Total share-based expense related to stock options, restricted stock units (“RSUs”) and common stock awards were approximately $0.2 million during the three months ended March 31, 2020 and 2019, respectively.

Share-based compensation expense is classified in the condensed consolidated statements of operations as follows:

Employee Stock Options

There were no employee stock options or RSUs granted or exercised during the three months ended March 31, 2020 and 2019, respectively. The Company recognized a total of $0.2 million of compensation expense related to employee stock options during the three months ended March 31, 2020 and 2019, respectively.

Non-Employee Stock Options

The Company did not grant any non-employee stock options during the three months ended March 31, 2020 and 2019, respectively. The Company recognized approximately $4,000 of expense during the three months ended March 31, 2020. The Company did not recognize any expense related to non-employee stock options during the three months ended March 31, 2019.

Common Stock Awards

During the three months ended March 31, 2019, the Company granted 685 common stock awards based on the value of the professional services provided and the average stock price during the quarter. As all services were rendered during the three months ended March 31, 2019, approximately $17,000 of expense related to common stock awards was recognized. There were no common stock awards granted during the three months ended March 31, 2020. As of March 31, 2020, there were 8,341 common stock awards authorized but not issued.