Business Segment Information (Details) (USD $)	12 Months Ended
	Mar. 31, 2013 Customer Segment		Mar. 31, 2012 Customer		Mar. 31, 2011 Customer
Business Segment Information [Abstract]
Number of operating segments	1
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 22,418,000		$ 20,562,000		$ 13,787,000
Long-lived assets	1,033,000		1,172,000
Number of major customers	0		0		0
Percentage of sales considered for major customer (in hundredths)	10.00%		10.00%		10.00%
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	16,401,000		13,854,000		7,908,000
Long-lived assets	434,000		509,000
United Kingdom [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	2,189,000		1,929,000		1,481,000
Long-lived assets	5,000		17,000
The Netherlands [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	594,000		646,000
All Other Foreign Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 3,828,000	[1]	$ 4,779,000	[1]	$ 4,398,000	[1]

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