2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 1) (USD $)	Apr. 30, 2013	Apr. 30, 2012
Summary Of Significant Accounting Policies Details 1
Raw materials	$ 2,169,000	$ 1,966,000
Work-in-process	2,170,000	1,645,000
Total inventories	$ 4,339,000	$ 3,611,000

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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