CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	3 Months Ended
	Jul. 31, 2015	Jul. 31, 2014
Cash flows from operating activities:
Net loss for the period	$ (1,111,105)	$ (1,063,373)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	73,778	67,510
Stock-based compensation	361,522	368,612
Fair value adjustment on derivative instruments	39,615	0
Foreign exchange gain	(154,365)	(348,247)
Changes in assets and liabilities:
Accounts receivable	237,248	518,036
Prepaid expenses and deposits	52,762	(5,179)
Other assets	0	(11,286)
Accounts payable and accrued liabilities	(338,463)	113,223
Unearned revenue	243,055	63,916
Deferred lease inducements	(6,032)	59,778
Accrued warranty	(7,297)	3,459
Customer deposits	8,070	0
Net cash used in operating activities	(601,212)	(233,551)
Cash flows from investing activities:
Purchase of equipment	(7,847)	(73,699)
Net cash used in investing activities	(7,847)	(73,699)
Cash flows from financing activities:
Common stock issued	36,378	2
Common stock repurchased	(17,896)	(55,673)
Net cash provided by (used in) financing activities	18,482	(55,671)
Foreign exchange effect on cash	(47,224)	42,140
Net decrease in cash	(637,801)	(320,781)
Cash, beginning of the period	2,852,422	7,172,798
Cash, end of the period	2,214,621	6,852,017
Supplemental disclosure of cash flow information Cash paid for:
Interest	1,631	355
Income taxes paid	$ 0	$ 0