Unaudited Consolidated Statements of Operations - USD ($) shares in Thousands	3 Months Ended
	Jul. 31, 2017	Jul. 31, 2016
Revenues	$ 195,000	$ 202,000
Cost of revenues	217,000	127,000
Gross profit (loss)	(22,000)	75,000
Operating expenses:
Product development costs	1,102,000	1,636,000
Selling, general and administrative costs	1,641,000	1,519,000
Total operating expenses	2,743,000	3,155,000
Operating loss	(2,765,000)	(3,080,000)
Change in fair value of warrant liabilities	37,000	(752,000)
Interest income, net	3,000
Foreign exchange gain	62,000	5,000
Net loss	$ (2,663,000)	$ (3,827,000)
Basic and diluted net loss per share (in dollars per share)	$ (0.22)	$ (1.72)
Weighted average shares used to compute basic and diluted net loss per share (in shares)	12,268,683	2,228,585