XML 29 R16.htm IDEA: XBRL DOCUMENT

Note 4 - Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2018

Share-based Compensation, Stock Options, Activity [Table Text Block]

	Three Months Ended March 31, 2018 (unaudited)
	Number			Weighted average exercise price		Aggregate intrinsic value (in thousands)		Weighted average remaining contractual life (years)

Options outstanding as of January 1, 2018		1,456,285		$	16.172	$	47,152		4.906
Granted		-		$	-
Exercised		(203,474	)	$	17.596
Forfeited		(1,234	)	$	22.070

Options outstanding as of March 31, 2018		1,251,577		$	15.935	$	55,777		4.622

Options exercisable at the end of the period		1,122,468		$	15.151	$	50,903		4.367

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

Range of exercise price			Options outstanding as of March 31, 2018		Weighted average remaining contractual life (years)		Weighted average exercise price		Options exercisable as of March 31, 2018		Weighted average remaining contractual life (years)		Weighted average exercise price of options exercisable

$1.039	-	1.576		361,725		1.090	$	1.275		361,725		1.090	$	1.275
$6.230	-	8.800		28,656		3.776	$	7.174		28,656		3.776	$	7.174
$12.470	-	16.870		204,001		5.534	$	13.387		180,041		5.220	$	12.923
$19.510	-	21.660		328,024		6.375	$	21.205		266,979		6.341	$	21.201
$22.010	-	24.230		148,740		6.047	$	22.297		138,475		6.042	$	22.318
	$29.880			92,028		6.899	$	29.880		58,189		6.899	$	29.880
	$39.860			88,403		5.978	$	39.860		88,403		5.978	$	39.860

				1,251,577		4.622	$	15.935		1,122,468		4.367	$	15.151

Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]

	Options for shares of common stock		Exercise price per share		Options exercisable		Exercisable through
	(number)				(number)

February 2013		1,500	$	12.470		1,500	February 2023
August 2013		4,188	$	21.140		4,188	August 2023
March 2014		7,844	$	39.860		7,844	March 2024
May 2014		5,991	$	22.010		5,690	May 2024
November 2014		7,032	$	21.660		5,428	November 2024
May 2015		1,312	$	19.510		730	May 2025
February 2016		2,250	$	16.870		1,050	February 2026

		30,117				26,430

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

	Number of shares underlying outstanding restricted stock units			Weighted- average grant date fair value
Unvested balance - January 1, 2018		2,018,121		$	27.32
Granted		1,061,150		$	51.95
Vested		(408,615	)	$	24.91
Forfeited		(19,900	)	$	32.66
Unvested balance – March 31, 2018		2,650,756		$	37.51

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

	Three Months Ended March 31,
	2018		2017
	(unaudited)
	(in thousands)

Cost of revenues	$	362	$	227
Research and development		2,105		1,130
Sales and marketing		3,101		2,059
General and administrative		1,359		988

Total	$	6,927	$	4,404

- Definition

Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable.

+ References + Details