Long Term Debt (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Mar. 31, 2012
Long Term Debt
Long Term Debt	$ 1,564	$ 3,077
Senior Secured Convertible Notes due June 21, 2013
Long Term Debt
Long Term Debt		1,881
Convertible Note
Long Term Debt
Long Term Debt	372	60
Secured Note
Long Term Debt
Long Term Debt	$ 1,192	$ 1,136

Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Name:	us-gaap_LongTermDebtNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant