Note 10 - Income Taxes (Details) - Deferred Tax Assets and Liabilities (USD $)	Dec. 31, 2013	Dec. 31, 2012
Deferred Tax Assets and Liabilities [Abstract]
Allowance for doubtful accounts	$ 45,148	$ 13,618
Inventory capitalization	36,591	15,792
Depreciation and amortization	(385,907)	(585,231)
Investment tax credits	600,000	600,000
Research & development tax credits	683,495	435,051
Compensation costs	239,876	235,384
Vacation accrual	274,307	250,046
Capital loss carryforward	78,000	268,237
Gross deferred tax asset	2,629,304	1,232,897
Less valuation allowance	(475,000)	(475,000)
Net deferred tax asset	2,154,304	757,897
Net current deferred tax asset	1,443,321	189,153
Net long-term deferred tax asset	$ 710,983	$ 568,744