Financial instruments at fair value (Details Narrative) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Financial Instruments At Fair Value Details Narrative
Change in fair value of financial instruments	$ 419	$ (35)	$ (57)
Financial instruments at fair value	119
Financial instruments at fair value - non current portion	$ 208

Amount of increase (decrease) in fair value of other financial instruments used in operating activities.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

Name:	us-gaap_IncreaseDecreaseInOtherFinancialInstrumentsUsedInOperatingActivities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration