Condensed Consolidated Statements of Income (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2016	Nov. 30, 2015
Statements of Operations [Abstract]
Revenue, net	$ 15,042,789	$ 15,185,006	$ 30,285,172	$ 30,419,794
Cost of sales	12,452,751	12,679,391	25,093,651	25,394,583
Selling, general and administrative expenses	2,344,682	2,241,693	4,660,422	4,473,315
Operating expenses	14,797,433	14,921,084	29,754,073	29,867,898
Income from operations	245,356	263,922	531,099	551,896
Other income (loss):
Interest and dividend income	2,682	1,920	5,418	3,749
Unrealized gain (loss) on marketable securities, net	(952)	4,984	2,488	248
Income before income taxes	247,086	270,826	539,005	555,893
Provision for income taxes	110,000	137,000	246,000	277,000
Consolidated net income	137,086	133,826	293,005	278,893
Less: Net income attributable to noncontrolling interest	10,769	13,761	18,911	25,080
Net income attributable to TSR, Inc.	$ 126,317	$ 120,065	$ 274,094	$ 253,813
Net income per TSR, Inc. common share	$ 0.06	$ 0.06	$ 0.14	$ 0.13
Weighted average number common shares outstanding	1,962,062	1,962,062	1,962,062	1,962,062