Subsequent Events	12 Months Ended
Dec. 31, 2022
Subsequent Events [Abstract]
Subsequent Events	Note 24 – Subsequent Events Dividend approval On February 20, 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 at the close of business on March 7, 2023. The payment date will be March 21, 2023 in the aggregate amount of approximately $7.0 million. Effectiveness of the Domination and Profit and Loss Transfer Agreement The DPLTA between the Company, as the controlling company, and ADVA Optical Networking SE, as the controlled company as executed on December 1, 2022, became effective on January 16, 2023, as a result of its registration with the commercial register (Handelsregister) of the local court (Amtsgericht) at the registered seat of ADVA (Jena). Under the DPLTA, subject to certain limitations pursuant to applicable law and the specific terms of the DPLTA, (i) the Company is entitled to issue binding instructions to the management board of ADVA, (ii) ADVA will transfer its annual profit to the Company, subject to, among other things, the creation or dissolution of certain reserves, and (iii) the Company will generally absorb the annual net loss incurred by ADVA. The obligation of ADVA to transfer its annual profit to the Company applies for the first time to the profit generated in the ADVA fiscal year 2023. The obligation of the Company to absorb ADVA’s annual net loss applies for the first time to the loss generated in the ADVA fiscal year 2023. Expansion of Wells Fargo Line of Credit & Payoff of ADVA Loans. Upon the DPLTA becoming effective on January 16, 2023, the available total borrowings under the Wells Fargo Credit Agreement increased from $100 million to $400 million. On January 31, 2023, the Company increased its borrowings under the Credit Agreement from $60.0 million to $187.5 million. In February 2023, the borrowings under the Credit Agreement were paid down by $7.5 million, leaving $180.0 million of borrowings as of February 28, 2023. After considering our outstanding letters of credit, this leaves the Company approximately $198.7 million available for future borrowings as of February 28, 2023. The Company used approximately $51.4 million of the proceeds from the borrowings under the Credit Agreement to retire the outstanding borrowings under ADVA's syndicated credit agreement note payable, syndicated credit agreement working capital line of credit and the Nord/LB revolving line of credit. ADVA's $9.1 million of borrowings under their revolving line of credit with DZ bank remains outstanding. Integration Bonus Plan On March 1, 2023, the Compensation Committee of the Board of Directors of the Company established an “Integration Bonus Plan” consisting of a combination of performance-based performance stock units ("PSUs") and cash bonus award amounts (together with the PSUs, the “Integration Awards”). Under the Integration Bonus Plan, certain key employees of the Company, including the Company’s named executive officers as disclosed in the most recent proxy statement filed by the Company with the SEC (the “Participants”), are eligible to earn the Integration Awards over a performance period beginning upon the date of the grant and ending on December 31, 2024 based on the achievement of cost savings targets related to the Business Combination. See Item 9B. Other Information of this the Original Filing for addition information.

Subsequent Events

12 Months Ended

Dec. 31, 2022

Note 24 – Subsequent Events

Dividend approval

On February 20, 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 at the close of business on March 7, 2023. The payment date will be March 21, 2023 in the aggregate amount of approximately $7.0 million.

Effectiveness of the Domination and Profit and Loss Transfer Agreement

The DPLTA between the Company, as the controlling company, and ADVA Optical Networking SE, as the controlled company as executed on December 1, 2022, became effective on January 16, 2023, as a result of its registration with the commercial register (Handelsregister) of the local court (Amtsgericht) at the registered seat of ADVA (Jena).

Under the DPLTA, subject to certain limitations pursuant to applicable law and the specific terms of the DPLTA, (i) the Company is entitled to issue binding instructions to the management board of ADVA, (ii) ADVA will transfer its annual profit to the Company, subject to, among other things, the creation or dissolution of certain reserves, and (iii) the Company will generally absorb the annual net loss incurred by ADVA. The obligation of ADVA to transfer its annual profit to the Company applies for the first time to the profit generated in the ADVA fiscal year 2023. The obligation of the Company to absorb ADVA’s annual net loss applies for the first time to the loss generated in the ADVA fiscal year 2023.

Expansion of Wells Fargo Line of Credit & Payoff of ADVA Loans.

Upon the DPLTA becoming effective on January 16, 2023, the available total borrowings under the Wells Fargo Credit Agreement increased from $100 million to $400 million. On January 31, 2023, the Company increased its borrowings under the Credit Agreement from $60.0 million to $187.5 million. In February 2023, the borrowings under the Credit Agreement were paid down by $7.5 million, leaving $180.0 million of borrowings as of February 28, 2023. After considering our outstanding letters of credit, this leaves the Company approximately $198.7 million available for future borrowings as of February 28, 2023. The Company used approximately $51.4 million of the proceeds from the borrowings under the Credit Agreement to retire the outstanding borrowings under ADVA's syndicated credit agreement note payable, syndicated credit agreement working capital line of credit and the Nord/LB revolving line of credit. ADVA's $9.1 million of borrowings under their revolving line of credit with DZ bank remains outstanding.

Integration Bonus Plan

On March 1, 2023, the Compensation Committee of the Board of Directors of the Company established an “Integration Bonus Plan” consisting of a combination of performance-based performance stock units ("PSUs") and cash bonus award amounts (together with the PSUs, the “Integration Awards”). Under the Integration Bonus Plan, certain key employees of the Company, including the Company’s named executive officers as disclosed in the most recent proxy statement filed by the Company with the SEC (the “Participants”), are eligible to earn the Integration Awards over a performance period beginning upon the date of the grant and ending on December 31, 2024 based on the achievement of cost savings targets related to the Business Combination. See Item 9B. Other Information of this the Original Filing for addition information.