Organization and Plan of Business Operations	6 Months Ended
Jun. 30, 2026
Organization and Plan of Business Operations [Abstract]
Organization and Plan of Business Operations	Note 1 — Organization and Plan of Business Operations Allegro Merger Corp. (the “Company”) was incorporated in Delaware on August 7, 2017 as a blank check company whose objective is to acquire, through a merger, share exchange, asset acquisition, stock purchase, recapitalization, reorganization or other similar business combination, one or more businesses or entities (a “Business Combination”). All activity through June 30, 2026, relates to the Company’s formation, the Company’s initial public offering of units (“Initial Public Offering”) described below and, since the Initial Public Offering, the search for a prospective initial Business Combination. The registration statement for the Company’s Initial Public Offering was declared effective on July 2, 2018. On July 6, 2018, the Company consummated the Initial Public Offering of 14,950,000 units (“Units” and, with respect to the common stock included in the Units being offered, the “Public Shares”), including 1,950,000 Units issued pursuant to the exercise in full of the underwriters’ overallotment option, generating gross proceeds of $149,500,000, which is described in Note 3. Each Unit consisted of one share of the Company’s common stock, $0.0001 par value, one redeemable common stock purchase warrant (the “Warrants”) and one right (the “Rights”). Each Warrant entitles the holder to purchase one share of common stock at an exercise price of $11.50 per share (see Note 7). Each Right entitles the holder to receive one tenth (1/10) of one share of common stock upon the completion of a Business Combination. Simultaneously with the closing of the Initial Public Offering, the Company consummated the sale of 372,500 units (“Private Units”), at a price of $10.00 per Private Unit in a private placement to certain of the Initial Stockholders (defined below), Cantor Fitzgerald & Co. and Chardan Capital Markets LLC (collectively, the “Insiders”), generating gross proceeds of $3,725,000, which is described in Note 4. Following the closing of the Initial Public Offering on July 6, 2018, an amount of $149,500,000 ($10.00 per Unit) from the net proceeds of the sale of the Units in the Initial Public Offering and the Private Units was placed in a trust account (“Trust Account”) and was invested in United States government treasury bills, bonds or notes, having a maturity of 180 days or less or in money market funds meeting certain conditions under Rule 2a-7 promulgated under the Investment Company Act. On July 6, 2018, in connection with the underwriters’ election to fully exercise their over-allotment option, the Company consummated the sale of an additional 1,950,000 Units, at $10.00 per Unit. Dissolution of Trust Account; Delisting and Deregistration of Securities Pursuant to the Charter, on March 31, 2020, the Company began the process of liquidating and distributing to its public stockholders their pro rata portion of the funds contained in the Trust Account, including interest earned on the amounts on deposit, less amounts that be released to the Company to pay franchise and income taxes and up to $100,000 of interest which may be released to the Company to pay dissolution expenses. On April 21, 2020, all of the public shares were redeemed at a per share redemption price of $10.30. On August 23, 2021, we distributed the remaining restricted cash pro rata, to our former public stockholders in the amount of $129,957. The restricted cash balance represented the unused portion of our dissolution allowance and allowance for taxes. An aggregate of approximately $781,700 of loans made by the initial stockholders to the Company in connection with extensions of time to complete an initial business will not be repaid and will be forgiven if we are unable to consummate a business combination and determine to liquidate and dissolve. The initial stockholders waived their redemption rights with respect to the common stock issued prior to the Company’s initial public offering and the common stock underlying the Private Units. Accordingly, such initial stockholders did not participate in the redemption and an aggregate of 4,110,000 shares of common stock remain outstanding. Additionally, the Company’s rights and warrants remain outstanding. On April 20, 2020, Nasdaq filed a Form 25 to delist and deregister the units, common stock, rights, and warrants. Such securities were delisted from Nasdaq as of April 30, 2020 and deregistered under Section 12(b) of the Exchange Act as of July 9, 2020. Merger Agreement On January 16, 2026, the Company entered into an Agreement and Plan of Merger (“Merger Agreement”) with SEEQC, Inc., a Delaware corporation (“SeeQC”), and SEEQC Merger Sub, Inc., a Delaware corporation and a wholly-owned subsidiary of SeeQC (“Merger Sub”). Pursuant to the Merger Agreement, the Company will merge with and into Merger Sub, with the Company surviving the merger (the “Merger”). As a result of the Merger, the Company will become a direct, wholly-owned subsidiary of SeeQC and the security holders of the Company will become security holders of SeeQC. At the effective time of the Merger (“Effective Time”), each share of common stock of the Company (“Allegro Common Stock”), and each right of the Company (“Allegro Rights”), that is issued and outstanding immediately before the Effective Time (other than shares held by the Company, SeeQC or their subsidiaries and shares as to which statutory dissenter’s rights have been exercised) will be canceled and converted into and become the right to receive one share of SeeQC common stock (multiplied by 1/10^th in the case of the Allegro Rights). In connection with the Merger, the Company will seek to amend its redeemable common stock purchase warrants, each entitling the holder thereof to purchase one share of Allegro Common Stock at an exercise price of $11.50 (collectively, “Allegro Warrants”), so that, immediately prior to the Effective Time, each of the issued and outstanding Allegro Warrants will automatically convert into the right to receive a fractional share of SeeQC common stock (the “Allegro Warrant Amendment”). In the event that the Allegro Warrants are not amended and the Merger is consummated, SeeQC will assume them. The consummation of the transactions contemplated by the Merger Agreement is subject to the satisfaction of closing conditions set forth therein. Going Concern As of June 30, 2026, the Company had a cash balance of $226 and a working capital deficit of $1,213,748. In addition, in connection with the Company’s assessment of going concern considerations in accordance with Financial Accounting Standard Board’s Accounting Standards Update (“ASU”) 2014-15, “Disclosures of Uncertainties about an Entity’s Ability to Continue as a Going Concern”, management has determined that the company has substantial doubt about the company’s ability to continue as a going concern because the company has no operations to achieve any revenue and is dependent on obtaining outside capital via debt or equity to fund operating expenses. Thus the company has substantial doubt about the Company’s ability to continue as a going concern. No adjustments have been made to the carrying amounts of assets or liabilities should the Company liquidate after June 30, 2026.

