Note 3 - Summary of Accounting Policies (Details Textual)		12 Months Ended
	Apr. 20, 2018	Dec. 31, 2019 USD ($) $ / shares	Dec. 31, 2018 USD ($) $ / shares	Jan. 01, 2019 USD ($)
Common Stock, Par or Stated Value Per Share | $ / shares		$ 0.18	$ 0.18
Operating Lease, Liability, Total				$ 101,000
Property, Plant and Equipment, Gross, Ending Balance		$ 185,000	$ 216,000
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Ending Balance		151,000	162,000
Depreciation, Total		22,000	14,000
Impairment of Long-Lived Assets Held-for-use		0	0
Impairment of Intangible Assets (Excluding Goodwill), Total		0	0
Intangible Assets, Net (Excluding Goodwill), Total		174,000	192,000
Finite-Lived Intangible Assets, Accumulated Amortization		105,000	93,000
Amortization of Intangible Assets, Total		$ 31,000	30,000
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate		0.00%
Operating Lease, Right-of-Use Asset		$ 50,479		$ 101,000
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