5. SHAREHOLDERS' EQUITY

On February 24, 2020, the Company filed with the Secretary of State of Delaware a certificate of designation to authorize for issuance 571,429 shares of Series A 5% Convertible Preferred Stock. On February 26, 2020, the Company filed with the Secretary of State of Delaware a certificate of correction, correcting certain language defects in the previously filed certificate of designation. Please see below a description of the Series A 5% Convertible Preferred Stock shares that were issued in February 2020.

STOCK OPTION AND RESTRICTED STOCK PLANS

In August 2010, the Company adopted a stock option and restricted stock plan (the "2010 Plan") which provides that non-qualified options and incentive stock options and restricted stock covering an aggregate of 850,000 shares of the Company's unissued common stock may be granted to affiliates, employees or consultants of the Company. This plan was approved by shareholders in December 2010. The 2010 Plan expires in December 2020. Options granted under the 2010 Plan will be granted at prices not less than 80% of the then fair market value of the common stock and will expire not more than 10 years after the date of grant.

In December 2014, the Company adopted a stock option and restricted stock plan (the "2014 Plan") which provides that non-qualified options and incentive stock options and restricted stock covering an aggregate of 850,000 shares of the Company's unissued common stock may be granted to affiliates, employees or consultants of the Company. This plan was approved by shareholders in December 2014. The 2014 Plan expires in December 2024. Options granted under the 2014 Plan will be granted at prices not less than 80% of the then fair market value of the common stock and will expire not more than 10 years after the date of grant.

In December 2017, the Company adopted a stock option and restricted stock plan (the “2017 Plan”) which provides that non-qualified options and incentive stock options and restricted stock covering an aggregate of 900,000 shares of the Company’s unissued common stock may be granted to affiliates, employees or consultants of the Company. This plan was approved by shareholders in December 2017. The 2017 Plan expires in December 2027. Options granted under the 2017 Plan will be granted at prices not less than 80% of the then fair market value of the common stock and will expire not more than 10 years after the date of grant.

In February 2020, the Board approved the 2020 Stock Incentive Plan (the “2020 Plan”), which will be presented to the Company’s shareholders for final approval and adoption at the Company’s annual meeting to be held in December 2020. The 2020 Plan authorizes the issuance of an aggregate number of common stock options and/or restricted common shares to be issued in an amount not to exceed 900,000. The 2020 Plan authorizes the issuance of common stock options and restricted common shares to employees, directors and consultants of the Company. During fiscal 2020, certain common stock options were granted under this plan, the actual vesting of which is subject to the plan being approved and adopted by shareholders at our upcoming annual meeting of shareholders.

Stock option expense during fiscal 2020 was $200,470. This included, by department, $17,892 for research and development, $156,750 in administrative, $2,933 in sales and marketing, $22,895 for production and $0 in Mexico. In fiscal 2019, stock option expense was $151,224. This included $3,714 in research and development, $143,299 in administrative, $4,163 in sales and marketing and $48 in Mexico.

Activity as to aggregate stock options outstanding is as follows:

	NUMBER OF STOCK OPTIONS	EXERCISE PRICE RANGE PER SHARE	WEIGHTED AVERAGE EXERCISE PRICE
Options outstanding at May 31, 2018	1,138,625	$0.71-$3.90	$	1.65
Options granted	558,000	$2.25-$3.62	$	2.60
Options exercised	(163,500)	$0.71-$1.04	$	0.76
Options canceled or expired	(56,916)	$0.71-$3.62	$	2.49
Options outstanding at May 31, 2019	1,476,209	$0.82-$3.90	$	2.07
Options granted	517,500	$2.68-$8.18	$	4.47
Options exercised	(137,958)	$0.82-$3.90	$	1.64
Options canceled or expired	(66,500)	$0.85-$8.18	$	3.43
Options outstanding at May 31, 2020	1,789,251	$0.82-$8.18	$	2.75

The weighted average fair value of options granted during 2020 and 2019 was $4.47 and $2.60, respectively. The aggregate intrinsic value of options exercised during 2020 and 2019 was approximately $589,000 and $364,000, respectively. The aggregate intrinsic value of options outstanding at May 31, 2020 and 2019 was approximately $6,923,000 and $808,000, respectively. The aggregate intrinsic value of options vested and exercisable at May 31, 2020 and 2019 was approximately $4,442,000 and $685,000, respectively.

