Stock Incentive Plans

The Company has a stock-based compensation program that provides equity incentives for employees, consultants and directors. This program includes incentive and non-statutory stock options and non-vested stock awards (referred to as restricted stock unit awards) granted under two plans: the FLIR Systems, Inc. 2002 Stock Incentive Plan (the “2002 Plan”) and the FLIR Systems, Inc. 2011 Stock Incentive Plan (the “2011 Plan”). The Company has discontinued issuing awards out of the 2002 Plan but previously-granted awards under the 2002 Plan remain outstanding.

The Company has granted time-based options, time-based restricted stock unit awards, market-based restricted stock unit awards and performance-based restricted stock unit awards. Options generally expire ten years from the grant date. Time-based options and restricted stock unit awards generally vest over a three year period. Market-based restricted stock unit awards may be earned based upon the Company's total shareholder return compared to the total shareholder return of the component company at the 60th percentile level in the S&P 500 Index over a three year period. Performance-based restricted stock unit awards granted during the year ended December 31, 2016 may be earned based upon the Company's return on invested capital over a three year period. Performance-based restricted stock unit awards granted during the year ended December 31, 2017 may be earned based upon the Company's operating margin performance over a three year period. Performance-based restricted stock unit awards granted during the year ended December 31, 2018 may be earned based upon a combination of the Company's revenue and operating performance over a three year period. Certain shares vested under the performance-based restricted stock unit awards and the market-based restricted stock unit awards must be held by the participant for a period of one year from the vest date.

Employee Stock Purchase Plan

The Company has an Employee Stock Purchase Plan (the “ESPP”) which allows employees to purchase shares of the Company’s common stock at 85 percent of the fair market value at the lower of either the date of enrollment or the purchase date. The ESPP provides for six-month offerings commencing on May 1 and November 1 of each year with purchases on April 30 and October 31 of each year. Shares purchased under the 2009 ESPP must be held by employees for a period of at least 18 months after the date of purchase. On April 19, 2019, the Company's shareholders approved the FLIR Systems, Inc. 2019 Employee Stock Purchase Plan ("2019 ESPP"). The final purchase under the 2009 ESPP was on April 30, 2019 and the first offering under the 2019 ESPP commenced on May 1, 2019.

Note 3. Stock-based Compensation - (Continued)

The following table sets forth the stock-based compensation expense recognized in the Consolidated Statements of Income (in thousands):



	Three Months Ended March 31,
	2019		2018
Cost of goods sold	$	847	$	695
Research and development	1,708		1,409
Selling, general and administrative	5,535		3,827
Stock-based compensation expense before income taxes	$	8,090	$	5,931

Stock-based compensation expense capitalized in the Consolidated Balance Sheets is as follows (in thousands):



	March 31,
	2019		2018
Capitalized in inventory	$	1,279	$	1,057

As of March 31, 2019, the Company had approximately $45.5 million of total unrecognized stock-based compensation costs, net of estimated forfeitures, to be recognized over a weighted average period of two years.