Note 10 - Net Loss Per Share (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

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

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Numerator
Net income (loss)	$	(873)	$	6,188	$	(4,477)	$	7,113
Denominator
Weighted average shares of common stock outstanding used in computing net income (loss) per share, basic		13,851		13,973		13,717		13,917
Dilutive effect of incremental shares and share equivalents		—		794		—		816
Weighted average shares of common stock outstanding used in computing net income (loss) per share, diluted		13,851		14,767		13,717		14,733
Net income (loss) per share:
Net income (loss) per share, basic	$	(0.06)	$	0.44	$	(0.33)	$	0.51
Net income (loss) per share, diluted	$	(0.06)	$	0.42	$	(0.33)	$	0.48

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

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Options to purchase common stock		607		42		707		31
Restricted stock units		411		—		419		6
Performance stock units		24		—		19		—
Employee stock purchase plan shares		47		—		82		—
Total		1,089		42		1,227		37