CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Jul. 31, 2011	Apr. 30, 2011
CURRENT ASSETS:
Cash	$ 7,175,773	$ 8,475,525
Accounts receivable (net of allowance for doubtful accounts of $73,886 at July 31, 2011 and $146,502 at April 30, 2011)	2,369,924	2,127,865
Inventories - (net of obsolete of $1,244,216 at January 31, 2011 and April 30, 2010)
Raw materials	5,326,329	5,202,476
Work in process	1,168,638	1,088,235
Finished goods	709,137	723,972
Total inventory	7,204,104	7,014,683
Prepaid expenses and other current assets	1,237,924	964,117
Total current assets	17,987,725	18,582,190
PROPERTY, PLANT AND EQUIPMENT:
Land and building	3,142,486	3,142,486
Aircraft	5,951,859	5,951,859
Machinery and equipment	3,507,843	3,497,763
Office furniture and fixtures	1,031,132	1,024,612
Leasehold improvements	31,389	31,389
Property, plant and equipment, gross	13,664,709	13,648,109
Accumulated depreciation	(5,202,830)	(4,769,307)
Property, plant and equipment, net	8,461,879	8,878,802
SUPPLEMENTAL TYPE CERTIFICATES: (net of amortization of $2,473,753 at July 31, 2011 and $2,464,183 at April 30, 2011)	1,686,632	1,696,202
OTHER ASSETS:
Deferred tax asset	1,226,000	1,226,000
Other assets (net of accumulated amortization of $321,914 at July 31, 2011 and $292,465 at April 30, 2011)	1,745,052	1,774,500
Total other assets	2,971,052	3,000,500
Total Assets	31,107,288	32,157,694
CURRENT LIABILITIES:
Line of Credit	520,655	91,799
Current maturities of long-term debt and capital lease obligations	1,654,634	1,807,490
Accounts payable	1,527,150	2,093,992
Customer deposits	1,090,825	1,091,043
Gaming facility mandated payment	1,631,464	2,028,015
Compensation and compensated absences	1,024,627	1,605,283
Accrued income tax	157,878	252,623
Other	214,782	221,584
Total current liabilities	7,822,015	9,191,829
LONG-TERM DEBT, AND CAPITAL LEASE NET OF CURRENT MATURITIES:	4,623,264	4,940,402
Total liabilities	12,445,279	14,132,231
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY:
Common stock, par value $.01:Authorized 100,000,000 shares issued and outstanding 57,194,262 shares at July 31, 2011 and April 30, 2011	571,943	571,943
Common stock, owed but not issued 278,573 shares at July 31, 2011 and at April 30, 2011	2,786	2,786
Capital contributed in excess of par	12,042,325	11,911,838
Treasury stock at cost, 600,000 shares	(732,000)	(732,000)
Minority Interest	397,310	(396)
Retained earnings	6,379,645	6,271,292
Total stockholders' equity	18,662,009	18,025,463
Total liabilities and stockholders' equity	31,107,288	32,157,694
Class A [Member]
STOCKHOLDERS' EQUITY:
Preferred stock	0	0
Class B [Member]
STOCKHOLDERS' EQUITY:
Preferred stock	$ 0	$ 0