Note 3 - Contracts With Customers 1 (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue, Remaining Performance Obligation, Amount	$ 513,000		$ 513,000
Solutions within the VOC Platform [Member]
Revenue from Contract with Customer, Percent of Total Revenue	62.10%	50.40%	60.00%	47.40%