Deferred Revenues and Deferred Cost of Revenues	9 Months Ended
Deferred Revenues and Deferred Cost of Revenues	Jan. 31, 2012
Deferred Revenues and Deferred Cost of Revenues [Abstract]
Deferred Revenues and Deferred Cost of Revenues	Deferred Revenues and Deferred Cost of Revenues Deferred revenues of approximately $1.3 million as of January 31, 2012 represent prepayments for products and services which were related to the use of the OpenElect® and PBC voting systems, lottery terminals and other software and technical support services. The Company will recognize the revenues and related cost of revenues upon its fulfillment of the prescribed criteria for revenue recognition. Deferred cost of revenue was immaterial for the current quarter. Certain amounts included in the costs and estimated earnings in excess of billings on uncompleted contracts and billings in excess of costs and estimated earnings on uncompleted contracts as of April 30, 2011 have been reclassified to deferred cost of revenue and deferred revenue to conform to the current period's presentation.

The entire disclosure for deferred revenues at the end of the reporting period, and description and amounts of significant changes that occurred during the reporting period. Deferred revenue is a liability as of the balance sheet date related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

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