Common Stock (Tables)

3 Months Ended

Jul. 31, 2019

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	Three Months Ended
	July 31, 2018
Risk-free interest rate	2.86%
Expected volatility	76.3%
Expected term	3.7 years
Dividend yield	0%

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

	Weighted Average
	Number of			Exercise Price
	Options			per Share
Outstanding at April 30, 2019	616,449		$	2.27
Granted	–		$	–
Forfeited/Cancelled	(22,396	)	$	2.16
Expired	(39,500	)	$	2.50
Exercised	–		$	–
Outstanding at July 31, 2019	554,553		$	2.25
Exercisable at July 31, 2019	212,397		$	2.61
Exercisable at April 30, 2019	239,551		$	2.58

Schedule of Employee and Non-Employee Service Share-based Compensation Allocation of Recognized Period Costs [Table Text Block]

		Three Months Ended
		July 31,
		2019		2018
Cost of sales	$	11,220	$	14,569
Sales and marketing		15,724		22,482
Research and development		10,303		15,031
General and administrative		10,768		26,648
Total stock-option based compensation	$	48,015	$	78,730

Schedule of Stockholders Equity Deferred Share Unit Plan [Table Text Block]

			Weighted
			Average Grant
			Date Fair
	Number of DSUs		Value Per DSU
DSUs outstanding at April 30, 2019	633,491	$	5.20
Granted	−	$	−
Cancelled	−	$	−
DSUs outstanding at July 31, 2019	633,491	$	5.20

Schedule of Allocation of Share Based Compensation Costs for Deferred Share Units [Table Text Block]

		Three Months Ended
		July 31,
		2019		2018
Cost of sales	$	1,175	$	−
Sales and marketing		4,700		−
Research and development		1,175		−
General and administrative		13,276		188,682
	$	20,326	$	188,682