| Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] |
The following table summarizes the components of share-based compensation expense in the condensed consolidated statements of operations (in thousands): | | | Three Months Ended
March 31, | | | | | 2017 | | 2016 | | | Research and development | | $ | 5 | | $ | 6 | | | General and administrative | | | 202 | | | 291 | | | Totals | | $ | 207 | | $ | 297 | | | | | Nine Months Ended
March 31, | | | | | 2017 | | 2016 | | | Research and development | | $ | 16 | | $ | 15 | | | General and administrative | | | 697 | | | 925 | | | Totals | | $ | 713 | | $ | 940 | |
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The following table summarizes the components of share-based compensation expense in the Consolidated Statements of Operations (in thousands): | | | Year Ended
June 30, | | | | | 2016 | | 2015 | | | Research and development | | $ | 20 | | $ | - | | | General and administrative | | | 1,245 | | | 914 | | | Totals | | $ | 1,265 | | $ | 914 | |
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| Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
The following table summarizes all stock option activity during the nine months ended March 31, 2017: | | | Stock
Options | | Weighted-
average
Exercise
Price | | Weighted-
average
Remaining
Contractual
Term (in years) | | Aggregate
Intrinsic Value
(in thousands) | | | Outstanding as of July 1, 2016 | | | 12,273,334 | | $ | 1.31 | | | 6.4 | | $ | 993 | | | Granted | | | 150,000 | | | 0.40 | | | | | | | | | Forfeited | | | (116,665) | | | 1.54 | | | | | | | | | Outstanding as of March 31, 2017 | | | 12,306,669 | | $ | 1.30 | | | 5.6 | | $ | 196 | | | Vested and, as of March 31, 2017, expected to vest | | | 12,276,498 | | $ | 1.30 | | | 5.6 | | $ | 196 | | | | | | | | | | | | | | | | | | Exercisable as of March 31, 2017 | | | 9,478,362 | | $ | 1.30 | | | 4.8 | | $ | 191 | |
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The following table summarizes all stock option activity during the years ended June 30, 2016 and 2015: | | | Stock
Options | | Weighted-
average
Exercise
Price | | Weighted-
average
Remaining
Contractual
Term (in years) | | Aggregate
Intrinsic Value
(in thousands) | | | Outstanding as of July 1, 2014 | | | 8,483,334 | | $ | 1.25 | | | 7.0 | | $ | 179 | | | Granted | | | 1,740,000 | | $ | 0.88 | | | | | | | | | Forfeited/expired | | | (700,000) | | $ | 0.75 | | | | | | | | | Outstanding as of June 30, 2015 | | | 9,523,334 | | $ | 1.22 | | | 6.6 | | $ | 1,848 | | | Granted | | | 2,750,000 | | $ | 1.64 | | | | | | | | | Forfeited/expired | | | - | | $ | - | | | | | | | | | Outstanding as of June 30, 2016 | | | 12,273,334 | | $ | 1.31 | | | 6.4 | | $ | 993 | | | As of June 30, 2016 vested and expected to vest | | | 12,225,441 | | $ | 1.31 | | | 6.4 | | $ | 991 | | | | | | | | | | | | | | | | | | Exercisable as of June 30, 2016 | | | 7,583,357 | | $ | 1.31 | | | 5.1 | | $ | 773 | |
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| Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
The Company estimated the fair value of options granted using the Black-Scholes option pricing model with the following assumptions:
| Risk-free interest rate | | 2.37 | % | | Dividend yield | | 0 | % | | Volatility | | 104.38 | % | | Expected term (in years) | | 9 | |
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The Company estimated the fair value of options granted using the Black-Scholes option pricing model with the following assumptions: | | | 2016 | | 2015 | | | Risk-free interest rate | | | 1.83% - 2.13% | | | 1.3% - 2.3% | | | Dividend yield | | | 0% | | | 0% | | | Volatility | | | 109.49% - 112.17% | | | 96.7% - 113.9% | | | Expected term (in years) | | | 9 | | | 4 - 9 | |
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