The weighted average grant date fair values of options granted during the three months ended September 30, 2018 and 2017 was $1.96 and $5.58, respectively, and the weighted average grant date fair values of options granted during the six months ended September 30, 2018 and 2017 was $2.20 and $6.01, respectively.

Share-based awards compensation expense is as follows:

At September 30, 2018, there were unrecognized compensation costs of $1,450,000 related to stock options which is expected to be recognized over a weighted-average amortization period of 1.56 years. At September 30, 2017, there were unrecognized compensation costs of $2,999,000 related to stock options which is expected to be recognized over a weighted-average amortization period of 2.43 years.

At September 30, 2018, there were unrecognized compensation costs of $111,000 related to restricted stock which is expected to be recognized over a weighted-average amortization period of 1.53 years. At September 30, 2017, there were unrecognized compensation costs of $239,000 related to restricted stock which is expected to be recognized over a weighted-average amortization period of 1.69 years.

No income tax benefit has been recognized relating to stock-based compensation expense and no tax benefits have been realized from exercised stock options.

Stock-Based Award Activity

Stock options award activity is as follows:

The aggregate intrinsic value of stock options is calculated as the difference between the exercise price of the underlying stock options and the fair value of the Company’s common stock, or $1.46 per share at September 30, 2018.

Restricted stock award activity is as follows:

The Company did not capitalize any cost associated with stock-based compensation.

The Company issues new shares of common stock upon exercise of stock options or release of restricted stock awards.

The Company issues new shares of common stock upon exercise of stock based awards.