Stockholders' equity | Stockholders’ equity The Company is presently authorized to issue up to 240 million shares of stock, of which 40 million are authorized as preferred stock and 200 million as common stock. Common stock The holders of the common stock are entitled to one vote for each share held at all meetings of stockholders. Dividends and distribution of assets of the Company in the event of liquidation are subject to the preferential rights of any outstanding preferred shares. At March 31, 2017 , the Company had reserved 185,591 shares of common stock for the exercise of options. Recent issuances In January 2017, the Company closed an equity subscription of approximately $25 million with Intrexon for 2,421,073 common shares at a price of $10.326 per share. In December 2016, the Company issued 1,212,908 shares of common stock upon the conversion of the outstanding principal and accrued interest of $10.4 million on a convertible debt facility the Company entered into with Intrexon on February 22, 2016 (the “Convertible Debt”). Restricted stock The Company grants restricted common stock to the Chairman of the Board of Directors as part of his compensation package. Generally, the shares are fully vested upon the third anniversary of the grant date. Unvested shares can be cancelled upon termination of the Chairman’s services. A summary of the Company’s unvested shares of restricted stock as of March 31, 2017 , is as follows: Shares Weighted average grant date fair value Unvested at December 31, 2016 4,169 $ 7.72 Granted — — Vested (687 ) 7.14 Unvested at March 31, 2017 3,482 $ 7.84 During the three months ended March 31, 2017 and 2016 , the Company expensed $4,905 and $3,356 , respectively, related to the Chairman’s restricted stock awards. At March 31, 2017 , the balance of unearned share-based compensation to be expensed in future periods related to the restricted stock awards is $27,289 . The period over which the unearned share-based compensation is expected to be earned is approximately two years. Stock options In 2006, the Company established the 2006 Equity Incentive Plan (the “2006 Plan”). The 2006 Plan provided for the issuance of incentive stock options to employees of the Company and non‑qualified stock options and awards of restricted and direct stock purchases to Directors, officers, employees, and consultants of the Company. In accordance with its original terms, no further shares may be granted under the 2006 Plan subsequent to March 18, 2016. All outstanding awards under the 2006 Plan will continue until their individual termination dates. In March 2016, the Company’s Board of Directors adopted the AquaBounty Technologies, Inc. 2016 Equity Incentive Plan (the “2016 Plan”) to replace the 2006 Plan. The 2016 Plan provides for the issuance of incentive stock options, non‑qualified stock options, and awards of restricted and direct stock purchases to Directors, officers, employees, and consultants of the Company. The aggregate number of shares of common stock that may be issued pursuant to awards granted under the 2016 Plan cannot exceed 450,000 . The 2016 Plan was approved by the Company’s shareholders at its Annual Meeting on April 26, 2016. As of March 31, 2017 , no awards have been granted under the 2016 Plan. The Company’s option activity under the 2006 Plan is summarized as follows: Number of Weighted Outstanding at December 31, 2016 185,591 $ 7.89 Issued — — Exercised — — Expired — — Outstanding at March 31, 2017 185,591 $ 7.89 Exercisable at March 31, 2017 183,840 $ 7.90 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. There were no stock options granted or exercised during the three months ended March 31, 2017 . The total intrinsic value of all options outstanding was $936,575 and $602,773 at March 31, 2017 , and December 31, 2016 , respectively. The total intrinsic value of exercisable options was $928,713 and $597,872 at March 31, 2017 , and December 31, 2016 , respectively. The following table summarizes information about options outstanding and exercisable at March 31, 2017 : Weighted average exercise price of outstanding options Number of options outstanding Weighted average remaining estimated life (in years) Number of options exercisable Weighted average price of outstanding and exercisable options $3.30 87,671 2.3 87,671 $3.60 800 5.3 800 $5.70 10,336 7.9 9,883 $6.90 29,038 4.3 27,740 $7.50 15,837 6.1 15,837 $9.60 8,300 8.4 8,300 $9.90 800 1.3 800 $10.50 1,600 6.3 1,600 $10.80 2,400 7.3 2,400 $19.50 2,554 0.2 2,554 $23.40 26,255 6.8 26,255 185,591 183,840 $7.90 Total share-based compensation on stock-option grants amounted to $7,156 and $56,556 for the three months ended March 31, 2017 and 2016 , respectively. At March 31, 2017 , the balance of unearned share‑based compensation to be expensed in future periods related to unvested share‑based awards is $6,355 . The period over which the unearned share‑based compensation is expected to be earned is approximately one year. |