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           Summary of Intangible Assets (Detail) (USD $) 
        In Thousands, unless otherwise specified  | 
        3 Months Ended | 12 Months Ended | 
|---|---|---|
| 
           Jun. 30, 2014 
         | 
        
           Mar. 31, 2014 
         | 
      |
| Goodwill And Intangible Assets [Line Items] | ||
| Intangible assets, beginning balance | $ 9,074 | $ 4,757 | 
| Intangible assets, acquisition | 6,826 | |
| Intangible assets, impairment | (154) | |
| Intangible assets, disposal of subsidiary | (586) | |
| Intangible assets, amortization | (344) | (1,769) | 
| Intangible assets, Adjust goodwill for tax | ||
| Purchase price allocation adjustment | (1,472) | |
| Intangible assets, ending balance | $ 7,258 | $ 9,074 | 
| X | ||||||||||
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- Definition 
          Finite Lived Intangible Assets Income Tax Adjustment No definition available. 
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- Details 
          
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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 
          Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination. No definition available. 
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- Definition 
          Amount of increase (decrease) to assets, excluding financial assets and goodwill, lacking physical substance with a finite life for purchase accounting adjustments. No definition available. 
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- Definition 
          The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Definition 
          Amount of write-off of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit associated with the sale of all or a portion of a reporting unit. No definition available. 
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| X | ||||||||||
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- Definition 
          Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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