Note 3 - Notes Receivable (Details Textual) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018	Sep. 18, 2017
Privately-Held Identity and Professional Services Company With Ties to the FinTech Industry [Member]
Receivable Commitment to Lend				$ 1,500,000
Notes Receivable, Stated Interest Rate	6.00%		6.00%
Notes Receivable, Renewal Term			1 year
Payments to Acquire Notes Receivable	$ 500,000		$ 550,000
Notes Receiavble Term	180 days
Private Limited India Based Company in the FinTech Industry [Member]
Receivable Commitment to Lend		$ 435,000
Notes Receivable, Stated Interest Rate		5.00%
Payments to Acquire Notes Receivable		$ 235,000
Private Limited India Based Company in the FinTech Industry [Member] | Maximum [Member]
Notes Receivable, Conversion, Percentage		10.00%