Note 2. Basic and Diluted Net Loss per Common Share (Detail) - Equity Securities Excluded From The Calculation of Fully Diluted Loss Per Share	6 Months Ended
Sep. 30, 2012	Sep. 30, 2011
Anti-Dilutive Securities	20,848,949	9,855,726
Convertible Debt Securities [Member]
Anti-Dilutive Securities	12,500,000
Stock Options [Member]
Anti-Dilutive Securities	6,291,179	7,549,017
Warrant [Member]
Anti-Dilutive Securities	1,880,620	1,880,620
Restricted Stock [Member]
Anti-Dilutive Securities	177,150	426,089

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-URI http://asc.fasb.org/extlink&oid=6510752

Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

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+ Details