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Note 10 - Income Taxes (Details) - Provision for Income Taxes Differs From the Amount Computed By Applying the Statutory Federal Income Tax Rate (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Provision for Income Taxes Differs From the Amount Computed By Applying the Statutory Federal Income Tax Rate [Abstract]
Income for the year before provision for income taxes	$ 5,799,803	$ 6,428,298	$ 3,450,610
Computed expected tax expense	1,971,933	2,185,621	1,173,207
State income taxes	14,500	16,071	8,627
Permanent differences, including foreign exchange	13,700	21,728	13,700
Investment tax credits recovered	(115,455)	(106,941)	(41,833)
Other, including alternative minimum tax and adjustments to opening deferred tax assets	(265,339)	(112,323)	(218,252)
Change in beginning of the year balance of the valuation allowance allocated to income tax expense			(3,655,070)
Provision for (recovery of) income taxes	$ 1,619,339	$ 2,004,156	$ (2,719,621)

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Investment tax credits recovered

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Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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