Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2017	Feb. 29, 2016
Statements of Operations [Abstract]
Revenue, net	$ 15,390,236	$ 15,074,832	$ 45,675,408	$ 45,494,626
Cost of sales	12,988,277	12,770,009	38,081,928	38,164,592
Selling, general and administrative expenses	2,521,189	2,318,607	7,181,611	6,791,922
Operating expenses	15,509,466	15,088,616	45,263,539	44,956,514
Income (loss) from operations	(119,230)	(13,784)	411,869	538,112
Other income (loss):
Interest and dividend income	2,649	2,250	8,067	5,999
Unrealized gain (loss) on marketable securities, net	1,200	(4,144)	3,688	(3,896)
Income (loss) before income taxes	(115,381)	(15,678)	423,624	540,215
Provision (benefit) for income taxes	(58,000)	(7,000)	188,000	270,000
Consolidated net income (loss)	(57,381)	(8,678)	235,624	270,215
Less: Net income attributable to noncontrolling interest	11,020	14,969	29,931	40,049
Net income (loss) attributable to TSR, Inc.	$ (68,401)	$ (23,647)	$ 205,693	$ 230,166
Net income (loss) per TSR, Inc. common share	$ (0.03)	$ (0.01)	$ 0.10	$ 0.12
Weighted average number common shares outstanding	1,962,062	1,962,062	1,962,062	1,962,062