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Sale of Theatre Rigging Manufacturing (Notes)
 12 Months Ended
Apr. 30, 2016
Discontinued Operations and Disposal Groups [Abstract]  
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]
Note 5. Sale of Theatre Rigging Division

In July 2014, we sold our automated rigging systems business for theatre applications. Related to the sale, we recorded a $1,261 gain, which is included in cost of goods sold in the High School Park and Recreation business unit.

As part of the transaction, we sold assets of $2,817 that primarily consisted of accounts receivable, patents, inventory, and manufacturing equipment, net of $355 of accounts payable.