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Intangible Assets | 12 Months Ended
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Mar. 31, 2013
Intangible Assets [Abstract] |
Intangible Assets | 7. Intangible Assets Intangible assets at March 31, 2013 and 2012 consisted of the following (in thousands):
|  | 2013 |  |  | 2012 |  |
|  | Gross |  | Accumulated |  | Net Book |  |  | Gross |  | Accumulated |  | Net Book |  | Estimated
|  | Amount |  | Amortization |  | Value |  |  | Amount |  | Amortization |  | Value |  | Useful Life
Licenses | $ | 5,349 | $ | (3,366) | $ | 1,983 |  | $ | 5,360 | $ | (2,689) | $ | 2,671 |  | 7
Trade names and trademarks |  | 1,165 |  | (1,040) |  | 125 |  |  | 1,212 |  | (909) |  | 303 |  | 7
Core technology and know-how |  | 5,453 |  | (4,812) |  | 641 |  |  | 5,611 |  | (4,813) |  | 798 |  | 5-10
Intangible assets | $ | 11,967 | $ | (9,218) | $ | 2,749 |  | $ | 12,183 | $ | (8,411) | $ | 3,772 |  |
The Company recorded intangible amortization expense of $0.9 million, $2.6 million, and $2.9 million for the years ended March 31, 2013, 2012, and 2011, respectively. During the fourth quarter of the year ended March 31, 2012, the Company elected to change its accounting policy for legal costs to defend and maintain its patents. Historically, the Company capitalized these costs and amortized them over the useful lives of the patents. At that time, the Company determined a change to expense these costs as incurred is preferable, and elected to make that change by expensing the remaining unamortized patent costs of $4.9 million. Expected future amortization expense related to intangible assets is as follows (in thousands):
For the years ended March 31, |  | Total
2014 | $ | 754
2015 |  | 573
2016 |  | 568
2017 |  | 553
2018 |  | 301
Thereafter |  | -
Total | $ | 2,749
The geographic composition of intangible assets is as follows (in thousands):
|  | March 31,
|  | 2013 |  | 2012
Intangible assets by geography: |  |  |  |
U.S. | $ | 2,624 | $ | 3,469
Europe |  | 125 |  | 303
Total | $ | 2,749 | $ | 3,772
The business segment composition of intangible assets is as follows (in thousands):
|  | March 31,
|  | 2013 |  | 2012
Intangible assets by business segments: |  |  |  |
Wind | $ | 152 | $ | 1,119
Grid |  | 2,597 |  | 2,653
Total | $ | 2,749 | $ | 3,772

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 44, 45, 46 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16373-109275 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16265-109275 + Details
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