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Stock Option Plan (Tables) | 12 Months Ended
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Mar. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Stock-Based Payment Activity |
|  | Year ended March 31,
|  | 2014 |  | 2015 |  | 2016
|  | Number of stock options |  | Weighted average exercise price |  | Number of stock options |  | Weighted average exercise price |  | Number of stock options |  | Weighted average exercise price
Outstanding at beginning of the year |  |  | 1,080,500 |  |  | $ | 7.29 |  |  |  | 132,000 |  |  | $ | 2.14 |  |  | $ | 532,000 |  |  | $ | 2.1 |
Granted during the year |  |  | — |  |  |  | — |  |  |  | 400,000 |  |  |  | 2.09 |  |  |  | — |  |  |  | — |
Exercised during the year |  |  | (230,000 | ) |  |  | 2.14 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Cancelled or expired |  |  | (718,500 | ) |  |  | 9.88 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Outstanding and exercisable at the end of the year |  |  | 132,000 |  |  | $ | 2.14 |  |  |  | 532,000 |  |  | $ | 2.10 |  |  | $ | 532,000 |  |  | $ | 2.1 |
Range of exercise price per share |  | $2.09 to $2.14 |  |  |  |  |  |  | $2.09 to $2.14 |  |  |  |  |  |  | $2.09 to $2.14 |  |  |  |  |

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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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