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Inventories (Details) (USD $)	Oct. 31, 2013	Apr. 30, 2013
Inventory, Net	$ 1,792,000	$ 1,391,000
Raw Materials, Net of Reserves [Member]
Inventory, Raw Materials, Net of Reserves	1,101,000	850,000
Work in Process [Member]
Inventory, Work in Process, Net of Reserves	329,000	281,000
Finished Goods, Net of Reserves [Member]
Inventory, Finished Goods, Net of Reserves	$ 362,000	$ 260,000

Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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