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Sale of Theatre Rigging Manufacturing (Details) - Theatre Rigging Manufacturing [Member] - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2016	Jul. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain from sale of division	$ 1,261
Assets sold		$ 2,817
Accounts payable sold		$ 355

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Amount classified as assets attributable to disposal group held for sale or disposed of.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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