Note 2 - Revenues - Disaggregation of Revenues (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Total revenues, net		$ 13,448	$ 15,402
Subscription and Circulation [Member]
Total revenues, net		10,426	15,014
Strategic Agreements [Member]
Total revenues, net		3,022	388
UNITED STATES
Total revenues, net		10,041	10,211
UNITED KINGDOM
Total revenues, net		1,545	2,110
Other [Member]
Total revenues, net	[1]	$ 1,862	$ 3,081

[1] No individual country within the "Other" category accounted for 10% or more of revenues, net for any period presented.