Stock Option and bonus plans (Details Narrative 1) - USD ($) $ in Thousands	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Stock Option And Bonus Plans Details Narrative 1
Intrinsic value of options outstanding and exercisable	$ 0	$ 0	$ 0

Intrinsic value of equity-based compensation awards outstanding. Excludes stock and unit options.

No definition available.

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant