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Stock-Based Compensation and Warrants (Tables) | 6 Months Ended
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Dec. 31, 2018
Share-based Compensation [Abstract] |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] | The following table sets forth a summary of stock option activity for the six months ended December 31, 2018:
|  |  |  |  | Weighted |  |  | Weighted Average |
|  | Number of |  |  | Average |  |  | Remaining |
|  | Options |  |  | Exercise Price |  |  | Contractual Life |
Outstanding, June 30, 2018 |  |  | 19,415,246 |  |  | $ | 1.55 |  |  |  | 7.8 |
Granted |  |  | 1,125,000 |  |  |  | 0.52 |  |  |  |  |
Forfeited |  |  | (1,839,642 | ) |  |  | 1.62 |  |  |  |  |
Outstanding, December 31, 2018 |  |  | 18,700,604 |  |  |  | 1.58 |  |  |  | 7.6 |
Exercisable, December 31, 2018 |  |  | 11,744,856 |  |  |  | 1.86 |  |  |  | 6.2 |
Schedule Of Warrants Issued To Agents Activity [Table Text Block] |
|  |  |  |  | Weighted |  |  | Weighted Average |
|  | Number of |  |  | Average |  |  | Remaining |
|  | Warrants |  |  | Exercise Price |  |  | Contractual Life |
Outstanding, June 30, 2018 |  |  | 45,635,217 |  |  | $ | 1.37 |  |  |  | 3.4 |
Warrants issued for consulting services |  |  | 31,248 |  |  |  | 1.00 |  |  |  |  |
Outstanding, December 31, 2018 |  |  | 45,666,465 |  |  |  | 1.37 |  |  |  | 2.8 |
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] | Stock-based compensation expense is included in compensation and benefits under the following captions in the unaudited condensed consolidated statements of operations:
|  | Three Months |  |  | Six Months |
|  | Ended December 31, |  |  | Ended December 31, |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Research and development |  | $ | 61,063 |  |  | $ | 281,814 |  |  | $ | 190,672 |  |  | $ | 580,769 |
General and administrative |  |  | 754,355 |  |  |  | 912,215 |  |  |  | 1,502,697 |  |  |  | 2,120,959 |
Total |  | $ | 815,418 |  |  | $ | 1,194,029 |  |  | $ | 1,693,369 |  |  | $ | 2,701,728 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
Expected volatility |  |  | 84 | %
Risk free interest rate |  |  | 2.83 | %
Expected term (years) |  |  | 7 |
Dividend yield |  |  | 0 | %

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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5047-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 3: 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) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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