Commitments and Contingencies - Additional Information (Detail) (USD $)	12 Months Ended
Mar. 31, 2014	Mar. 31, 2013
Contingencies And Commitments [Line Items]
Rental expenses for leased properties	$ 70,500	$ 67,900
Longview, Texas office building
Contingencies And Commitments [Line Items]
Operating lease expiration, date	Apr. 30, 2018
Humble, Texas office building
Contingencies And Commitments [Line Items]
Operating lease expiration, date	Dec. 31, 2016

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

No definition available.

Name:	us-gaap_LeaseAndRentalExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration