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Share-Based Payments (Tables) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2015 | Apr. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] | As of January 31, 2015, $158 of stock compensation is included within accrued liabilities line item on the balance sheet. Stock-based compensation expense was recognized as follows (in thousands):
|  | Three Months Ended |  | Nine Months Ended |
|  | January 31, |  | January 31, |
|  | 2015 |  | 2014 |  | 2015 |  | 2014 |
General and administrative |  | $ | 474 |  | $ | 866 |  | $ | 1,530 |  | $ | 1,686 |
Sales and marketing |  |  | 114 |  |  | 63 |  |  | 447 |  |  | 189 |
Research and development |  |  | 65 |  |  | 4 |  |  | 267 |  |  | 19 |
TOS cost of sales |  |  | 2 |  |  | 2 |  |  | 20 |  |  | 12 |
POS cost of sales |  |  | 2 |  |  | 6 |  |  | 20 |  |  | 62 |
Total stock-based compensation expense |  | $ | 657 |  | $ | 941 |  | $ | 2,284 |  | $ | 1,968 |
| Stock-based compensation costs were recorded as follows (in thousands):
|  | Year Ended April 30, |
|  | 2014 |  | 2013 |
General and administrative |  | $ | 2,298 |  | $ | 1,984 |
Sales and marketing |  |  | 352 |  |  | 263 |
Research and development |  |  | 36 |  |  | 37 |
TOS cost of sales |  |  | 56 |  |  | 20 |
POS cost of sales |  |  | 65 |  |  | 72 |
Total stock-based compensation expense |  | $ | 2,807 |  | $ | 2,376 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] | Black-Scholes assumptions used to calculate the fair value of options granted during the three and nine months ended January 31, 2015 and 2014 were as follows (in thousands):
|  | Three Months Ended |  | Nine Months Ended |
|  | January 31, |  | January 31, |
|  | 2015 |  | 2014 |  | 2015 |  | 2014 |
Expected term in years |  | - |  | 5 - 6 |  | 3 - 6 |  | 5 - 6 |
Risk-free interest rates |  | - |  | 1.4% - 2.1% |  | 0.79% - 1.94% |  | 0.8% - 2.4% |
Volatility |  | - |  | 97% - 102% |  | 85.8% - 102.1% |  | 97% - 102% |
Dividend yield |  | - |  | 0% |  | 0% |  | 0% |
| Black-Scholes assumptions used to calculate the fair value of options granted during the years ended April 30, 2014 and 2013 were as follows:
|  | Year Ended April 30, |
|  | 2014 |  | 2013 |
Expected term in years |  |  | 3.0 - 6.0 |  |  | 3.0 - 6.0 |
Risk-free interest rates |  |  | 0.7% - 2.4% |  |  | 0.7% - 1.3% |
Volatility |  |  | 84% - 102% |  |  | 88% - 104% |
Dividend yield |  |  | 0% |  |  | 0% |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] | The Company’s stock options activity for the nine months ended January 31, 2015 is as follows:
|  |  |  |  |  |  |  |  |  | Weighted |  |  |
|  |  |  |  |  |  |  | Weighted |  | Average |  |  |
|  |  |  | Directors |  |  |  | Average |  | Remaining |  | Aggregate |
|  | Non- |  | and |  |  |  | Exercise |  | Contractual |  | Intrinsic |
|  | Employees |  | Employees |  | Total |  | Price |  | Life (Years) |  | Value |
Outstanding, May 1, 2014 |  | 765,000 |  | 22,586,037 |  | 23,351,037 |  | $ | 1.01 |  | 7.5 |  | $ | 985 |
Granted |  | 80,000 |  | 1,013,175 |  | 1,093,175 |  |  | 0.72 |  | 5.9 |  |  | - |
Exercised |  | - |  | (3,750) |  | (3,750) |  |  | 0.49 |  |  |  |  |  |
Forfeited |  | - |  | (101,250) |  | (101,250) |  |  | 0.96 |  |  |  |  |  |
Expired |  | (150,000) |  | (199,204) |  | (349,204) |  |  | 1.04 |  |  |  |  |  |
