Note 13 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 95
Effective Income Tax Rate Reconciliation, Percent	(1.70%)	(0.10%)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	34.00%	34.00%
Unrecognized Tax Benefits	$ 0	$ 0
Domestic Tax Authority [Member]
Operating Loss Carryforwards	5,334
State and Local Jurisdiction [Member]
Operating Loss Carryforwards	3,622
Foreign Tax Authority [Member] | Her Majesty's Revenue and Customs (HMRC) [Member]
Operating Loss Carryforwards	$ 906
Effective Income Tax Rate Reconciliation, Percent	20.00%