Commitments and Contingencies (Details)	12 Months Ended
	Mar. 31, 2014 USD ($)	Mar. 31, 2014 GBP (£)	Mar. 31, 2013 USD ($)	Mar. 31, 2012 USD ($)
Royalties [Abstract]
Royalty paid per unit sold		£ 10
Percentage of royalties paid on the net sales of certain products (in hundredths)	5.00%	5.00%
Minimum royalties paid periodically	4,500
Royalty expense	353,000		353,000	383,000
Purchase Requirements [Abstract]
Purchase commitments within next twelve months	283,000
Future minimum lease payments in subsequent fiscal years under noncancelable operating leases [Abstract]
2015	252,000
2016	225,000
2017	184,000
2018	175,000
2019	168,000
Thereafter	42,000
Total future minimum lease payments	1,046,000
Total operating lease expenses	294,000		252,000	271,000
Product Liability [Abstract]
Product liability insurance coverage	$ 10,000,000