Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended
	Aug. 31, 2020	Aug. 31, 2019
Statement of Comprehensive Income [Abstract]
Revenue, net	$ 14,514,006	$ 14,946,562
Cost of sales	12,182,922	12,671,052
Selling, general and administrative expenses	2,271,301	3,189,463
Cost and expenses, total	14,454,223	15,860,515
Income (loss) from operations	59,783	(913,953)
Other income (expense):
Interest income and (expense), net	(52,276)	4,915
Unrealized gain (loss) on marketable securities, net	(9,584)	2,696
Loss before income taxes	(2,077)	(906,342)
Benefit from income taxes	(5,000)	(247,000)
Consolidated net income (loss)	2,923	(659,342)
Less: Net income attributable to noncontrolling interest	5,923	3,672
Net loss attributable to TSR, Inc.	$ (3,000)	$ (663,014)
Basic and diluted net loss per TSR, Inc. common share (in Dollars per share)	$ 0.00	$ (0.34)
Basic and diluted weighted average number of common shares outstanding (in Shares)	1,962,062	1,962,062