DL retains his unexercised options as noted below (excerpt from Options Plan, PTK website) therefore the number of unissued options is limited, this in part may explain the number:

(ii) If an Optionee ceases to be either a Director or Officer of the Corporation or any of its subsidiaries for any reason other than as a result of having been dismissed for cause as provided in section 6 (n) or as a result of the Optionee’s death, such Optionee shall have the right for a period of one year (or until the normal expiry date of the option rights of such Optionee if earlier) from the date of ceasing to be either a Director or Officer to exercise the option under the Plan with respect to all Optioned Shares of such Optionee to the extent they were exercisable on the date of ceasing to be either a Director or Officer. Upon the expiration of such one year period all unexercised option rights of that Optionee shall immediately become terminated and shall lapse notwithstanding the original term of the option granted to such Optionee under the Plan. 

Hogan