Note 16 - Accumulated Other Comprehensive Income (Details Textual) - USD ($) $ in Thousands	Jan. 01, 2018	Dec. 31, 2017
Retained Earnings [Member] | Accounting Standards Update 2016-01 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	$ (1,100)	$ (1,136)	[1]

[1] Represents the impact of change in accounting principles for its respective Accounting Standard Updates ("ASU"). See Footnote 2 of the Notes to Condensed Consolidated Financial Statements for additional disclosure.