Note 1 - Summary of Significant Accounting Policies (Details Textual)	3 Months Ended
	Mar. 31, 2020 USD ($)
Income Tax Credits Alternative Minimum Tax, Accelerated Due to CARES Act	$ 2,155
Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	50 years
ACS Cable Systems LLC and Quintillion Holdings, LLC Joint Venture [Member]
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage	50.00%