Consolidated Statements of Operations - USD ($)	12 Months Ended
	May 31, 2019	May 31, 2018
Income Statement [Abstract]
Revenue, net	$ 63,340,028	$ 64,989,995
Cost of sales	53,514,636	54,609,095
Selling, general and administrative expenses	11,672,946	9,471,523
Cost and expenses, total	65,187,582	64,080,618
Income (loss) from operations	(1,847,554)	909,377
Other income (loss):
Interest and dividend income	22,309	12,381
Loss on sale of fixed asset	(2,882)
Unrealized gain (loss) from marketable securities, net	(8,928)	15,272
Operating Income, Total	10,499	27,653
Income (loss) before income taxes	(1,837,055)	937,030
Provision (benefit) for income taxes	(538,000)	381,000
Consolidated net income (loss)	(1,299,055)	556,030
Less: Net income attributable to noncontrolling interest	36,940	69,822
Net income (loss) attributable to TSR, Inc.	$ (1,335,995)	$ 486,208
Basic and diluted net income (loss) per TSR, Inc. common share	$ (0.68)	$ 0.25
Basic and diluted weighted average number of common shares outstanding	1,962,062	1,962,062