Note 9 - Share-based Compensation

9 Months Ended

Sep. 30, 2023

Notes to Financial Statements

Share-Based Payment Arrangement [Text Block]

9. Share-based Compensation

Our Third 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 were as follows:

	Three months ended				Nine months ended
	September 30,				September 30,
	2023		2022		2023		2022
	(in thousands)				(in thousands)
Stock option awards	$	676	$	614	$	2,009	$	1,840
Restricted stock units		481		432		1,443		1,231
Performance-based restricted stock units		156		140		463		418
Total share-based compensation	$	1,313	$	1,186	$	3,915	$	3,489

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

	Three months ended				Nine months ended
	September 30,				September 30,
	2023		2022		2023		2022
	(in thousands)				(in thousands)
Cost of sales	$	168	$	142	$	504	$	415
Sales and marketing		248		205		712		607
General and administrative		765		720		2,310		2,127
Research and development		132		119		389		340
Total stock-based compensation	$	1,313	$	1,186	$	3,915	$	3,489

During the nine months ended September 30, 2023 and 2022, we granted options for the purchase of 1,660 and 2,052 shares of our common stock, we granted restricted stock units of 944 and 728, and granted performance-based restricted stock units of 310 and 250, respectively. We issued approximately 180,000 and 81,000 shares of common stock following the exercise or vesting of underlying stock options or restricted stock units during the nine months ended September 30, 2023 and 2022, respectively.