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           Cash Flow Statement (Details) (USD $) 
        In Thousands, unless otherwise specified  | 
        9 Months Ended | |
|---|---|---|
| 
           Dec. 31, 2012 
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           Dec. 31, 2011 
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| Cash Flow Statement (Textual) [Abstract] | ||
| Interest paid | $ 55 | $ 9 | 
| Income taxes paid | 949 | 7,000 | 
| Excess tax benefit on stock awards | (2) | 197 | 
| Capital expenditures | 68 | 16 | 
| Capital leases | $ 11 | $ 205 | 
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- Details 
          
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- Definition 
          Future cash outflow to pay for purchases of fixed assets that have occurred. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          The increase during the period in capital lease obligations due to entering into new capital leases. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Amount of excess tax benefit (tax deficiency) that arises when compensation cost from non-qualified share-based compensation recognized on the entity's tax return exceeds (is less than) compensation cost from equity-based compensation recognized in financial statements. Excess tax benefit (tax deficiency) increases (decreases) net cash provided by financing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          The amount of cash paid for interest during the period net of cash paid for interest that is capitalized. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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