Number of non-vested stock options included in table above is as follows:

	NUMBER OF SHARES	STOCK OPTIONS WEIGHTED AVERAGE AVERAGE GRANT DATE FAIR VALUE
Non-vested shares at May 31, 2019	769,584	$	2.49
Granted	517,500	$	4.47
Vested	(407,750)	$	2.25
Forfeited	(56,750)	$	3.55
Non-vested shares at May 31, 2020	822,584	$	3.78

At May 31, 2020, total compensation cost related to non-vested stock option awards not yet recognized totaled approximately $663,000. The weighted-average period over which this amount is expected to be recognized is 3.67 years. The weighted average remaining contractual term of options that were exercisable at May 31, 2020 was 6.19 years.

The following summarizes information about all of the Company's stock options outstanding at May 31, 2020. These options are comprised of those granted under the 2010, 2014, 2017 and 2020 plans.

RANGE OF EXERCISE PRICES	NUMBER OUTSTANDING May 31, 2020	WEIGHTED AVERAGE REMAINING CONTRACTUAL LIFE IN YEARS	WEIGHTED AVERAGE EXERCISE PRICE	NUMBER EXERCISABLE AT MAY 31, 2020	WEIGHTED AVERAGE EXERCISE PRICE
$ 0.82-$1.04	276,000	4.44	$0.84	276,000	$0.84
$ 1.20-$ 2.81	1,072,500	7.57	$2.17	506,000	$1.71
$ 3.62-$ 8.18	440,751	7.62	$5.38	184,667	$3.87

COMMON STOCK ACTIVITY

During the year ended May 31, 2020, options to purchase 137,958 shares of common stock were exercised at prices ranging from $0.82 to $3.90. Total net proceeds to the Company were $223,534.

During the year ended May 31, 2019, options to purchase 163,500 shares of common stock were exercised at prices ranging from $0.71 to $1.04. Total net proceeds to the Company were $121,790.

On December 1, 2017, the Company entered into an At Market Issuance Sales Agreement (or “ATM Agreement”) with an agent, and filed a prospectus supplement with the SEC pursuant to which the Company could offer and sell from time to time up to an aggregate of $7,000,000 of shares of the Company’s common stock, par value $0.08 per share (the “Placement Shares”), through the agent. From December 1, 2017 to March 19, 2020, the Company sold common stock resulting in $6,997,935 of gross proceeds under this ATM Agreement, of which $3,771,048 were sold during the year ended May 31, 2020. This At Market Issuance Agreement expired on July 20, 2020 upon the expiration of the Company’s S-3 registration statement base prospectus dated July 20, 2017.

The Placement Shares sold and issued under the ATM Agreement have been registered under the Securities Act of 1933, as amended (the “Securities Act”), pursuant to the Registration Statement on Form S-3 (File No. 333-219130) (the “Registration Statement”), which was originally filed with the SEC on June 30, 2017 and declared effective by the SEC on July 20, 2017, the base prospectus contained within the Registration Statement, and the prospectus supplement related to the sale of shares under the ATM Agreement was filed with the SEC on December 1, 2017.

On March 20, 2020, the Company filed a new prospectus supplement to the S-3 registration statement base prospectus dated July 20, 2017 for purposes of raising up to $12,500,000 from time to time pursuant to the terms of the ATM Agreement. This ATM Agreement expired on July 20, 2020 upon the expiration of the Company’s S-3 registration statement base prospectus dated July 20, 2017. Gross proceeds for the year ended May 31, 2020, were $6,817,330.

Please refer to “Subsequent Events” for a description of the Form S-3 filed with the Securities and Exchange Commission on July 20, 2020.

Combined Placement Shares sold under the ATM during the twelve months ended May 31, 2020 under the two prospectus supplements dated December 1, 2017 and March 20, 2020 totaled 1,674,943 shares. Total net proceeds from the sale of Placement Shares under the two prospectus supplements during the twelve months ended May 31, 2020 were $10,232,857 after deducting commissions for each sale and legal, accounting, and other fees related to the filing of the Form S-3. These shares were sold at prices ranging from $2.33 to $9.08 per share.

