Equity |
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9. Equity |
During the three months ended December 31, 2018 the Company issued 250,000 shares of common stock for the conversion of approximately 250,000 shares of Series B Convertible Preferred Stock, see Note 10.
Restricted Stock
During the three months ended December 31, 2018 no restricted stock was granted or exercised. The restricted shares are to be earned over a three-year period and cliff vest at the end of the third year from the date of grant. Stock-based compensation expense attributable to restricted stock was $0.2 million and $0.0 million for the three months ended December 31, 2018 and 2017, respectively. As of December 31, 2018, there was approximately $1.9 million of unrecognized compensation expense related to restricted stock outstanding.
Warrants
No warrants were granted or exercised during the three months ended December 31, 2018.
Stock Options
As of December 31, 2018, there were stock options outstanding under the Company’s Second Amended and Restated 1997 Stock Option Plan and the Company’s Amended and Restated 2013 Incentive Stock Plan. Both plans were approved by the shareholders. The plans granted specified numbers of options to non-employee directors, and they authorized the Compensation Committee of the Board of Directors to grant either incentive or non-statutory stock options to employees. Vesting periods are established by the Compensation Committee at the time of grant. All stock options outstanding as of December 31, 2018 and September 30, 2018 were non-statutory stock options, had exercise prices equal to the market price on the date of grant, and had expiration dates ten years from the date of grant.
Stock-based compensation expense attributable to stock options and warrants was $0.4 million and $0.3 million for the three months ended December 31, 2018 and 2017, respectively. As of December 31, 2018, there was approximately $2.7 million of unrecognized compensation expense related to unvested stock options outstanding, and the weighted average vesting period for those options was 3.5 years.
The fair value of stock options granted was made using the Black-Scholes option pricing model and the following assumptions:
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