Summary of Significant Accounting Policies (Details) - Schedule of Earnings Per Share, Basic and Diluted - USD ($) $ / shares in Units, shares in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2018
Schedule of Earnings Per Share, Basic and Diluted [Abstract]
Net loss	$ (11,309,000)	$ 32,431,000	$ (23,268,000)	$ (11,998,000)	$ (20,181,000)	$ 16,414,000	$ (22,485,000)	$ (29,127,000)	$ (14,144,000)		$ (55,379,000)		$ (42,425,000)
Net income (loss) attributable to non-controlling interests									130,000		169,000		(57,000)
Net loss attributable to JAKKS Pacific, Inc.	(11,342,000)	32,382,000	(23,276,000)	(12,038,000)	(20,293,000)	16,445,000	(22,542,000)	(29,158,000)	(14,274,000)	[1]	(55,548,000)	[1]	(42,368,000)	[1]
Preferred stock dividend									(1,257,000)		(483,000)		0
Net loss attributable to common stockholders	$ (11,664,000)	$ 32,066,000	$ (23,588,000)	$ (12,345,000)	$ (20,596)	$ 16,265,000	$ (22,542,000)	$ (29,158,000)	$ (15,531,000)		$ (56,031,000)		$ (42,368,000)
Weighted average common shares outstanding - basic and diluted (in Shares)									3,634		2,598		2,310
Loss per share available to common stockholders - basic and diluted (in Dollars per share)									$ (4.27)		$ (21.57)		$ (18.34)

[1] After giving effect to a 1 for 10 reverse stock split effective July 9, 2020.