Share-based compensation (Tables)

6 Months Ended

Jun. 30, 2018

Share-Based Compensation [Abstract]

Summary of status of company's stock option plan

A summary of the activity for stock options issued under the Company's Plans for the indicated periods is presented below:

Stock Option Totals	Shares			Weighted Average Exercise Price
Outstanding at December 31, 2016		3,214,398		$	2.68
-Exercised		(1,545,161	)	$	2.27
-Granted		1,400,203		$	5.72
Outstanding at December 31, 2017		3,069,440		$	4.28
-Exercised		(5,000	)	$	3.43
-Granted		231,500		$	2.54
-Cancelled		(2,510,243	)	$	4.94
Outstanding at June 30, 2018		785,697		$	1.65

Weighted average contractual life and exercise price

The following is the weighted average contractual life in years and the weighted average exercise price at June 30, 2018 of:

			Weighted Average Remaining	Weighted Average
	Number of Options		Contractual Life	Exercise Price
Options outstanding and vested		666,697	2.3 years	$	1.56