Shareholders' Equity - Additional Information (Detail) (USD $)				6 Months Ended
Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Minimum	Sep. 30, 2013 Maximum	Sep. 30, 2013 Stock Options 1	Sep. 30, 2013 Stock Options 2
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding	50,000	50,000			25,000	25,000
Options outstanding and exercisable with exercise prices			$ 3.07	$ 3.19
Option outstanding, expiration period					2016-01	2016-11

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant