Business Segment Information (Details) (USD $)	3 Months Ended				6 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014 Customer Segment		Sep. 30, 2013 Customer		Mar. 31, 2014
Business Segment Information [Abstract]
Number of operating segments					1
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue by customer (in hundredths)	24.00%		25.00%		27.00%		26.00%
Revenues	$ 6,455,000		$ 5,977,000		$ 12,839,000		$ 11,818,000
Long-lived assets	953,000				953,000				998,000
Number of major customers					0		0
Percentage of sales considered for major customer (in hundredths)					0.00%		0.00%
United States [Member] | Reportable Geographical Components [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	4,896,000		4,478,000		9,429,000		8,763,000
Long-lived assets	385,000				385,000				379,000
United Kingdom [Member] | Reportable Geographical Components [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	627,000		575,000		1,287,000		1,122,000
All Other Foreign Countries [Member] | Reportable Geographical Components [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	932,000	[1]	924,000	[1]	2,123,000	[1]	1,933,000	[1]
Long-lived assets	$ 568,000	[2]			$ 568,000	[2]			$ 619,000	[2]

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

[2] Substantially all maintained in The Netherlands.