Business Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2013 Segment		Dec. 31, 2012		Mar. 31, 2013
Business Segment Information [Abstract]
Number of operating segments					1
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue by customer (in hundredths)	26.00%		27.00%		26.00%		27.00%
Revenues	$ 6,399		$ 5,590		$ 18,216		$ 16,877
Long-lived assets	1,052				1,052				1,033
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	4,753		4,105		13,516		12,384
Long-lived assets	426				426				434
All Other Foreign Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	1,646	[1]	1,485	[1]	4,700	[1]	4,493	[1]
Long-lived assets	$ 626	[2]			$ 626	[2]			$ 599	[2]

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

[2] Substantially all maintained in The Netherlands.