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Stockholders' Equity (Details) - Employee Stock Option [Member] - shares	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options/Warrants, Beginning Balance	13,820,000	10,960,800
Number of Options, Issued	500,000	3,400,000
Number of Options, Expired		(550,000)
Number of Options, Exercised		(40,800)
Number of Options/Warrants, Ending balance	14,320,000	13,820,000

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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Number of share options (or share units) exercised during the current period.

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