Note 13. Stock-based Compensation

Stock-based compensation expense related to awards issued under the Company’s stock compensation plans for the three months ended March 31, 2022 and 2021 was as follows (amounts in thousands):

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The Company capitalized $51,000 of stock-based compensation expense associated with the cost of developing software for internal use during the three months ended March 31, 2022.

At March 31, 2022, the total unrecognized compensation cost related to non-vested restricted stock awards was $9.8 million, which is expected to be recognized over a period of approximately 1.67 years. There was no  unrecognized compensation cost related to stock options, as all outstanding stock options were vested at March 31, 2022. There were no grants of stock options during the three months ended March 31, 2022.