Condensed Consolidated Statements Of Income (USD $)	3 Months Ended		6 Months Ended
	Nov. 30, 2011	Nov. 30, 2010	Nov. 30, 2011	Nov. 30, 2010
Condensed Consolidated Statements Of Income [Abstract]
Revenue, net.	$ 11,115,015	$ 9,756,983	$ 22,488,110	$ 19,120,876
Cost of sales.	9,224,544	7,853,945	18,687,175	15,510,435
Selling, general and administrative expenses	1,814,621	1,611,636	3,616,900	3,248,141
Cost and expenses	11,039,165	9,465,581	22,304,075	18,758,576
Income from operations	75,850	291,402	184,035	362,300
Other income (expense):
Interest and dividend income	3,150	5,459	6,912	11,239
Unrealized gain (loss) on marketable securities, net	3,824	2,794	1,920	(210)
Income before income taxes.	82,824	299,655	192,867	373,329
Provision for income taxes.	44,000	124,000	91,000	157,000
Consolidated net income	38,824	175,655	101,867	216,329
Less: Net income attributable to noncontrolling interest	(7,121)	(25,244)	(22,978)	(44,356)
Net income attributable to TSR, Inc	$ 31,703	$ 150,411	$ 78,889	$ 171,973
Net income per TSR, Inc. common share	$ 0.02	$ 0.07	$ 0.04	$ 0.09
Weighted average number of common shares outstanding.	2,003,981	2,019,094	2,011,533	2,020,117