Subsequent Events	3 Months Ended
Mar. 31, 2023
Subsequent Events [Abstract]
Subsequent Events	22. SUBSEQUENT EVENTS Dividend Approval On May 8, 2023, the Company announced that its Board of Directors declared a quarterly cash dividend of $0.09 per common share to be paid to the Company’s stockholders of record as of the close of business on May 23, 2023. The payment date will be June 6, 2023 in the aggregate amount of approximately $7.1 million. Appointment of Ulrich Dopfer as Principal Accounting Officer As previously disclosed on the Company’s Form 8-K filed on March 30, 2023, Michael Foliano, formerly Senior Vice President of Finance and Chief Financial Officer of the Company, notified the Company of his intent to retire, effective June 28, 2023. Mr. Foliano served in his role as Chief Financial Officer of the Company through April 30, 2023. In connection with his transition, the Board of Directors appointed Ulrich Dopfer as Senior Vice President and Chief Financial Officer of the Company, effective May 1, 2023; however, Mr. Foliano continued to serve as the Company’s “principal accounting officer” within the meaning of the rules of the SEC under the Exchange Act (the “Principal Accounting Officer”), and as the Company’s Treasurer and Secretary. On May 10, 2023, the Board of Directors removed Mr. Foliano from such roles, designated Mr. Dopfer as the Company’s Principal Accounting Officer, and elected Mr. Dopfer as Treasurer and Secretary of the Company, effective as of such date. ADVA Legal Matter On May 8, 2023, ADVA and its U.S. subsidiary, ADVA Optical Networking North America Inc., filed a lawsuit in the U.S District Court for the Eastern District of Texas against Huawei Technologies Co. Ltd (“Huawei”) seeking a declaration from the court that Huawei violated contractual commitments to negotiate in good faith and to license patents, to the extent any patents are practiced by ADVA, on Fair, Reasonable and Non-Discriminatory (“FRAND”) terms and conditions. The case also seeks to obtain a ruling by the court that ADVA has complied with its own commitments and requests that the Court establish FRAND terms and conditions for obtaining a FRAND license on any standard essential patents that ADVA does in fact practice. The lawsuit also seeks to enjoin Huawei from enforcing certain of its patents against ADVA and its affiliates in other jurisdictions, and includes allegations by ADVA that it does not infringe five Huawei patents and that Huawei has infringed an ADVA patent. Huawei has not yet filed an answer in this matter. Given the current status of this matter, the Company is unable predict the outcome of or estimate the possible loss or range of loss, if any, associated with such legal matters.

Subsequent Events

3 Months Ended

Mar. 31, 2023

22. SUBSEQUENT EVENTS

Dividend Approval

On May 8, 2023, the Company announced that its Board of Directors declared a quarterly cash dividend of $0.09 per common share to be paid to the Company’s stockholders of record as of the close of business on May 23, 2023. The payment date will be June 6, 2023 in the aggregate amount of approximately $7.1 million.

Appointment of Ulrich Dopfer as Principal Accounting Officer

As previously disclosed on the Company’s Form 8-K filed on March 30, 2023, Michael Foliano, formerly Senior Vice President of Finance and Chief Financial Officer of the Company, notified the Company of his intent to retire, effective June 28, 2023. Mr. Foliano served in his role as Chief Financial Officer of the Company through April 30, 2023. In connection with his transition, the Board of Directors appointed Ulrich Dopfer as Senior Vice President and Chief Financial Officer of the Company, effective May 1, 2023; however, Mr. Foliano continued to serve as the Company’s “principal accounting officer” within the meaning of the rules of the SEC under the Exchange Act (the “Principal Accounting Officer”), and as the Company’s Treasurer and Secretary. On May 10, 2023, the Board of Directors removed Mr. Foliano from such roles, designated Mr. Dopfer as the Company’s Principal Accounting Officer, and elected Mr. Dopfer as Treasurer and Secretary of the Company, effective as of such date.

ADVA Legal Matter

On May 8, 2023, ADVA and its U.S. subsidiary, ADVA Optical Networking North America Inc., filed a lawsuit in the U.S District Court for the Eastern District of Texas against Huawei Technologies Co. Ltd (“Huawei”) seeking a declaration from the court that Huawei violated contractual commitments to negotiate in good faith and to license patents, to the extent any patents are practiced by ADVA, on Fair, Reasonable and Non-Discriminatory (“FRAND”) terms and conditions. The case also seeks to obtain a ruling by the court that ADVA has complied with its own commitments and requests that the Court establish FRAND terms and conditions for obtaining a FRAND license on any standard essential patents that ADVA does in fact practice. The lawsuit also seeks to enjoin Huawei from enforcing certain of its patents against ADVA and its affiliates in other jurisdictions, and includes allegations by ADVA that it does not infringe five Huawei patents and that Huawei has infringed an ADVA patent. Huawei has not yet filed an answer in this matter. Given the current status of this matter, the Company is unable predict the outcome of or estimate the possible loss or range of loss, if any, associated with such legal matters.