INTERIM CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)	3 Months Ended
Jul. 31, 2019	Jul. 31, 2018
Cash flows used in operating activities:
Net loss for the period	$ (929,723)	$ (1,010,947)
Adjustments to reconcile net loss to net cash used in operating activities:
Bad debt expense	39,321	90,249
Deferred lease inducements	(4,118)	(2,494)
Depreciation and amortization	19,982	28,942
Operating lease expense	138,277
Unrealized foreign exchange (gain) loss	176,916	(120,744)
Stock-based compensation	68,341	267,412
Change in fair value of derivative instruments	(643)	(5,402)
Changes in assets and liabilities:
Accounts payable and accrued liabilities	(172,266)	66,822
Accounts receivable	165,235	215,587
Deferred sales commission costs	(12,820)	(23,982)
Prepaid expenses and other current assets	50,441	29,085
Accrued warranty	(3,462)	(3,291)
Operating lease liabilities	(127,420)
Unearned revenue	(40,216)	(6,944)
Other current liabilities	1,647
Net cash used in operating activities	(630,508)	(475,707)
Cash flows used in investing activities:
Purchases of equipment	(17,140)	(3,911)
Purchases of intangibles	(2,713)	(265)
Net cash used in investing activities	(19,853)	(4,176)
Cash flows provided by financing activities:
Net proceeds from issuance of common stock	5,263	2,944
Net cash provided by financing activities	5,263	2,944
Foreign exchange effect on cash	6,593	5,219
Decrease in cash	(638,505)	(471,720)
Cash, beginning of the period	1,862,458	2,348,883
Cash, end of the period	1,223,953	1,877,163
Cash paid for:
Interest	40,110	5
Taxes	$ 0	$ 0

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Cash paid for Abstract

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The Noncash portion of Amount of increase (decrease) in the fair value of derivatives recognized.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount before tax of foreign currency transaction unrealized gain (loss) recognized in the income statement.

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The increase (decrease) during the reporting period in the amounts payable to vendors for goods and services received and the amount of obligations and expenses incurred but not paid.

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The increase (decrease) during the reporting period, excluding the portion taken into income, in the liability reflecting revenue yet to be earned for which cash or other forms of consideration was received or recorded as a receivable.

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The increase (decrease) during the reporting period in the aggregate amount of liabilities that result from activities that generate operating income.

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Amount of increase (decrease) in current liabilities classified as other.

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The increase (decrease) during the reporting period in the amount of outstanding money paid in advance for goods or services that bring economic benefits for future periods.

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Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.

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Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.

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Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.

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The cash outflow for acquisition of machinery and equipment.

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