Note 7 - Goodwill and Other Intangible Assets, Net Schedule of Acquired Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 113,771	$ 113,776
Finite-Lived Intangible Assets, Accumulated Amortization	(32,713)	(19,529)
Finite-Lived Intangible Assets, Net	$ 81,058	94,247
Business Acquisition, Goodwill and Other Intangible Assets, Expected Number of Years For Tax Deduction	15 years
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 83,316	83,471
Finite-Lived Intangible Assets, Accumulated Amortization	(19,696)	(11,038)
Finite-Lived Intangible Assets, Net	$ 63,620	72,433
Customer relationships | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 years
Customer relationships | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	15 years
Technology-based intangible assets
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 15,250	15,100
Finite-Lived Intangible Assets, Accumulated Amortization	(5,497)	(2,949)
Finite-Lived Intangible Assets, Net	$ 9,753	12,151
Technology-based intangible assets | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 years
Technology-based intangible assets | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	8 years
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 8,340	8,340
Finite-Lived Intangible Assets, Accumulated Amortization	(2,125)	(1,243)
Finite-Lived Intangible Assets, Net	$ 6,215	7,097
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	10 years
Client backlog
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 6,680	6,680
Finite-Lived Intangible Assets, Accumulated Amortization	(5,235)	(4,184)
Finite-Lived Intangible Assets, Net	$ 1,445	2,496
Client backlog | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 years
Client backlog | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years
Noncompete agreements
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 185	185
Finite-Lived Intangible Assets, Accumulated Amortization	(160)	(115)
Finite-Lived Intangible Assets, Net	$ 25	$ 70
Noncompete agreements | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	2 years
Noncompete agreements | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 years