Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Feb. 29, 2020	Feb. 28, 2019	Feb. 29, 2020	Feb. 28, 2019
Income Statement [Abstract]
Revenue, net	$ 14,144,569	$ 14,782,706	$ 44,325,000	$ 47,765,983
Cost of sales	12,124,514	12,651,580	37,579,651	40,280,006
Selling, general and administrative expenses	3,270,723	3,046,720	8,845,716	8,449,495
Total cost and expenses	15,395,237	15,698,300	46,425,367	48,729,501
Loss from operations	(1,250,668)	(915,594)	(2,100,367)	(963,518)
Other income (expense):
Interest income and expense, net	(41,301)	5,096	(33,394)	14,671
Loss on sale of fixed asset		(2,882)		(2,882)
Unrealized gain (loss) on marketable securities, net	(2,024)	2,920	9,184	(1,792)
Loss before income taxes	(1,293,993)	(910,460)	(2,124,577)	(953,521)
Benefit from income taxes	(352,000)	(235,000)	(591,000)	(247,000)
Consolidated net loss	(941,993)	(675,460)	(1,533,577)	(706,521)
Less: Net income attributable to noncontrolling interest	3,109	774	13,027	28,659
Net loss attributable to TSR, Inc.	$ (945,102)	$ (676,234)	$ (1,546,604)	$ (735,180)
Basic and diluted net loss per TSR, Inc. common share	$ (0.48)	$ (0.34)	$ (0.79)	$ (0.37)
Basic and diluted weighted average number of common shares outstanding	1,962,062	1,962,062	1,962,062	1,962,062