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Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	May 31, 2017	May 31, 2016
Earnings Per Share [Abstract]
Net income	$ 5	$ 1,678
Weighted average share outstanding:
Basic	8,391,244	8,391,244
Common stock equivalents-treasury stock method	121,130
Diluted	8,512,374	8,391,244
Basic	$ 0.00	$ 0.20
Diluted	$ 0.00	$ 0.20

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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