Note 2 - Contracts With Customers 1 (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Long-term Contract with Customer [Member]
Revenue, Remaining Performance Obligation, Amount	$ 759,000
Solutions within the VOC Platform [Member]
Revenue from Contract with Customer, Percent of Total Revenue	69.10%	57.80%