CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
	Apr. 30, 2014	Apr. 30, 2013
Cash flows from operating activities:
Net income (loss) for the year	$ (5,914,547)	$ 472,280
Adjustments to reconcile net loss to net cash used in operating activities:
Amortization of intangible assets	0	39,003
Deferred lease inducements	(28,936)	0
Depreciation and amortization	236,443	187,023
Fair value adjustment on derivative instruments	(83,227)	(1,785,773)
Foreign exchange loss	735,856	(2,539)
Stock-based compensation	1,071,467	1,008,004
Changes in assets and liabilities:
Accounts payable and accrued liabilities	49,954	(10,163)
Accounts receivable	1,235,500	(627,326)
Accrued warranty	(21,992)	6,203
Customer deposits	0	(4,319)
Prepaid expenses and deposits	(22,388)	30,853
Other assets	(20,468)	(52,049)
Unearned revenue	183,315	134,337
Unrecognized tax benefit	(72,944)	0
Net cash used in operating activities	(2,651,967)	(604,466)
Cash flows from investing activities:
Purchase of equipment	(237,515)	(254,699)
Deposits	0	(41,856)
Net cash used in investing activities	(237,515)	(296,555)
Cash flows from financing activities:
Common stock issued	1,374	3,994,598
Common stock repurchased	(268,112)	0
Redemption of deferred share units	(84,627)	0
Transaction costs	0	(15,592)
Net cash (used in) provided by financing activities	(351,365)	3,979,006
Foreign exchange effect on cash	(815,950)	(2,529)
Increase (decrease) in cash	(4,056,797)	3,075,456
Cash, beginning of the year	11,229,595	8,154,139
Cash, end of the year	7,172,798	11,229,595
Supplemental disclosure of cash flow information Cash paid for:
Interest	1,732	1,135
Taxes	$ 15,736	$ 0