STOCKHOLDERS' EQUITY (Notes)

3 Months Ended

Mar. 31, 2021

Share-based Payment Arrangement [Abstract]

STOCKHOLDERS’ EQUITY

Stock-Based Compensation

Information with respect to the Company’s option shares granted under all of our stock incentive plans for the three months ended March 31, 2021 was as follows:


	Total Number of Options	Weighted- Average Exercise Price	Weighted- Average Remaining Contractual Term (years)	Aggregate Intrinsic Value (in thousands)
Options outstanding at January 1, 2021	246,000	$7.48
Granted	—	$—
Exercised	(235,000)	$7.47
Forfeited or canceled	—	$—
Options outstanding at March 31, 2021	11,000	$7.70	0.38	$148

Information with respect to the Company’s non-vested restricted stock units for the three months ended March 31, 2021 was as follows:



	Number of Restricted Stock Units	Weighted- Average Grant-Date Fair Value	Weighted- Average Remaining Contractual Term (years)	Aggregate Intrinsic Value (in thousands)	Shares Retained to Cover Statutory Minimum Withholding Taxes
Non-vested at January 1, 2021	2,114,879	$7.01			—
Granted	201,259	21.80			—
Vested	(327,110)	6.17			(130,552)
Forfeited	(19,692)	7.37			—
Outstanding at March 31, 2021	1,969,336	$8.65	0.79	$41,553

Information with respect to the Company’s non-vested performance-based restricted stock units for the three months ended March 31, 2021 was as follows:



	Number of Performance-based Restricted Stock Units	Weighted- Average Grant-Date Fair Value	Weighted- Average Remaining Contractual Term (years)	Aggregate Intrinsic Value (in thousands)	Shares Retained to Cover Statutory Minimum Withholding Taxes
Non-vested at January 1, 2021	653,428	$6.74			—
Granted	397,048	15.07			—
Vested	(471,112)	5.81			(196,703)
Forfeited	—	—			—
Non-vested at March 31, 2021	579,364	$13.20	1.55	$12,225

Stock-based compensation was included in the following captions in the Company’s condensed consolidated statements of operations for the three months ended March 31, 2021 and 2020 (in thousands):


	Three Months Ended March 31,
	2021		2020
Share-based compensation expense by type:

Time-based Restricted Stock Units	$	2,437	$	1,567
Performance-based Restricted Stock Units	$	656	$	516
ESPP	$	29	$	26
Total share-based compensation expense	$	3,122	$	2,109


	Three Months Ended March 31,
	2021		2020
Cost of products revenues	$	142	$	102
Cost of services revenues	298		98
Research and development expenses	521		294
Marketing and selling expenses	602		441
General and administrative expenses	1,559		1,174
Total share-based compensation expense	$	3,122	$	2,109