SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND PRACTICES (Tables)

6 Months Ended

Nov. 30, 2015

Estimated Useful Lives of Assets

Depreciation and amortization of assets are computed by the straight-line method over the following estimated useful lives of the assets:

Classification	Useful Life
Buildings		20-40 years
Leasehold improvements		2-15 years
Machinery and equipment		2-12 years
Furniture and fixtures		2-10 years
Computers and computer software		2-5 years
Automobiles		2-5 years

Schedule of Rollforward Goodwill

A rollforward of goodwill for the six months ended November 30, 2015 is as follows (in thousands):

	Six Months Ended November 30, 2015
	(unaudited)
	IHT			MS			Quest Integrity			Total
Balance at beginning of period	$	60,737		$	17,466		$	29,570		$	107,773
Acquisitions		145,440			2,483			—			147,923
Foreign currency adjustments		(1,152	)		(363	)		(504	)		(2,019	)
Balance at end of period	$	205,025		$	19,586		$	29,066		$	253,677

Amounts Used In Basic and Diluted Earnings Per Share

Amounts used in basic and diluted earnings per share, for the three and six months ended November 30, 2015 and 2014, are as follows (in thousands):

	Three Months Ended November 30,				Six Months Ended November 30,
	2015		2014		2015		2014
	(unaudited)		(unaudited)		(unaudited)		(unaudited)
Weighted-average number of basic shares outstanding		21,193		20,645		20,781		20,574
Stock options, stock units and performance awards		228		442		284		497
Conversion of non-controlling interest		—		757		362		757
Total shares and dilutive securities		21,421		21,844		21,427		21,828