Note 12 - Taxes on Income - Effective Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income taxes (benefit) at U.S. federal statutory tax rate	$ (2,706)	$ 621	$ (21,552)
State income taxes, net of federal income tax benefit	2,603	(798)	2,270
Divestitures	5,613	2,133	0
Meals and entertainment	470	517	785
Changes in taxes previously accrued	(1,070)	(536)	(1,339)
Foreign tax rate differences	(643)	1,301	913
Share-based compensation	358	(1,427)	131
Goodwill impairment	0	291	6,359
Recognition of uncertain tax positions	(717)	(218)	(62)
Deemed mandatory repatriation	0	(842)	10,406
Release of deferred tax liability on foreign earnings	0	0	(7,051)
Domestic Production Activities deduction	0	0	(1,921)
Other matters	(1,110)	(820)	(1,287)
Total tax provision	$ 6,564	$ (132)	$ 5,005
Effective tax rate	(50.90%)	(4.50%)	(8.10%)
Foreign Tax Authority [Member]
Change in the balance of the valuation allowance for deferred tax assets allocated to foreign income tax expense	$ 806	$ 590	$ 4,598
Domestic Tax Authority [Member]
Change in the balance of the valuation allowance for deferred tax assets allocated to foreign income tax expense	$ 2,960	$ (944)	$ 12,755