Note 10 - Share-based Compensation

3 Months Ended

Mar. 31, 2021

Notes to Financial Statements

Share-based Payment Arrangement [Text Block]

10. 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, 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
	March 31,
	2021		2020
	(in thousands)
Stock option awards	$	594	$	500
Restricted stock units		333		279
Total share-based compensation	$	927	$	779

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

	Three months ended
	March 31,
	2021		2020
	(in thousands)
Cost of sales	$	100	$	81
Sales and marketing		169		159
General and administrative		561		454
Research and development		97		85
Total stock-based compensation	$	927	$	779

We did not grant any options during the three-month periods ended March 31, 2021 or 2020. During the three months ended March 31, 2021 and 2020, we awarded restricted stock units of 694 and 2,100, respectively. We issued approximately 70,000 and 23,000 shares of common stock following the exercise or vesting of underlying stock options or restricted stock units during the three months ended March 31, 2021 and 2020, respectively.