Stockholders' equity | Stockholders’ equity Recent issuances In January 2018, the Company completed a public offering of 3,692,307 Common Shares and warrants for 4,246,153 Common Shares. Net proceeds to the Company were $10.6 million after deducting discounts, fees, and expenses. Intrexon Corporation, the Company’s majority shareholder, participated in the offering, purchasing 1,538,461 Common Shares and warrants for 1,538,461 Common Shares for gross proceeds of $5.0 million . In March 2018, the Company issued 76,981 Common Shares in conjunction with the exercise of warrants, with total proceeds of $250,188 . Warrants In connection with a public offering of Common Shares that was completed in January 2018, the Company issued warrants to purchase 4,246,153 Common Shares. Each warrant has an exercise price per share of $3.25 , is immediately exercisable, and will expire five years from the date of issuance. The following table summarizes information about outstanding warrants at March 31, 2018 : Number of warrant shares Weighted average exercise price Outstanding at December 31, 2017 Issued 4,246,153 $3.25 Exercised (76,981 ) 3.25 Outstanding at March 31, 2018 4,169,172 $3.25 Exercisable at March 31, 2018 4,169,172 $3.25 Share-based compensation Restricted stock A summary of the Company’s unvested shares of restricted stock as of March 31, 2018 , is as follows: Shares Weighted average grant date fair value Unvested at December 31, 2017 2,697 $11.37 Granted 11,151 2.50 Vested (1,004 ) 7.02 Unvested at March 31, 2018 12,844 $4.01 During the three months ended March 31, 2018 and 2017 , the Company expensed $6,967 and $4,905 , respectively, related to the Chairman’s restricted stock awards. At March 31, 2018 , the balance of unearned share-based compensation to be expensed in future periods related to the restricted stock awards is $51,346 . The period over which the unearned share-based compensation is expected to be earned is approximately 2.8 years. Stock options The Company’s option activity is summarized as follows: Number of options Weighted average exercise price Outstanding at December 31, 2017 227,203 $9.39 Issued 113,561 2.50 Outstanding at March 31, 2018 340,764 $7.09 Exercisable at March 31, 2018 207,390 $8.37 Unless otherwise indicated, options issued to employees, members of the Board of Directors, and non-employees are vested over one to three years and are exercisable for a term of ten years from the date of issuance. The weighted average fair value of stock options granted during the three months ended March 31, 2018 , was $1.65 . The total intrinsic value of all options outstanding was $51,102 and $17,454 at March 31, 2018 , and December 31, 2017 , respectively. The total intrinsic value of exercisable options was $4,480 and $17,454 at March 31, 2018 , and December 31, 2017 , respectively. The following table summarizes information about options outstanding and exercisable at March 31, 2018 : Weighted average exercise price of outstanding options Number of options outstanding Weighted average remaining estimated life (in years) Number of options exercisable Weighted average exercise price of outstanding and exercisable options $2.50 - $5.70 204,034 6.4 100,427 $6.90 - $9.60 53,175 4.5 52,989 $9.90 - $10.80 4,800 4.9 4,800 $14.20 - $23.40 78,755 8.0 49,174 340,764 207,390 $8.37 Total share-based compensation on stock-option grants amounted to $41,579 and $7,156 for the three months ended March 31, 2018 and 2017 , respectively. At March 31, 2018 , the balance of unearned share-based compensation to be expensed in future periods related to unvested share-based awards was $305,761 . The period over which the unearned share-based compensation is expected to be earned is approximately 1.9 years. |