STOCKHOLDERS' EQUITY Share-Based Compensation (Notes)

3 Months Ended

Mar. 31, 2019

STOCKHOLDERS’ EQUITY

Stock-Based Compensation

Information with respect to option shares granted under all of our stock incentive plans for the three months ended March 31, 2019 was as follows:



	Time-Based Shares		Performance-Based Shares	Total Shares		Weighted- Average Exercise Price	Weighted- Average Remaining Contractual Term (years)	Aggregate Intrinsic Value (in thousands)
Options outstanding at January 1, 2019	891,892		—	891,892		$8.46
Granted	—		—	—		$—
Exercised	(41,250	)	—	(41,250	)	$7.34
Forfeited or canceled	(78,804	)	—	(78,804	)	$10.82
Options outstanding at March 31, 2019	771,838		—	771,838		$8.28	1.52	$18
Options vested at March 31, 2019 or expected to vest				771,838		$8.28	1.52	$18
Options exercisable at March 31, 2019				771,838		$8.28	1.52	$18

Information with respect to our non-vested restricted stock units for the three months ended March 31, 2019 was as follows:



	Non-Vested Restricted Stock Units
	Time-Based Shares		Performance-Based Shares		Total Shares		Weighted- Average Grant-Date Fair Value	Weighted- Average Remaining Contractual Term (years)	Aggregate Intrinsic Value (in thousands)
Non-vested at January 1, 2019	1,978,676		966,143		2,944,819		$4.91
Granted	434,147		411,043		845,190		$6.54
Vested	(221,555	)	(467,923	)	(689,478	)	$4.99
Forfeited	(79,639	)	(139,414	)	(219,053	)	$4.67
Non-vested at March 31, 2019	2,111,629		769,849		2,881,478		$5.39	1.25	$21,438
Expected to vest					2,682,950		$5.52	1.25	$19,961

Stock-based compensation was included in the following captions in our condensed consolidated statements of operations for the three months ended March 31, 2019 and 2018 (in thousands):



	Three Months Ended March 31,
	2019		2018
Cost of products revenues	$	51	$	19
Cost of services revenues	18		34
Research and development expenses	195		152
Marketing and selling expenses	294		360
General and administrative expenses	1,180		138
	$	1,738	$	703