CAPITAL STOCK (Tables)

12 Months Ended

Dec. 31, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Information with respect to options granted under all stock option plans for the year ended December 31, 2017 was as follows:



	Total Shares		Weighted- Average Exercise Price	Weighted- Average Remaining Contractual Term (years)	Aggregate Intrinsic Value (in thousands)
Options outstanding at January 1, 2017	2,847,502		$10.43
Granted	—		$—
Exercised	—		$—
Forfeited or canceled	(557,485	)	$13.59
Options outstanding at December 31, 2017	2,290,017		$9.65	2.31	$—
Options vested at December 31, 2017 or expected to vest	2,290,017		$9.65	2.31	$—
Options exercisable at December 31, 2017	2,282,517		$9.66	2.30	$—

No options were granted during the years ended December 31, 2017 and 2016. The following table sets forth the weighted-average key assumptions and fair value results for stock options granted during the year ended December 31, 2015.



	Year Ended December 31,
	2015
Expected dividend yield	0.00%
Risk-free interest rate	1.07%
Expected volatility	52.0%
Expected life (in years)	4.48
Weighted-average fair value of options granted (per share)	$3.91

Non-vested restricted stock and restricted stock units

Information with respect to non-vested restricted stock units for the year ended December 31, 2017 was as follows:



	Non-Vested Restricted Stock Units
	Total Shares		Weighted- Average Grant-Date Fair Value	Weighted- Average Remaining Contractual Term (years)	Aggregate Intrinsic Value (in thousands)
Non-vested at January 1, 2017	2,155,781		$6.33
Granted	1,799,346		$4.63
Vested	(779,963	)	$7.26
Forfeited	(111,916	)	$6.12
Non-vested at December 31, 2017	3,063,248		$5.10	0.93	$16,480
Expected to vest	1,809,138		$5.49	0.93	$9,733

Employee stock purchase plan

The following table sets forth the weighted-average key assumptions and fair value results for shares issued under the ESPP during the years ended December 31, 2017, 2016 and 2015:



	Year Ended December 31,
	2017	2016	2015
Expected dividend yield	0.00%	0.00%	0.00%
Risk-free interest rate	0.83%	0.40%	0.03%
Expected volatility	62.0%	69.0%	37.0%
Expected life (in years)	0.49	0.49	0.24
Weighted-average fair value of shares issued (per share)	$0.86	$1.20	$2.15

The following table sets forth the quantities and average prices of shares issued under the ESPP for the years ended December 31, 2017, 2016 and 2015:



	Year Ended December 31,
	2017	2016	2015
Shares issued under the ESPP	96,507	129,342	98,300
Average price of shares issued	$4.53	$4.35	$10.17

Allocated share-based compensation expense

Stock-based compensation was included in the following captions in the Company’s consolidated statements of operations for the years ended December 31, 2017, 2016 and 2015, respectively (in thousands):



	Year Ended December 31,
	2017		2016		2015
Cost of products revenues	$	53	$	60	$	199
Cost of services revenues	189		381		624
Research and development expenses	694		376		461
Marketing and selling expenses	1,944		1,958		1,785
General and administrative expenses	5,431		5,141		6,445
Total	$	8,311	$	7,916	$	9,514