)	(23,952,416)	(12,929,171)
Other (expense) income	63,458	10,721	11,624	13,901	13,423	26,746	15,847	22,854	99,704	78,870
Loss before income taxes	(6,954,746)	(5,301,921)	(6,265,541)	(5,330,504)					(23,852,712)	(12,850,301)
Income tax benefit (expense)	68,661	(49,777)	(36,718)	0					(17,834)	0
Net loss	$ (6,886,085)	$ (5,351,698)	$ (6,302,259)	$ (5,330,504)	(4,493,596)	(3,355,085)	(3,006,392)	(1,995,228)	(23,870,546)	(12,850,301)
Less deemed dividend of beneficial conversion feature					0	0	(825,366)	0	0	(825,366)
Less deemed dividend on warrant discount					0	(645,939)	(179,427)	0	$ 0	(825,366)
Net loss attributable to Laird Superfood, Inc. common stockholders					$ (4,493,596)	$ (4,001,024)	$ (4,011,185)	$ (1,995,228)		$ (14,501,033)
Net loss per share, basic and diluted	$ (0.76)	$ (0.59)	$ (0.70)	$ (0.60)	$ (0.51)	$ (0.86)	$ (0.93)	$ (0.47)	$ (2.66)	$ (2.61)
Weighted-average shares of common stock outstanding used in computing net loss per share of common stock, basic and diluted	9,067,235	9,001,912	8,967,797	8,894,495	8,876,431	4,672,041	4,325,265	4,281,346	8,983,294	5,546,078