Note 4 - Redeemable Noncontrolling Interest - Redeemable Noncontrolling Interest (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019		Dec. 31, 2018	Dec. 31, 2017
Redemption value adjustment	$ 1,253		$ (17,970)	$ 909
Redeemable Noncontrolling Interest [Member]
Balance at beginning of period	61,004		43,929	33,138
Noncontrolling interest	3,165	[1]	0	1,540	[2]
Net income	75		2,214	1,631
Foreign currency translation	(1,764)		(3,109)	8,529
Redemption value adjustment	(1,253)		17,970	(909)
Balance at end of period	$ 61,227		$ 61,004	$ 43,929

[1] Represents the noncontrolling interest of Captiva Energy calculated at the date of acquisition, February 1, 2019.

[2] Represents the additional noncontrolling interest of Pramac resulting from a common control transaction between Generac Mobile Products S.r.l. and Pramac UK Limited legal entities.