| Property Plant And Equipment (Detail) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2012 | Mar. 31, 2012 | 
|---|---|---|
| Property, Plant and Equipment [Line Items] | ||
| Equipment | $ 1,385 | $ 1,310 | 
| Furniture & fixtures | 520 | 484 | 
| Leasehold improvements | 203 | 184 | 
| Property, Plant and Equipment, Gross, Total | 2,108 | 1,978 | 
| Accumulated depreciation | (1,791) | (1,748) | 
| Net Property and Equipment | $ 317 | $ 230 | 
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- Definition The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Gross amount, at the balance sheet date, of long-lived, depreciable assets commonly used in offices and stores. Examples include desks, chairs, and store fixtures. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Gross amount, at the balance sheet date, of long-lived, depreciable assets that are an addition or improvement to assets held under lease arrangement. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Gross amount, as of the balance sheet date, of long-lived, depreciable assets used in the production process to produce goods and services. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Details 
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- Definition Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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