STOCKHOLDERS' EQUITY (Tables)

6 Months Ended

Jun. 30, 2020

Share-based Payment Arrangement [Abstract]

Share-based Payment Arrangement, Option, Activity

Information with respect to option shares granted under all of our stock incentive plans for the six months ended June 30, 2020 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, 2020	565,000	—	565,000	$7.57
Granted	—	—	—	$—
Exercised	(100,000)	—	—	$7.66
Forfeited or canceled	—	—	—	$—
Options outstanding at June 30, 2020	465,000	—	565,000	$7.56	0.92	$—
Options vested at June 30, 2020 or expected to vest			465,000	$7.56	0.92	$—
Options exercisable at June 30, 2020			465,000	$7.56	0.92	$—

Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity

Information with respect to our non-vested restricted stock units for the six months ended June 30, 2020 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, 2020	2,087,933	554,265	2,642,198	$6.40
Granted	1,116,656	578,316	1,694,972	$6.70
Vested	(785,229)	(328,673)	(1,113,902)	$6.27
Forfeited	(46,024)	—	(46,024)	$7.53
Non-vested at June 30, 2020	2,373,336	803,908	3,177,244	$6.59	1.15	$23,066,774
Expected to vest			3,177,244	$6.59	1.15	$23,066,774

Share-based Payment Arrangement, Expensed and Capitalized, Amount

Stock-based compensation was included in the following captions in our condensed consolidated statements of operations for the six months ended June 30, 2020 and 2019 (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
Cost of products revenues	$	118	$	90	$	220	$	141
Cost of services revenues	158		77		256		95
Research and development expenses	359		262		653		457
Marketing and selling expenses	581		450		1,022		744
General and administrative expenses	1,510		1,126		2,684		2,306
	$	2,726	$	2,005	$	4,835	$	3,743