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8. Stock-Based Compensation (Tables) | 6 Months Ended
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Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract] |
Employee stock-based compensation expense |
|  | Three Months |  |  | Six Months |
|  | Ended |  |  | Ended |
|  | September 30, |  |  | September 30, |
|  | 2014 |  |  | 2013 |  |  | 2014 |  |  | 2013 |
Cost of service revenue |  | $ | 59,000 |  |  | $ | 30,000 |  |  | $ | 123,000 |  |  | $ | 56,000 |
Research and development |  |  | 82,000 |  |  |  | 45,000 |  |  |  | 178,000 |  |  |  | 78,000 |
Selling, general and administrative |  |  | 315,000 |  |  |  | 221,000 |  |  |  | 606,000 |  |  |  | 349,000 |
Total stock-based compensation |  | $ | 456,000 |  |  | $ | 296,000 |  |  | $ | 907,000 |  |  | $ | 483,000 |
Weighted average assumptions of fair falue of employee stock options |
|  | Three and Six Months Ended September 30, |  |  | Six Months Ended September 30, |
|  | 2014 |  |  | 2013 |  |  | 2014 |  |  | 2013 |
Expected life |  | 8.90 years |  |  | 5.89 years |  |  | 5.89 years |  |  | 5.89 years |
Risk-free interest rate |  |  | 2.32% |  |  |  | 1.42% |  |  |  | 1.42% |  |  |  | 1.42% |
Dividend yield |  |  | 0.00% |  |  |  | 0.00% |  |  |  | 0.00% |  |  |  | 0.00% |
Volatility |  |  | 98% |  |  |  | 86% |  |  |  | 86% |  |  |  | 86% |
Fair value of options granted |  | $ | 2.39 |  |  | $ | 2.10 |  |  | $ | 2.10 |  |  | $ | 2.10 |
Summary of option activity |
|  | Number of Shares |  |  | Weighted- Average Exercise Price |  |  | Weighted- Average Contractual Term |  |  | Aggregate Intrinsic Value |
Outstanding at April 1, 2014 |  |  | 2,536,000 |  |  | $ | 7.78 |  |  |  |  |  |  |  |  |
Options granted |  |  | 245,000 |  |  |  | 2.76 |  |  |  |  |  |  |  |  |
Options exercised |  |  | – |  |  |  | – |  |  |  |  |  |  |  |  |
Options forfeited or expired |  |  | (27,000 | ) |  |  | 20.88 |  |  |  |  |  |  |  |  |
Outstanding at September 30, 2014 |  |  | 2,754,000 |  |  | $ | 7.21 |  |  |  | 8.24 |  |  | $ | – |
Exercisable at September 30, 2014 |  |  | 1,197,000 |  |  | $ | 11.62 |  |  |  | 6.71 |  |  | $ | – |
Options available for grant as of September 30, 2014 |  |  | 1,579,000 |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Tabular disclosure of the assumptions used to determine for pension plans and/or other employee benefit plans the benefit obligation and net benefit cost, including assumed discount rates, rate increase in compensation increase, and expected long-term rates of return on plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the changes in other outstanding share-based compensation awards other than stock options or nonvested awards. + 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)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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