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Stock-based Payments | 12 Months Ended
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Apr. 30, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Stock-based Payments | Stock-based Payments Stock-based compensation in the amount of $649,000 and $1.0 million was recognized for years ended April 30, 2019 and 2018, respectively. Included in stock-based compensation expense for the twelve months ended April 30, 2019 and April 30, 2018 under "general and administrative" line item is $13,000 and $15,000, respectively related to the issuance of common stock as compensation for services performed. Additionally, for the twelve months ended April 30, 2018 under "general and administrative" line item is an option modification charge of $56,529. Stock-based compensation costs were recorded as follows (in thousands):
| Year Ended April 30,
| 2019 |  | 2018
General and administrative | $ | 458 |  |  | $ | 689 |
Sales and marketing | 91 |  |  | 112 |
Research and development | 14 |  |  | 166 |
TOS cost of sales | 86 |  |  | 65 |
POS cost of sales | — |  |  | 2 |
Total stock-based compensation expense | $ | 649 |  |  | $ | 1,034 |
2010 Equity Incentive Plan On February 18, 2011, shareholders owning a majority of the issued and outstanding shares of the Company executed a written consent approving the 2010 Equity Incentive Plan (“2010 Equity Plan”). The purpose of the 2010 Equity Plan is to grant (i) Non-statutory Stock Options; (ii) Restricted Stock Awards; and (iii) Stock Appreciation Rights (collectively, stock-based compensation) to its employees, directors and non-employees. Total stock awards under the 2010 Equity Plan shall not exceed 30,000,000 shares of common stock. Options and Stock Appreciation Rights expire no later than ten years from the date of grant and the awards vest as determined by the Board of Directors. Options and Stock Appreciation Rights have a strike price not less than 100% of the fair market value of the common stock subject to the option or right at the date of grant. 2008 Equity Incentive Plan The Company has previously granted (i) Non-statutory Stock Options; (ii) Restricted Stock Awards; and (iii) Stock Appreciation Rights (collectively, stock-based compensation) to its employees, directors and non-employees under a 2008 Equity Incentive Plan (the “2008 Equity Plan”). Such awards may be granted by the Company’s Board of Directors. Options granted under the 2008 Equity Plan expire no later than ten years from the date of grant and the awards vest as determined by the Board of Directors. For stock-based payments to non-employee consultants under both the 2010 and 2008 Equity Plan, the fair value of the stock-based consideration issued is used to measure the transaction, as management believes this to be a more reliable measure of fair value than the services received. The fair value of the award is expensed over the period service is provided to the Company; however, it is ultimately measured at the price of the Company’s common stock or the fair value of stock options using the Black-Scholes valuation model on the date that the commitment for performance by the non-employee consultant has been reached or performance is complete, which is generally the vesting date of the award. Director Compensation Plan On December 12, 2013, the Compensation Committee of the Board of Directors of the Company adopted changes to the Director Compensation Plan of 2010 (the “Director Plan”) effective December 1, 2013. Under the Director Plan, independent directors of the Company are entitled to an annual award of a five-year option to purchase 8,333 shares of the Company’s common stock, and the Chairman of the Board of the Company is entitled to an annual award of a five years option to purchase 16,667 shares of the Company’s common stock. Independent directors who serve as chairperson of a committee will also receive an annual grant of a five-year option to purchase 1,667 shares of the Company’s common stock. All options issued under the Director Plan vest quarterly at a rate of 25%. Option grants will typically be issued after the annual shareholder meeting which will generally be held in October of each year. New directors will receive a grant upon joining the Board equal to the pro-rata annual grant for the remainder of the year. Options issued under the Director Plan are issued pursuant to the 2010 Equity Plan. Stock Option Grants Black-Scholes assumptions used to calculate the fair value of options granted during the years ended April 30, 2019 and 2018 were as follows:
| Year Ended April 30,
| 2019 |  | 2018
Expected term in years | 3 - 6 |  | 3 - 6
Risk-free interest rates | 2.6% - 3.0% |  | 1.8% - 2.6%
Volatility | 65% - 85% |  | 84% - 88%
Dividend yield | —% |  | —%
The weighted average fair value of stock options granted during the years ending April 30, 2019 and 2018, was $6.03 and $2.19, respectively. The Company’s stock options activity and related information as of and for the years ended April 30, 2019 and 2018 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, 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 |
| Non- Employees |  | Directors and Employees |  | Total |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Life (Years) |  | Aggregate Intrinsic Value
Outstanding, May 1, 2017 | 50,000 |  |  | 2,258,704 |  |  | 2,308,704 |  |  | $ | 2.86 |  |  | 6.1 |  | $ | 1,282,000 |
Granted | — |  |  | 455,310 |  |  | 455,310 |  |  | 3.01 |  |  | 9.6 |  | 603,000 |
Exercised | — |  |  | (12,500 | ) |  | (12,500 | ) |  | 3.00 |  |  |  |  |  |
Canceled | — |  |  | — |  |  | — |  |  | — |  |  |  |  |  |
Forfeited | — |  |  | (7,042 | ) |  | (7,042 | ) |  | 6.86 |  |  |  |  |  |
Expired | — |  |  | (38,627 | ) |  | (38,627 | ) |  | 5.21 |  |  |  |  |  |
Outstanding, April 30, 2018 | 50,000 |  |  | 2,655,845 |  |  | 2,705,845 |  |  | 2.85 |  |  | 5.9 |  | $ | 5,265,000 |
Vested and expected to vest as of April 30, 2018 | 50,000 |  |  | 2,655,845 |  |  | 2,705,845 |  |  | 2.85 |  |  | 5.9 |  | $ | 5,265,000 |
Vested as of April 30, 2018 | 25,836 |  |  | 2,436,263 |  |  | 2,462,099 |  |  | 2.79 |  |  | 5.6 |  | $ | 5,036,000 |
On June 30, 2017, the Board of Directors extended the expiration terms of a previous employee's vested grants to November 2018. As a result of this modification, the Company had an additional stock option expense of $56,529, which was expensed under the "General and Administrative" line item on the income statement. On July 21, 2016, the Company and certain members of its senior management team agreed to exchange existing options to purchase shares of the Company's common stock with new options. The new options have a lower exercise price for fewer shares and have the same vesting schedules and the same termination expiration dates as the existing options. The Company used the Black Scholes valuation method to determine if the modification created additional stock option expense. As a result of the option exchange, an aggregate of 1,793,781 existing options with exercise prices ranging from $4.55 to $6.96 per share were exchanged for an aggregate of 1,568,191 new options with exercise prices of $2.10 per share. Stock Purchase Warrants As of April 30, 2019, the Company had warrants outstanding for the purchase of 1,671,440 shares of its common stock, all of which were exercisable. Activity related to these warrants, which expire in March 2020, is summarized as follows:
| 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 |
| Number of Shares |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Life (Years) |  | Aggregate Intrinsic Value
Outstanding, May 1, 2017 | 2,004,284 |  |  | $ | 5.57 |  |  | 2.8 |  |  | $ | — |
Granted | — |  |  | — |  |  | — |  |  | — |
Exercised | — |  |  | — |  |  | — |  |  | — |
Forfeited | — |  |  | — |  |  | — |  |  | — |
Expired | — |  |  | — |  |  | — |  |  | — |
Outstanding, April 30, 2018 | 2,004,284 |  |  | $ | 5.57 |  |  | 1.8 |  |  | $ | — |

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -URI http://asc.fasb.org/subtopic&trid=2208855 + Details
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