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Stock-Based Compensation and Warrants (Tables) | 9 Months Ended
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Mar. 31, 2019
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 under Plans for the nine months ended March 31, 2019 :
|  |  |  |  | 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 |  |  | (3,672,100 | ) |  |  | 1.58 |  |  |
Outstanding, March 31, 2019 |  |  | 16,868,146 |  |  |  | 1.61 |  |  | 6.6
Exercisable, March 31, 2019 |  |  | 12,215,439 |  |  |  | 1.82 |  |  | 6.0
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 |  |  | Nine Months |
|  | Ended March 31, |  |  | Ended March 31, |
|  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Research and development |  | $ | 117,594 |  |  | $ | 289,645 |  |  | $ | 308,266 |  |  | $ | 870,464 |
General and administrative |  |  | 578,453 |  |  |  | 1,184,070 |  |  |  | 2,081,147 |  |  |  | 3,305,029 |
Total |  | $ | 696,047 |  |  | $ | 1,473,715 |  |  | $ | 2,389,413 |  |  | $ | 4,175,493 |
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 | %
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 |  |  | 46,872 |  |  |  | 1.00 |  |  |
Issuance of warrant modification |  |  | 1,207,146 |  |  |  | 0.18 |  |  |
Modified warrant replaced |  |  | (500,000 | ) |  |  | 0.52 |  |  |
Outstanding, March 31, 2019 |  |  | 46,389,235 |  |  |  | 1.35 |  |  | 2.6

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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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