Note 9 - Share-based Compensation

9 Months Ended

Sep. 30, 2019

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, 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,
	2019		2018		2019		2018
	(in thousands)				(in thousands)
Stock option awards	$	378	$	331	$	1,257	$	1,111
Restricted stock units		277		206		838		683
Total share-based compensation	$	655	$	537	$	2,095	$	1,794

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

	Three months ended				Nine months ended
	September 30,				September 30,
	2019		2018		2019		2018
	(in thousands)				(in thousands)
Cost of sales	$	75	$	61	$	233	$	209
Sales and marketing		155		155		459		429
General and administrative		356		266		1,194		967
Research and development		69		55		209		189
Total stock-based compensation	$	655	$	537	$	2,095	$	1,794

We did

not

grant any options during the

nine

-month periods ended

September 30, 2019

or

2018.

Awards of restricted stock units during both periods were immaterial.

We issued approximately

385,000

and

329,000

shares of common stock following the exercise or vesting of underlying stock options or restricted stock units during the

nine

months ended

September 30, 2019

and

2018,

respectively.