RESTRICTED STOCK UNITS, STOCK OPTIONS AND WARRANTS (Tables)

6 Months Ended

Jun. 30, 2018

STOCK OPTIONS AND WARRANTS [Abstract]

Summary of Option Activity [Table Text Block]

The following table sets forth a summary of stock option activity under the Stock Plans for the six months ended June 30, 2018 (shares in thousands):

	Shares			Price (1)		Term (2)
Outstanding, December 31, 2017		12,130		$	2.95		4.9
Granted		1,297			8.46
Forfeited		(29	)		7.32
Expired		(1	)		1.02
Exercised		(691	)		1.06
Outstanding, June 30, 2018 (3)(4)		12,706			3.60		5.0
Vested, June 30, 2018 (3)		10,302			2.58		4.0

(1) Represents the weighted average exercise price.

(2) Represents the weighted average remaining contractual term until the stock options expire.

(3) As of June 30, 2018, the aggregate intrinsic value of all stock options outstanding was $41.7 million. As of June 30, 2018, the aggregate intrinsic value of vested stock options was $41.6 million.

(4) The number of outstanding stock options that are not expected to ultimately vest due to forfeiture amounted to 0.3 million shares as of June 30, 2018.

The following table presents activity affecting the total number of shares available for grant under the Stock Plans for the six months ended June 30, 2018 (in thousands):

Available, December 31, 2017	2,413
Stock options granted	(1,297	)
Restricted stock units granted	(176	)
Expired options under 2007 Plan	1
Forfeited options under Stock Plans	29
Newly authorized by Board of Directors	2,300
Available, June 30, 2018	3,270

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

For the six months ended June 30, 2018, the fair value of each stock option grant under the Stock Plans was estimated on the date of grant using the BSM option-pricing model, with the following weighted-average assumptions:

Expected life (in years)		5.9
Volatility		31	%
Dividend yield		0	%
Risk-free interest rate		2.7	%
Fair value per common share on date of grant	$	8.46

Schedule of Stock-based Compensation Expense [Table Text Block]

Stock-based compensation expense attributable to RSU’s and stock options for the three and six months ended June 30, 2018 and 2017 is classified as follows (in thousands):

	Three Months Ended				Six Months Ended
	June 30:				June 30:
	2018		2017		2018		2017
Cost of revenues	$	201	$	57	$	366	$	121
Sales and marketing		450		163		817		303
General and administrative		447		133		782		290
Total	$	1,098	$	353	$	1,965	$	714