| Intangible Assets - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended | |
|---|---|---|
| Mar. 31, 2013 | Mar. 31, 2012 | |
| Goodwill And Intangible Assets [Line Items] | ||
| Increase In Intangible Assets | $ 4,471 | |
| Unamortizable Intangible Assets, Impairment of intangibles | 2,319 | |
| Amortization expense, in cost of revenues | 530 | 230 | 
| Trade name / Trademark | ||
| Goodwill And Intangible Assets [Line Items] | ||
| Indefinite intangible assets excluded from amortization schedule | $ 154 | |
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- Definition Amortization of property, plant and equipment directly related to goods produced and sold and services rendered by an entity during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition The increase (decrease) during the reporting period in intangible assets (for example patents and licenses). Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Carrying amount of assets (excluding financial assets) that lack physical substance, excluding goodwill, having a projected indefinite period of benefit. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Impairment recognized during the period and allocated to the reportable segment that results from the write-down of indefinite-lived intangible assets after comparing the implied fair value of reporting unit indefinite-lived intangible assets with the carrying amount of that indefinite-lived intangible assets, which are assessed at least annually for impairment. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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