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Note 8 - Stockholders' Equity | 12 Months Ended
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Jun. 30, 2022
Notes to Financial Statements |
Stockholders' Equity Note Disclosure [Text Block] | (8) Stockholders’ Equity Offerings of Common Stock On October 21, 2020, the Company entered into a securities purchase agreement with certain purchasers named therein, pursuant to which the Company agreed to issue and sell 7,826,086 shares (the “Public Offering Shares”) of the Company’s common stock, par value $0.001 per share (the “Common Stock”), at an offering price of $2.30 per share (the “Public Offering”). The Public Offering resulted in gross proceeds of approximately $18.0 million before deducting the placement agent’s fees and related offering expenses. Pursuant to an engagement agreement dated July 23, 2020, as amended, the Company engaged H.C. Wainwright & Co., LLC (the “Placement Agent”) to act as the Company’s exclusive placement agent in connection with the Public Offering. The Company issued to the Placement Agent, or its designees, warrants (the “Placement Agent’s Warrants No. 1”) to purchase up to 469,565 shares of Common Stock, which represents 6.0% of the Public Offering Shares sold in the Public Offering. The Placement Agent’s Warrants No. 1 have an exercise price of $2.875 per share, which represents 125% of the per share offering price of the Public Offering Shares, and a termination date of October 21, 2025. The Placement Agent’s Warrants No. 1 had a fair value per share of $2.01 as of the date of issuance. On October 28, 2020, the Company entered into a securities purchase agreement with certain purchasers named therein, pursuant to which the Company agreed to issue and sell, in a registered direct offering (the “October Registered Offering”), 2,887,906 shares (the “October Registered Offering Shares”) of the Company’s Common Stock, at an offering price of $2.15 per share. The October Registered Offering resulted in gross proceeds of approximately $6.2 million before deducting the placement agent’s fees and related offering expenses. Pursuant to an engagement agreement dated July 23, 2020, as amended, the Company engaged the Placement Agent to act as the Company’s exclusive placement agent in connection with the October Registered Offering. The Company also issued to the Placement Agent, or its designees, warrants (the “Placement Agent’s Warrants No. 2”) to purchase up to 173,274 shares of Common Stock, which represents 6.0% of the October Registered Offering Shares sold in the October Registered Offering. The Placement Agent’s Warrants No. 2 have an exercise price of $2.6875 per share, which represents 125% of the per share offering price of the October Registered Offering Shares, and a termination date of October 28, 2025. The Placement Agent’s Warrants No. 2 had a fair value per share of $1.80 as of the date of issuance. On February 11, 2021, the Company entered into a securities purchase agreement with certain purchasers named therein, pursuant to which the Company agreed to issue and sell, in a registered direct offering (the “February Registered Offering”), 2,845,535 shares (the “February Registered Offering Shares”) of the Company’s Common Stock, par value $0.001 per share, at an offering price of $3.25 per share. The February Registered Offering resulted in gross proceeds of approximately $9.25 million before deducting the placement agent’s fees and related offering expenses. Pursuant to an engagement agreement, dated July 23, 2020, as amended, the Company engaged the Placement Agent to act as the Company’s exclusive placement agent in connection with the February Registered Offering. The Company has issued to the Placement Agent, or its designees, warrants (the “Placement Agent’s Warrants No. 3”) to purchase up to 170,732 shares of Common Stock, which represents 6.0% of the February Registered Offering Shares sold in the February Registered Offering. The Placement Agent’s Warrants No. 3 have an exercise price of $4.0625 per share, which represents 125% of the per share offering price of the February Registered Offering Shares and a termination date of February 11, 2026. The Placement Agent’s Warrants had a fair value per share of $2.94 as of the date of issuance. On April 7, 2021, the Company entered into an amended and restated underwriting agreement (the “Underwriting Agreement”) with H.C. Wainwright & Co., LLC (the “Underwriter”) to issue and sell, in an underwritten, firm-commitment public offering (the “Offering”), 21,639,851 shares of the Company’s Common Stock. The offering price to the public in