Under an ATM Agreement, sales of the Placement Shares are deemed to be “at the market offering” as defined in Rule 415 promulgated under the Securities Act. The agent acts as sales agent under the ATM and uses commercially reasonable efforts to sell on the Company’s behalf all of the Placement Shares requested to be sold from time to time by the Company, consistent with its normal trading and sales practices, on mutually agreed terms between the agent and the Company.

The Company has no obligation to sell any of the Placement Shares under the ATM Agreement, and may at any time suspend offers under, or terminate the ATM Agreement.

During the year ended May 31, 2020, 250,000 shares of common stock were converted from Preferred Stock as described below in “Preferred Stock Activity”.

During the year ended May 31, 2020, the Company sold 1,674,943 shares of its common stock at prices ranging from $2.33 to $9.08 under its S-3 Registration Statement which resulted in gross proceeds of $10,588,378 and net proceeds to the Company of $10,232,857 after deducting commissions for each sale and legal, accounting and other fees related to the filing of the Form S-3.

During the year ended May 31, 2019, the Company sold 625,677 shares of its common stock at prices ranging from $2.59 to $4.16 under its S-3 Registration Statement which resulted in gross proceeds of $1,847,662 and net proceeds to the Company of $1,776,575 after deducting commissions for each sale and legal, accounting and other fees related to the filing of the Form S-3.

PREFERRED STOCK ACTIVITY

On February 24, 2020, the Company entered into and closed on a Stock Purchase Agreement (the “Stock Purchase Agreement”) with Palm Global Small Cap Master Fund LP (“Palm”) pursuant to which the Company agreed to sell and issue to Palm, and Palm agreed to purchase from the Company, 571,429 shares of the Company’s Series A 5% Convertible Preferred Stock, $0.08 par value per share for a purchase price of approximately $2 million, or $3.50 per Series A Convertible Preferred Stock. Under the terms of the Stock Purchase Agreement, each share of issued Convertible Preferred Stock can be converted at any time by Palm into one share of the Company’s common stock, subject to certain adjustments.

The Series A 5% Convertible Preferred Stock shares are convertible at the option of the holder at any time into an equal number of common stock shares (“Conversion Shares”). The conversion price may be adjusted for stock splits or other common stock issuances. The Company may require the conversion of all of the outstanding Series A 5% Convertible Preferred Stock shares if the closing sale price of the Company’s common stock equals or exceeds $9.00 for a period of five consecutive trading days with a minimum average trading volume of 35,000 shares per day over such period; provided, that, on such date, the Conversion Shares are registered for resale.

The Series A 5% Convertible Preferred Stock shares accrue annual preferred dividends at a rate of $0.175 per Series A 5% Convertible Preferred Stock share. The shares of Series A 5% Convertible Preferred Stock are also entitled to receive participating dividends. The shares of Series A 5% Convertible Preferred Stock have no voting rights. Accruing dividends are payable only when, as, and if declared by the Board and the Company has no obligation to pay such accruing dividends. As such, since the dividend payment is conditional on events that are deemed unlikely at this time, a liability has not been recorded at year-end for these dividends. Dividends that have accumulated through May 31, 2020 total approximately $18,000.

The 5% dividend is a cumulative dividend, and is only payable if the Board elects to pay a dividend on the Company’s common shares, at which point the accrued cumulative dividend must be paid current. At the conversion of any preferred shares into common shares, all accrued, unpaid dividends on the converted preferred shares are canceled and forgiven by Palm. As part of the purchase, Palm was given the right to appoint a Board Observer to the Board. The preferred shares have many material preferential rights over common shareholders in the event of a filing for bankruptcy or dissolution of the Company. For further details on the rights of these preferred shares, please refer to the Company’s disclosures filed under an SEC 8-K on February 26, 2020.

On March 24, 2020, Palm converted 250,000 shares of Convertible Preferred Stock into 250,000 shares of unregistered common stock. On July 21, 2020, the Company filed with the SEC a registration statement on Form S-3 that among other things registered all of the common shares issued, or to be issued, to Palm upon conversion of the Convertible Preferred Stock into common shares. The Company anticipates the registration statement shall become effective promptly following the filing of this annual report on Form 10-K with the SEC. The Company incurred approximately $82,000 in issuance costs associated with this stock issuance.