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Options - Schedule of Stock Option Activity (Details) - USD ($) | 1 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
May 31, 2019 | Apr. 30, 2019 | Apr. 30, 2018 | Apr. 30, 2017 | Jun. 30, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Share-based Payment Arrangement [Abstract] |  |  |  |  |  |  |
Number of Options Outstanding, Beginning Balance |  |  |  |  | 1,732,846 | 1,197,846 | 1,044,500
Number of Options Exercisable, Beginning Balance |  |  |  |  | 1,107,259 | 781,300 | 584,000
Number of Options, Granted | 505,000 | 505,000 | 560,400 | 253,846 | 505,000 | 560,400 | 263,846
Number of Options, Forfeited |  |  |  |  |  | (25,400) | (35,000)
Number of Options, Expired |  |  |  |  |  |  | (75,000)
Number of Options Outstanding, Ending Balance |  |  |  |  | 2,237,846 | 1,732,846 | 1,197,846
Number of Options Exercisable, Ending Balance |  |  |  |  | 1,239,384 | 1,107,259 | 781,300
Weighted Average Exercise Price Outstanding, Beginning Balance |  |  |  |  | $ 1.19 | $ 0.97 | $ 0.92
Weighted Average Exercise Price Exercisable, Beginning Balance |  |  |  |  | 0.96 | 1.02 | 1.05
Weighted Average Exercise Price, Granted |  |  |  |  | 0.43 | 0.50 | 0.64
Weighted Average Exercise Price, Forfeited |  |  |  |  |  | 0.46 | 1.02
Weighted Average Exercise Price, Expired |  |  |  |  |  |  | 1.13
Weighted Average Exercise Price Outstanding, Ending Balance |  |  |  |  | 0.73 | 1.19 | 0.97
Weighted Average Exercise Price Exercisable, Ending Balance |  |  |  |  | $ 0.91 | $ 0.96 | $ 1.02
Contractual Life in Years Outstanding, Beinning Balance | 10 years | 10 years |  |  | 6 years 11 months 23 days | 6 years 11 months 15 days | 3 years 4 months 17 days
Contractual Life in Years Exercisable, Beinning Balance |  |  |  |  | 5 years 10 months 28 days | 6 years 3 months 19 days | 3 years 7 days
Contractual Life in Years, Granted |  |  |  |  | 9 years 10 months 10 days | 9 years 3 months 4 days | 9 years 18 days
Contractual Life in Years, Forfeited |  |  |  |  | 0 years | 9 years 22 days | 8 years 2 months 30 days
Contractual Life in Years, Expired |  |  |  |  | 0 years | 0 years | 4 years 6 months 14 days
Contractual Life in Years Outstanding, Ending Balance |  |  |  |  | 7 years 3 months 8 days | 6 years 11 months 23 days | 6 years 11 months 15 days
Contractual Life in Years Exercisable, Ending Balance |  |  |  |  | 5 years 9 months 7 days | 5 years 10 months 28 days | 6 years 3 months 19 days
Intrinsic Value Outstanding, Beginning Balance |  |  |  |  |  |  |
Intrinsic Value Exercisable, Beginning Balance |  |  |  |  |  |  |
Intrinsic Value Outstanding, Ending Balance |  |  |  |  | 88,350 |  |
Intrinsic Value Exercisable, Ending Balance |  |  |  |  | $ 8,809 |  |

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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Granted. + References No definition available. + Details
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- Definition 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) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition 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. + 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) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements. + 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)(iv)(4) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + 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 -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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