Schedule of Changes in Common Stock Options (Details)	9 Months Ended
Sep. 30, 2019 $ / shares shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Options, Outstanding at the beginning of the period \| shares	4,303,900
Options, Granted \| shares	405,350
Options, Expired \| shares	(765,000)
Options, Forfeited \| shares	(468,900)
Options, Outstanding at the end of the period \| shares	3,475,350
Options, Exercisable at the end of the period \| shares	1,983,375
Weighted Average Exercise Price, Outstanding at the beginning of the period \| $ / shares	$ 0.75
Weighted Average Exercise Price, Granted \| $ / shares	0.67
Weighted Average Exercise Price, Expired \| $ / shares	2.00
Weighted Average Exercise Price, Forfeited \| $ / shares	0.63
Weighted Average Exercise Price, Outstanding at the end of the period \| $ / shares	0.49
Weighted Average Exercise Price, Exercisable at the end of the period \| $ / shares	$ 0.49

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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-Publisher FASB
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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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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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