Note 16 - Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	Carrying value at		Fair value measurements
	December 31, 2018		Level 1		Level 2		Level 3
Contingent consideration liability	$	13,286	$	-	$	-	$	13,286

Schedule of Business Acquisitions by Acquisition, Contingent Consideration [Table Text Block]

Balance, December 31, 2017	$	18,418
Amounts recognized on acquisitions		4,536
Fair value adjustments		(167	)
Resolved and settled in cash		(9,245	)
Other		(256	)
Balance, December 31, 2018	$	13,286
Less: current portion	$	12,005
Non-current portion	$	1,281

Fair Value, by Balance Sheet Grouping [Table Text Block]

	2018				2017
	Carrying amount		Fair value		Carrying amount		Fair value
Other receivables	$	4,212	$	4,212	$	3,515	$	3,515
Long-term debt		334,523		344,198		269,625		282,109