Organization and Plan of Business Operations

6 Months Ended

Jun. 30, 2026

Organization and Plan of Business Operations [Abstract]

Organization and Plan of Business Operations

Note 1 — Organization and Plan of Business Operations

Allegro Merger Corp. (the “Company”) was incorporated in Delaware on August 7, 2017 as a blank check company whose objective is to acquire, through a merger, share exchange, asset acquisition, stock purchase, recapitalization, reorganization or other similar business combination, one or more businesses or entities (a “Business Combination”).

All activity through June 30, 2026, relates to the Company’s formation, the Company’s initial public offering of units (“Initial Public Offering”) described below and, since the Initial Public Offering, the search for a prospective initial Business Combination.

The registration statement for the Company’s Initial Public Offering was declared effective on July 2, 2018. On July 6, 2018, the Company consummated the Initial Public Offering of 14,950,000 units (“Units” and, with respect to the common stock included in the Units being offered, the “Public Shares”), including 1,950,000 Units issued pursuant to the exercise in full of the underwriters’ overallotment option, generating gross proceeds of $149,500,000, which is described in Note 3. Each Unit consisted of one share of the Company’s common stock, $0.0001 par value, one redeemable common stock purchase warrant (the “Warrants”) and one right (the “Rights”). Each Warrant entitles the holder to purchase one share of common stock at an exercise price of $11.50 per share (see Note 7). Each Right entitles the holder to receive one tenth (1/10) of one share of common stock upon the completion of a Business Combination.

Simultaneously with the closing of the Initial Public Offering, the Company consummated the sale of 372,500 units (“Private Units”), at a price of $10.00 per Private Unit in a private placement to certain of the Initial Stockholders (defined below), Cantor Fitzgerald & Co. and Chardan Capital Markets LLC (collectively, the “Insiders”), generating gross proceeds of $3,725,000, which is described in Note 4.

Following the closing of the Initial Public Offering on July 6, 2018, an amount of $149,500,000 ($10.00 per Unit) from the net proceeds of the sale of the Units in the Initial Public Offering and the Private Units was placed in a trust account (“Trust Account”) and was invested in United States government treasury bills, bonds or notes, having a maturity of 180 days or less or in money market funds meeting certain conditions under Rule 2a-7 promulgated under the Investment Company Act.