the Offering was $1.50 per share of Common Stock and the Underwriter agreed to purchase the shares from the Company pursuant to the Underwriting Agreement at a price of $1.395 per share, representing an underwriting discount of seven percent (7.0%). Pursuant to the Underwriting Agreement, the Company also granted the Underwriter an option to purchase, for a period of 30 days from the date of the Underwriting Agreement, up to an additional 3,245,977 shares of Common Stock. On April 12, 2021, the Underwriter exercised the option in full. The Offering resulted in aggregate gross proceeds, including the option exercise, of approximately $37.3 million, before deducting underwriting discounts and commissions and estimated offering expenses. Pursuant to the Underwriting Agreement, the Company issued warrants (the “Underwriter Warrants”) to the Underwriter (in its capacity as the underwriter of the Offering) or its designees to purchase shares of Common Stock in an amount equal to 6.0% of the aggregate number of shares sold in the Offering, or 1,493,150 shares of Common Stock in the aggregate, at an exercise price of $1.875 per share. The Underwriter Warrants will expire on April 7, 2026. At-the-Market Agreements On December 18, 2020, the Company entered into an at-the-market offering agreement (the “Wainwright ATM Agreement”) with H.C. Wainwright & Co., LLC as agent, pursuant to which the Company may offer and sell, from time to time through H.C. Wainwright, shares of the Company’s Common Stock, having an aggregate offering price of up to $3,582,614. During the second quarter of fiscal 2021, the Company sold 1,139,323 shares of Common Stock pursuant to the Wainwright ATM Agreement. In connection with the sales of these shares of Common Stock, the Company received gross proceeds of approximately $3.6 million. The weighted-average sale price per shares was $3.14. Preferred Stock The Company has issued 280,898 shares of Series D convertible preferred stock (“Series D Preferred Shares”), all of which were issued and outstanding as of June 30, 2022. Series D Preferred Shares are convertible to common stock on a one-to-one basis. Series D Preferred Shares are not callable by the Company. The holder of the preferred stock is entitled to receive, and we shall pay, dividends on shares equal to and in the same form as dividends actually paid on shares of common stock when, and if, such dividends are paid on shares of common stock. No other dividends are paid on the preferred shares. Preferred shares have no voting rights. Upon liquidation, dissolution, or winding-up of the Company, whether voluntary or involuntary, the preferred shares have preference over common stock. The holder of Series D Preferred Shares has the option to convert said shares to common stock at the holder’s discretion. Warrants A summary of the common stock warrant activity for the year ended June 30, 2022 is presented below:
|  | Shares |  |  | Weighted Average Exercise |  |  | Aggregate Fair Market Value at Issuance |  |  | Weighted Average Remaining Contractual Life |
|  | (In thousands) |  |  | Price |  |  | (In thousands) |  |  | (in years) |
Outstanding at June 30, 2020 |  |  | 86 |  |  | $ | 5.14 |  |  | $ | 194 |  |  |  | 4.74 |
Issued |  |  | 2,307 |  |  |  | 2.30 |  |  |  | 3,553 |  |  |  | 4.63 |
Exercised |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Canceled or expired |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Outstanding at June 30, 2021 |  |  | 2,393 |  |  | $ | 2.40 |  |  | $ | 3,747 |  |  |  | 4.63 |
Issued |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Exercised |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Canceled or expired |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Outstanding at June 30, 2022 |  |  | 2,393 |  |  | $ | 2.40 |  |  | $ | 3,747 |  |  |  | 3.60 |
The Company has made an immaterial error correction to the table above to reflect the correct weighted average exercise price and weighted average remaining contractual term reported as of June 30, 2021. Management evaluated the materiality of the error, both quantitatively and qualitatively, and concluded that it was not material to the consolidated financial statements of any period presented. There was no change to the consolidated balance sheets or consolidated statements of operations and comprehensive loss for the previous fiscal year. The following represents a summary of the warrants outstanding at each of the dates identified:
|  |  |  |  |  |  |  |  | Number of Shares Underlying |
|  |  |  |  |  |  |  |  | Warrants |
|  |  |  |  |  |  |  |  | (In thousands) |
|  |  |  |  |  |  |  |  | For the period ended June 30, |
