Note 3 - Contracts With Customers 1 (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Long-term Contract with Customer [Member]
Revenue, Remaining Performance Obligation, Amount	$ 1,097,000
Solutions within the VOC Platform [Member]
Revenue from Contract with Customer, Percent of Total Revenue	62.70%	49.60%	33.90%