Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Income Statement [Abstract]
Revenue, net	$ 17,160,494	$ 14,144,569	$ 47,743,077	$ 44,325,000
Cost of sales	14,414,611	12,124,514	39,831,025	37,579,651
Selling, general and administrative expenses	3,084,495	3,270,723	8,414,414	8,845,716
Cost and expenses, total	17,499,106	15,395,237	48,245,439	46,425,367
Loss from operations	(338,612)	(1,250,668)	(502,362)	(2,100,367)
Other income (loss):
Interest expense, net	(51,297)	(41,301)	(155,270)	(33,394)
Unrealized gain (loss) on marketable securities, net	9,944	(2,024)	(1,720)	9,184
Loss before income taxes	(379,965)	(1,293,993)	(659,352)	(2,124,577)
Benefit from income taxes	(79,000)	(352,000)	(114,000)	(591,000)
Consolidated net loss	(300,965)	(941,993)	(545,352)	(1,533,577)
Less: Net income attributable to noncontrolling interest	3,964	3,109	9,335	13,027
Net loss attributable to TSR, Inc.	$ (304,929)	$ (945,102)	$ (554,687)	$ (1,546,604)
Basic net loss per TSR, Inc. common share (in Dollars per share)	$ (0.16)	$ (0.48)	$ (0.28)	$ (0.79)
Diluted net loss per TSR, Inc. common share (in Dollars per share)	$ (0.16)	$ (0.48)	$ (0.28)	$ (0.79)
Basic weighted average number of common shares outstanding (in Shares)	1,962,062	1,962,062	1,962,062	1,962,062
Diluted weighted average number of common shares outstanding (in Shares)	1,962,062	1,962,062	1,962,062	1,962,062