Outstanding, January 31, 2015 |  | 695,000 |  | 23,295,008 |  | 23,990,008 |  |  | 1.00 |  | 6.6 |  |  | 63 |
Vested and expected to vest as of January 31, 2015 |  | 695,000 |  | 23,295,008 |  | 23,990,008 |  |  | 1.00 |  | 6.6 |  |  | 63 |
Exercisable as of January 31, 2015 |  | 487,500 |  | 16,544,466 |  | 17,031,966 |  |  | 0.91 |  | 5.8 |  |  | 62 |
| The Company’s stock options activity and related information as of and for the years ended April 30, 2014 and 2013 is as follows (dollars in thousands):
|  |  |  |  |  |  |  |  |  |  |  |  |  | Weighted |  |  |
|  |  |  |  |  |  |  |  |  |  | Weighted |  | Average |  |  |
|  |  |  |  | Directors |  |  |  |  | Average |  | Remaining |  | Aggregate |
|  | Non- |  | and |  |  |  |  | Exercise |  | Contractual |  | Intrinsic |
|  | Employees |  | Employees |  | Total |  | Price |  | Life (Years) |  | Value |
Outstanding, May 1, 2013 |  |  | 765,000 |  |  | 13,125,205 |  |  | 13,890,205 |  | $ | 0.85 |  |  | 7.0 |  | $ | 89,000 |
Granted |  |  | - |  |  | 9,793,332 |  |  | 9,793,332 |  |  | 1.23 |  |  |  |  |  |  |
Exercised |  |  | - |  |  | (33,750) |  |  | (33,750) |  |  | 0.63 |  |  |  |  |  |  |
Canceled |  |  | - |  |  | - |  |  | - |  |  | - |  |  |  |  |  |  |
Forfeited |  |  | - |  |  | (72,500) |  |  | (72,500) |  |  | 0.82 |  |  |  |  |  |  |
Expired |  |  | - |  |  | (226,250) |  |  | (226,250) |  |  | 0.73 |  |  |  |  |  |  |
Outstanding, April 30, 2014 |  |  | 765,000 |  |  | 22,586,037 |  |  | 23,351,037 |  |  | 1.01 |  |  | 7.5 |  | $ | 985,000 |
Vested and expected to vest as of April 30, 2014 |  |  | 765,000 |  |  | 22,586,037 |  |  | 23,351,037 |  |  |  |  |  | 7.5 |  | $ | 985,000 |
Exercisable as of April 30, 2014 |  |  | 522,292 |  |  | 13,042,285 |  |  | 13,564,577 |  |  | 0.85 |  |  | 6.1 |  | $ | 927,000 |
|  |  |  |  |  |  |  |  |  |  |  |  |  | Weighted |  |  |
|  |  |  |  |  |  |  |  |  |  | Weighted |  | Average |  |  |
|  |  |  |  | Directors |  |  |  |  | Average |  | Remaining |  | Aggregate |
|  | Non- |  | and |  |  |  |  | Exercise |  | Contractual |  | Intrinsic |
|  | Employees |  | Employees |  | Total |  | Price |  | Life (Years) |  | Value |
Outstanding, May 1, 2012 |  |  | 1,410,000 |  |  | 13,456,038 |  |  | 14,866,038 |  | $ | 0.88 |  |  | 7.6 |  | $ | - |
Granted |  |  | 130,000 |  |  | 611,250 |  |  | 741,250 |  |  | 0.41 |  |  |  |  |  |  |
Exercised |  |  | - |  |  | - |  |  | - |  |  | - |  |  |  |  |  |  |
Canceled |  |  | - |  |  | (25,000) |  |  | (25,000) |  |  | 0.62 |  |  |  |  |  |  |
Forfeited |  |  | - |  |  | (551,250) |  |  | (551,250) |  |  | 0.72 |  |  |  |  |  |  |
Expired |  |  | (775,000) |  |  | (365,833) |  |  | (1,140,833) |  |  | 0.95 |  |  |  |  |  |  |
Outstanding, April 30, 2013 |  |  | 765,000 |  |  | 13,125,205 |  |  | 13,890,205 |  |  | 0.85 |  |  | 7.0 |  | $ | 89,000 |
Vested and expected to vest as of April 30, 2013 |  |  | 765,000 |  |  | 13,125,205 |  |  | 13,890,205 |  |  |  |  |  | 7.0 |  | $ | 89,000 |
Exercisable as of April 30, 2013 |  |  | 458,334 |  |  | 10,886,120 |  |  | 11,344,454 |  |  | 0.86 |  |  | 6.9 |  | $ | 54,000 |
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] |  | A summary of the activity related to restricted stock grants for the years ended April 30, 2014 and 2013 is as follows (dollars in thousands):
|  | 2014 |  | 2013 |
