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Stock-based Payments (Tables)

12 Months Ended

Apr. 30, 2020

Share-based Payment Arrangement [Abstract]

Schedule of Employee Service Stock-based Compensation, Allocation of Recognized Period Costs

Stock-based compensation costs were recorded as follows (in thousands):

	Year Ended April 30,
	2020				2019
General and administrative	$	328			$	458
Sales and marketing	237				91
Research and development	13				14
TOS cost of sales	21				86
POS cost of sales	1				—
Total stock-based compensation expense	$	600			$	649

Schedule of Stock-based Payment Award, Stock Options, Valuation Assumptions

Black-Scholes assumptions used to calculate the fair value of options granted during the years ended April 30, 2020 and 2019 were as follows:

	Year Ended April 30,
	2020		2019
Expected term in years	3 - 6		3 - 6
Risk-free interest rates	1.3% - 1.8%		2.6% - 3.0%
Volatility	69% - 71%		65% - 85%
Dividend yield	—%		—%

Schedule of Stock-based Compensation, Stock Options, Activity

The Company’s stock options activity and related information as of and for the years ended April 30, 2020 and 2019 is as follows:

	Non- Employees			Directors and Employees			Total			Weighted Average Exercise Price				Weighted Average Remaining Contractual Life (Years)		Aggregate Intrinsic Value
Outstanding, May 1, 2019	50,000			2,373,626			2,423,626			$	3.19			5.3		$	14,557,000
Granted	—			229,833			229,833			5.33				8.1		$	544,000
Exercised	—			(248,495	)		(248,495	)		2.31
Canceled	—			(11,824	)		(11,824	)		7.96
Forfeited	—			(44,813	)		(44,813	)		7.85
Expired	(6,668	)		(70,001	)		(76,669	)		8.04
Outstanding, April 30, 2020	43,332			2,228,326			2,271,658			3.23				5.0		$	10,663,000
Vested and expected to vest as of April 30, 2020	43,332			2,228,326			2,271,658			3.23				5.0		$	10,663,000
Vested as of April 30, 2020	17,501			1,926,117			1,943,618			2.83				4.5		$	9,898,000

	Non- Employees			Directors and Employees			Total			Weighted Average Exercise Price				Weighted Average Remaining Contractual Life (Years)		Aggregate Intrinsic Value
Outstanding, May 1, 2018	50,000			2,655,845			2,705,845			$	2.85			5.9		$	5,265,000
Granted	—			206,790			206,790			9.86				7.9		77,000
Exercised	—			(363,383	)		(363,383	)		2.22
Canceled	—			(49,766	)		(49,766	)		3.20
Forfeited	—			(9,750	)		(9,750	)		3.50
Expired	—			(66,110	)		(66,110	)		15.10
Outstanding, April 30, 2019	50,000			2,373,626			2,423,626			3.19				5.3		$	14,557,000
Vested and expected to vest as of April 30, 2019	50,000			2,373,626			2,423,626			3.19				5.3		$	14,557,000
Vested as of April 30, 2019	18,335			2,115,585			2,133,920			2.70				4.9		$	13,785,000

Schedule Of Stock-based Compensation Warrants Activity

Activity related to warrants is summarized in the following table. Approximately 161,000 shares noted as exercised below were done so via a cash-less exercise basis.

	Number of Shares			Weighted Average Exercise Price				Weighted Average Remaining Contractual Life (Years)			Aggregate Intrinsic Value
Outstanding, May 1, 2019	1,671,440			$	6.20			0.9			$	5,730,000
Granted	—			—				—			—
Exercised	(858,695	)		5.62				—			10,045,000
Forfeited	(760,601	)		5.76				—			8,587,000
Expired	(52,144	)		4.85				—			700,000
Outstanding, April 30, 2020	—			$	—			—			$	—

	Number of Shares			Weighted Average Exercise Price				Weighted Average Remaining Contractual Life (Years)			Aggregate Intrinsic Value
Outstanding, May 1, 2018	2,004,284			$	5.57			1.8			$	—
Granted	—			—				—			—
Exercised	(247,468	)		5.28				—			905,000
Forfeited	(85,376	)		4.80				—			388,000
Expired	—			—				—			—
Outstanding, April 30, 2019	1,671,440			$	6.20			0.9			$	5,730,000

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- Definition

Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for warrants that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

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Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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