Note 4 - Property and Equipment, Net - Property and Equipment (Details) - USD ($)	3 Months Ended
Mar. 31, 2018	Dec. 31, 2017
Cost	$ 4,722,743	$ 4,615,011
Accumulated Depreciation	4,153,589	4,062,473
Net Book Value	569,154	552,538
Computer And Office Equipment [Member]
Cost	2,367,310	2,322,833
Accumulated Depreciation	1,999,795	1,949,982
Net Book Value	$ 367,515	372,851
Estimated Useful Lives (Year)	5 years
Leasehold Improvements [Member]
Cost	$ 133,659	118,380
Accumulated Depreciation	100,846	98,901
Net Book Value	$ 32,813	19,479
Estimated Useful Lives (Year)	5 years
Computer Equipment [Member]
Cost	$ 2,057,898	2,010,999
Accumulated Depreciation	1,922,482	1,886,342
Net Book Value	$ 135,416	124,657
Estimated Useful Lives (Year)	3 years
Furniture and Fixtures [Member]
Cost	$ 163,876	162,799
Accumulated Depreciation	130,466	127,248
Net Book Value	$ 33,410	$ 35,551
Estimated Useful Lives (Year)	5 years

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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