Note D - Income Taxes (Detail) - Deferred tax assets and liabilities (USD $)	Dec. 31, 2012	Dec. 31, 2011
Current
Accounts receivable	$ 9,933	$ 6,101
Inventories	14,348	15,905
Accrued expenses	192,307	201,540
	216,588	223,546
Non-current
Depreciation	(98,800)	(46,207)
Unrealized gain on marketable securities	(94,940)	(18,361)
	(193,740)	(64,578)
Net deferred tax asset	$ 22,848	$ 158,968

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