Business Segment Information (Details) (USD $)	3 Months Ended				9 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2014 Customer Segment		Dec. 31, 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%		26.00%		26.00%		26.00%
Revenues	$ 6,667,000		$ 6,399,000		$ 19,506,000		$ 18,216,000
Long-lived assets	947,000				947,000				998,000
Number of major customers					0		0
Percentage of sales considered for major customer (in hundredths)					10.00%		10.00%
United States [Member] | Reportable Geographical Components [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	5,083,000		4,753,000		14,512,000		13,516,000
Long-lived assets	409,000				409,000				379,000
United Kingdom [Member] | Reportable Geographical Components [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	636,000		591,000		1,923,000		1,713,000
All Other Foreign Countries [Member] | Reportable Geographical Components [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	948,000	[1]	1,055,000	[1]	3,071,000	[1]	2,987,000	[1]
Long-lived assets	$ 538,000	[2]			$ 538,000	[2]			$ 619,000	[2]

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

[2] Substantially all maintained in The Netherlands.