|  |  |  |  | Weighted |  |  |  |  | Weighted |
|  |  |  |  | Average |  |  |  |  | Average |
|  |  |  |  | Grant Date |  |  |  |  | Grant Date |
|  | Total |  | Fair Value |  | Total |  | Fair Value |
|  | Shares |  | Per Share |  | Shares |  | Per Share |
Nonvested, beginning of period |  |  | 50,000 |  | $ | 0.30 |  |  | 25,000 |  | $ | 0.75 |
Granted |  |  | - |  |  | - |  |  | 100,000 |  |  | 0.30 |
Vested |  |  | (50,000) |  |  | 0.30 |  |  | (75,000) |  |  | 0.45 |
Forfeited |  |  | - |  |  | - |  |  | - |  |  |  |
Expired |  |  | - |  |  | - |  |  | - |  |  |  |
Nonvested, end of period |  |  | - |  |  | - |  |  | 50,000 |  |  | 0.30 |
Warrant [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] | Assumptions used to calculate the fair value of these warrants were as follows:
|  | January 31, |  | April 30, |
|  | 2015 |  | 2014 |
Expected term in years |  | 1.2 - 3.0 |  | 1.9 - 3.7 |
Risk-free interest rates |  | 0.6% - 1.05% |  | 0.4% - 1.17% |
Volatility |  | 73% - 100% |  | 95% - 113% |
Dividend yield |  | 0% |  | 0% |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] | Activity related to these warrants, which expire at various dates through April 2016, is summarized as follows (dollars in thousands):
|  |  |  |  |  | Weighted |  |  |
|  |  |  | Weighted |  | Average |  |  |
|  | Number |  | Average |  | Remaining |  | Aggregate |
|  | of |  | Exercise |  | Contractual |  | Intrinsic |
|  | Shares |  | Price |  | Life (Years) |  | Value |
Outstanding, May 1, 2014 |  | 3,276,667 |  | $ | 0.61 |  | 2.9 |  | $ | 984 |
Granted |  | - |  |  | - |  | - |  |  | - |
Exercised |  | - |  |  | - |  | - |  |  | - |
Expired |  | (150,000) |  |  | - |  | - |  |  | - |
Outstanding, January 31, 2015 |  | 3,126,667 |  | $ | 0.60 |  | 2.3 |  | $ | - |
| Activity related to these warrants, which expire at various dates through April 2016, is summarized as follows (dollars in thousands):
|  |  |  |  |  |  |  | Weighted |  |  |
|  |  |  |  | Weighted |  | Average |  |  |
|  | Number |  | Average |  | Remaining |  | Aggregate |
|  | of |  | Exercise |  | Contractual |  | Intrinsic |
|  | Shares |  | Price |  | Life (Years) |  | Value |
Outstanding, May 1, 2013 |  |  | 3,276,667 |  | $ | 0.61 |  |  | 3.9 |  | $ | - |
Granted |  |  | - |  |  | - |  |  | - |  |  |  |
Exercised |  |  | - |  |  | - |  |  |  |  |  |  |
Forfeited |  |  | - |  |  | - |  |  |  |  |  |  |
Expired |  |  | - |  |  | - |  |  |  |  |  |  |
Outstanding, April 30, 2014 |  |  | 3,276,667 |  | $ | 0.61 |  |  | 2.9 |  | $ | 984,333 |
|  |  |  |  |  |  | Weighted |  |  |  |
|  |  |  |  | Weighted |  | Average |  |  |  |
|  | Number |  | Average |  | Remaining |  | Aggregate |
|  | of |  | Exercise |  | Contractual |  | Intrinsic |
|  | Shares |  | Price |  | Life (Years) |  | Value |
Outstanding, May 1, 2012 |  |  | 1,416,667 |  | $ | 0.50 |  |  | 3.8 |  | $ | - |
Granted |  |  | 1,860,000 |  |  | 0.66 |  |  | 4.8 |  |  |  |
Exercised |  |  | - |  |  | - |  |  |  |  |  |  |
Forfeited |  |  | - |  |  | - |  |  |  |  |  |  |
Expired |  |  | - |  |  | - |  |  |  |  |  |  |
Outstanding, April 30, 2013 |  |  | 3,276,667 |  | $ | 0.61 |  |  | 3.9 |  | $ | - |

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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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