Note 9 - Share-based Compensation

6 Months Ended

Jun. 30, 2024

Notes to Financial Statements

Share-Based Payment Arrangement [Text Block]

9. Share-based Compensation

Our Fourth Amended and Restated 2006 Stock Option and Incentive Plan allows for granting of incentive stock options, non-qualified stock options, stock appreciation rights, restricted stock units, performance-based restricted stock units, unrestricted stock awards, and deferred stock awards to our officers, employees, directors and consultants. The components of share-based compensation expense included in the consolidated statements of operations are as follows:

	Three months ended				Six months ended
	June 30,				June 30,
	2024		2023		2024		2023
	(in thousands)				(in thousands)
Stock option awards	$	732	$	671	$	1,473	$	1,333
Restricted stock units		573		485		1,134		962
Performance-based restricted stock units		304		156		612		307
Total share-based compensation	$	1,609	$	1,312	$	3,219	$	2,602

Stock-based compensation is included in our consolidated statements of operations as follows:

	Three months ended				Six months ended
	June 30,				June 30,
	2024		2023		2024		2023
	(in thousands)				(in thousands)
Cost of sales	$	228	$	166	$	439	$	336
Sales and marketing		274		250		545		464
General and administrative		943		768		1,908		1,545
Research and development		164		128		327		257
Total stock-based compensation	$	1,609	$	1,312	$	3,219	$	2,602

We did not grant any options during the six months ended June 30, 2024. During the six months ended June 30, 2023, we granted options for the purchase of 1,660 shares of our common stock. During the six months ended June 30, 2024 and 2023, we granted restricted stock units of 222 and 765, respectively. We did not grant any performance-based restricted stock units during the six months ended June 30, 2024. During the six months ended June 30, 2023, we granted performance-based restricted stock units of 310. We issued 147,540 and 179,775 shares of common stock following the exercise or vesting of underlying stock options, restricted stock units and performance-based restricted stock units during the six months ended June 30, 2024 and 2023, respectively.