Financial Information by Geographic Location (Tables)

6 Months Ended

Oct. 31, 2015

Segment Reporting [Abstract]

Revenue by geographic location

	Three months ended October 31, 2015		Six months ended October 31, 2015
	Approximate ($)		Approximate ($)
United States	$	5,108,000	$	11,220,000
Europe		879,000		1,995,000
Other (principally Asia Pacific Region)		64,000		173,000
Consolidated	$	6,051,000	$	13,388,000

	Three months ended October 31, 2014		Six months ended October 31, 2014
	Approximate ($)		Approximate ($)
United States	$	5,699,000	$	12,330,000
Europe		1,059,000		1,998,000
Other (principally Asia Pacific Region)		122,000		277,000
Consolidated	$	6,880,000	$	14,605,000