Issue Date |  | Classification |  | Exercise Price |  | Expiration Date |  | 2022 |  |  | 2021 |
March 26, 2020 |  | Equity |  | $ | 6.25 |  | March 25, 2025 |  |  | 25 |  |  |  | 25 |
March 30, 2020 |  | Equity |  | $ | 4.6875 |  | March 27, 2025 |  |  | 61 |  |  |  | 61 |
October 23, 2020 |  | Equity |  | $ | 2.88 |  | October 21, 2025 |  |  | 470 |  |  |  | 470 |
October 28, 2020 |  | Equity |  | $ | 2.6875 |  | October 28, 2025 |  |  | 173 |  |  |  | 173 |
February 16, 2021 |  | Equity |  | $ | 4.06 |  | February 11, 2026 |  |  | 171 |  |  |  | 171 |
April 12, 2021 |  | Equity |  | $ | 1.875 |  | April 7, 2026 |  |  | 1,493 |  |  |  | 1,493 |
Total Outstanding |  |  |  |  |  |  |  | 2,393 |  |  |  | 2,393 |
Nasdaq Compliance On December 21, 2021, the Company received a deficiency letter from Nasdaq indicating that, based upon the closing bid price of the Company’s common stock over the preceding 30 consecutive business days, the Company did not meet the minimum bid price of $1.00 per share (the “Bid Price Requirement”) required for continued listing on The Nasdaq Capital Market pursuant to Nasdaq Listing Rule 5550(a)(2). The letter indicated that the Company had a period of 180 calendar days, or until June 20, 2022 (the “First Compliance Period”), in which to regain compliance pursuant to Nasdaq Listing Rule 5810(c)(3)(A) by having the Company’s common stock meet a closing bid price of at least $1.00 for a minimum of ten consecutive business days during the First Compliance Period. The Company determined that it would not be in compliance with the minimum Bid Price Requirement by June 20, 2022. As a result, the Company notified Nasdaq and applied for an extension of the compliance period, as permitted under the original notification. In the application, the Company indicated that it met the continued listing requirement for market value of publicly-held shares and all other initial listing standards for the Nasdaq Capital Market, with the exception of the minimum closing bid price requirement, and provided written notice of its intention to cure the deficiency during the second compliance period of an additional 180 days by effecting a reverse stock split, if necessary. On June 27, 2022, the Company received notification from Nasdaq that the date to achieve compliance had been extended an additional 180 days until December 19, 2022 (the “Second Compliance Period”). The Company plans to carefully assess potential actions to regain compliance during the Second Compliance Period. To regain compliance, the closing bid price of the Company’s common stock must be at least $1.00 per share for a minimum of ten consecutive business days during the Second Compliance Period. If the Company fails to regain compliance on or prior to December 19, 2022, the Company’s stock will be delisted by Nasdaq, unless the Company timely appeals for a hearing before a Nasdaq Hearings Panel. The request for a hearing will stay any suspension or delisting action pending the issuance of the decision of the Nasdaq Hearings Panel following the hearing and the expiration of any additional extension granted by the Nasdaq Hearings Panel.

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI https://asc.fasb.org/topic&trid=2208762 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 14 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496171-112644 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 14 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496171-112644 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 18 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496189-112644 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (g) -URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 18 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496189-112644 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (h) -URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 14 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496171-112644 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 18 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496189-112644 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 16 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496180-112644 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (i) -URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644 Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(e)(1)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 40 -Section 50 -Paragraph 6 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126731327&loc=SL126733271-114008 + Details
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