On July 6, 2018, in connection with the underwriters’ election to fully exercise their over-allotment option, the Company consummated the sale of an additional 1,950,000 Units, at $10.00 per Unit.

Dissolution of Trust Account; Delisting and Deregistration of Securities

Pursuant to the Charter, on March 31, 2020, the Company began the process of liquidating and distributing to its public stockholders their pro rata portion of the funds contained in the Trust Account, including interest earned on the amounts on deposit, less amounts that be released to the Company to pay franchise and income taxes and up to $100,000 of interest which may be released to the Company to pay dissolution expenses. On April 21, 2020, all of the public shares were redeemed at a per share redemption price of $10.30. On August 23, 2021, we distributed the remaining restricted cash pro rata, to our former public stockholders in the amount of $129,957. The restricted cash balance represented the unused portion of our dissolution allowance and allowance for taxes.

An aggregate of approximately $781,700 of loans made by the initial stockholders to the Company in connection with extensions of time to complete an initial business will not be repaid and will be forgiven if we are unable to consummate a business combination and determine to liquidate and dissolve.

The initial stockholders waived their redemption rights with respect to the common stock issued prior to the Company’s initial public offering and the common stock underlying the Private Units. Accordingly, such initial stockholders did not participate in the redemption and an aggregate of 4,110,000 shares of common stock remain outstanding. Additionally, the Company’s rights and warrants remain outstanding.

On April 20, 2020, Nasdaq filed a Form 25 to delist and deregister the units, common stock, rights, and warrants. Such securities were delisted from Nasdaq as of April 30, 2020 and deregistered under Section 12(b) of the Exchange Act as of July 9, 2020.

Merger Agreement

On January 16, 2026, the Company entered into an Agreement and Plan of Merger (“Merger Agreement”) with SEEQC, Inc., a Delaware corporation (“SeeQC”), and SEEQC Merger Sub, Inc., a Delaware corporation and a wholly-owned subsidiary of SeeQC (“Merger Sub”). Pursuant to the Merger Agreement, the Company will merge with and into Merger Sub, with the Company surviving the merger (the “Merger”). As a result of the Merger, the Company will become a direct, wholly-owned subsidiary of SeeQC and the security holders of the Company will become security holders of SeeQC.

At the effective time of the Merger (“Effective Time”), each share of common stock of the Company (“Allegro Common Stock”), and each right of the Company (“Allegro Rights”), that is issued and outstanding immediately before the Effective Time (other than shares held by the Company, SeeQC or their subsidiaries and shares as to which statutory dissenter’s rights have been exercised) will be canceled and converted into and become the right to receive one share of SeeQC common stock (multiplied by 1/10^th in the case of the Allegro Rights).

In connection with the Merger, the Company will seek to amend its redeemable common stock purchase warrants, each entitling the holder thereof to purchase one share of Allegro Common Stock at an exercise price of $11.50 (collectively, “Allegro Warrants”), so that, immediately prior to the Effective Time, each of the issued and outstanding Allegro Warrants will automatically convert into the right to receive a fractional share of SeeQC common stock (the “Allegro Warrant Amendment”). In the event that the Allegro Warrants are not amended and the Merger is consummated, SeeQC will assume them.

The consummation of the transactions contemplated by the Merger Agreement is subject to the satisfaction of closing conditions set forth therein.

Going Concern

As of June 30, 2026, the Company had a cash balance of $226 and a working capital deficit of $1,213,748.

In addition, in connection with the Company’s assessment of going concern considerations in accordance with Financial Accounting Standard Board’s Accounting Standards Update (“ASU”) 2014-15, “Disclosures of Uncertainties about an Entity’s Ability to Continue as a Going Concern”, management has determined that the company has substantial doubt about the company’s ability to continue as a going concern because the company has no operations to achieve any revenue and is dependent on obtaining outside capital via debt or equity to fund operating expenses. Thus the company has substantial doubt about the Company’s ability to continue as a going concern. No adjustments have been made to the carrying amounts of assets or liabilities should the Company liquidate after June 30, 2026.