Note 2 - Contracts With Customers 1 (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Long-term Contract with Customer [Member]
Revenue, Remaining Performance Obligation, Amount	$ 281,000		$ 281,000
VoC Platform [Member]
Revenue from Contract with Customer, Percent of Total Revenue	72.90%	62.10%	70.90%	60.00%