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Inventories (Details) (USD $)	Jan. 31, 2015	Apr. 30, 2014
Inventory, Net	$ 1,881,000us-gaap_InventoryNet	$ 1,455,000us-gaap_InventoryNet
Raw Materials, Net of Reserves [Member]
Inventory, Raw Materials, Net of Reserves	981,000	955,000
Work in Process [Member]
Inventory, Work in Process, Net of Reserves	531,000	261,000
Finished Goods, Net of Reserves [Member]
Inventory, Finished Goods, Net of Reserves	369,000	239,000
Inventory Type [Domain]
Inventory, Net	$ 1,881,000	$ 1,455,000

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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