Note 3 - Summary of Accounting Policies (Details Textual)		12 Months Ended
	Apr. 20, 2018	Dec. 31, 2018 USD ($) $ / shares	Dec. 31, 2017 USD ($) $ / shares
Common Stock, Par or Stated Value Per Share | $ / shares		$ 0.18	$ 0.18
Restricted Cash and Cash Equivalents, Total		$ 110,000	$ 55,000
Property, Plant and Equipment, Gross, Ending Balance		216,000	171,000
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Ending Balance		162,000	160,000
Depreciation, Total		14,386	25,956
Impairment of Long-Lived Assets Held-for-use		0	0
Impairment of Intangible Assets (Excluding Goodwill), Total		0	461,715
Intangible Assets, Net (Excluding Goodwill), Total		$ 192,000	234,000
Intangible Asset, Measurement Input		0.485
Finite-Lived Intangible Assets, Accumulated Amortization		$ 93,000	158,000
Amortization of Intangible Assets, Total		29,811	103,038
Warrant Liabilities		$ 0	0
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term		10 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate		0.00%
Acueity intangible Assets [Member]
Impairment of Intangible Assets (Excluding Goodwill), Total			461,715
Intangible Assets, Net (Excluding Goodwill), Total			$ 0
Minimum [Member]
Property, Plant and Equipment, Useful Life		3 years
Finite-Lived Intangible Asset, Useful Life		3 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Vesting Term		1 year
Maximum [Member]
Property, Plant and Equipment, Useful Life		5 years
Finite-Lived Intangible Asset, Useful Life		10 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Vesting Term		4 years
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	12