Note 3 - Net Loss Per Share (Tables)

3 Months Ended

Mar. 31, 2018

Notes Tables

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

				Weighted-Average
				Shares
	Net Loss			Outstanding		Per Share
	(Numerator)			(Denominator)		Amount
Three months ended March 31, 2018
Basic and diluted	$	(13,424	)		72,517	$	(0.19	)
Three months ended March 31, 2017
Basic and diluted	$	(16,360	)		70,196	$	(0.23	)

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

	Three Months Ended March 31,
	2018		2017
Stock options		3,483		1,150
Contingent consideration liability		2,359		1,706
Total securities excluded		5,842		2,856