Business Segment Information (Details) (USD $)	3 Months Ended				9 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2012		Dec. 31, 2011
Business Segment Information [Abstract]
Number of operating segments					1
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue by customer (in hundredths)	27.00%		33.00%		27.00%		34.00%
Revenues	$ 5,590,000		$ 5,344,000		$ 16,877,000		$ 14,965,000
Long-lived assets	1,075,000				1,075,000
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	4,105,000		3,576,000		12,384,000		9,900,000
Long-lived assets	445,000				445,000
All Other Foreign Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	1,485,000	[1]	1,768,000	[1]	4,493,000	[1]	5,065,000	[1]
Long-lived assets	$ 630,000				$ 630,000

[1] No country accounts for 10% or more of the consolidated net sales