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Intangible Assets (Tables) | 12 Months Ended
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Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Intangible Assets | Intangible assets at March 31, 2017 and 2016 consisted of the following (in thousands):
| 2017 |  | 2016 |  |
| Gross Amount |  | Accumulated Amortization |  | Net Book Value |  | Gross Amount |  | Accumulated Amortization |  | Net Book Value |  | Estimated Useful Life
Licenses | $ | 4,422 |  |  | $ | (4,134 | ) |  | $ | 288 |  |  | $ | 4,422 |  |  | $ | (3,739 | ) |  | $ | 683 |  |  | 7
Core technology and know-how | 4,806 |  |  | (4,793 | ) |  | 13 |  |  | 5,010 |  |  | (4,839 | ) |  | 171 |  |  | 5-10
Intangible assets | $ | 9,228 |  |  | $ | (8,927 | ) |  | $ | 301 |  |  | $ | 9,432 |  |  | $ | (8,578 | ) |  | $ | 854 |  |  |
Schedule of Expected Future Amortization Expense | Expected future amortization expense related to intangible assets is as follows (in thousands):
Fiscal years ending March 31, | Total
2018 | 301 |
Total | $ | 301 |
Schedule of Geographic Composition of Goodwill And Intangible Assets | The geographic composition of intangible assets is as follows (in thousands):
| March 31,
| 2017 |  | 2016
Intangible assets by geography: |  |  |
U.S. | $ | 301 |  |  | $ | 854 |
Total | $ | 301 |  |  | $ | 854 |
Schedule of Business Segment Composition of Intangible Assets | The business segment composition of intangible assets is as follows (in thousands):
| March 31,
| 2017 |  | 2016
Intangible assets by business segments: |  |  |
Grid | 301 |  |  | 854 |
Total | $ | 301 |  |  | $ | 854 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance and exist in perpetuity, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b),(d) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 + Details
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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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