Share-based Compensation

9 Months Ended

Sep. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

8. 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 September 30,				Nine months ended September 30,
	2018		2017		2018		2017
	(in thousands)				(in thousands)
Stock option awards	$	331	$	723	$	1,111	$	1,347
Restricted stock units		206		164		683		498

Total share-based compensation	$	537	$	887	$	1,794	$	1,845

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


	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018		2017
	(in thousands)				(in thousands)
Cost of sales	$	61	$	46	$	209	$	141
Sales and marketing		155		78		429		309
General and administrative		266		718		967		1,261
Research and development		55		45		189		134

Total stock-based compensation	$	537	$	887	$	1,794	$	1,845

We did not grant any options during the nine months ended September 30, 2018. Option grants during the nine months ended September 30, 2017 were not material. Awards of restricted and unrestricted stock during the nine month periods ended September 30, 2018 and 2017 were not material.

We issued approximately 329,000 and 702,000 shares of common stock following the exercise or vesting of underlying stock options or restricted stock units in the nine months ended September 30, 2018 and 2017, respectively.