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Pay vs Performance Disclosure - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Pay vs Performance Disclosure          
Pay vs Performance Disclosure, Table
​ ​
Year
​ ​ ​
Summary
Compensation
Table Total for
PEO(1)
($)
​ ​ ​
Compensation
Actually Paid to
PEO(1)(2)(3)
($)
​ ​ ​
Average
Summary
Compensation
Table Total for
Non-PEO
NEOs(1)
($)
​ ​ ​
Average
Compensation
Actually Paid to
Non-PEO
NEOs(1)(2)(3)
($)
​ ​ ​
Value of Initial
Fixed $100
Investment based
on:(4)
​ ​ ​
Net Income
($)
(Thousands)
​ ​ ​
Non-GAAP
EBITDA(5)
($)
(Thousands)
​ ​
​
TSR
($)
​ ​ ​
Peer Group
TSR
($)
​ ​
​ ​ 2024 ​ ​ ​ ​ ​ 3,695,421 ​ ​ ​ ​ ​ ​ 33,286,022 ​ ​ ​ ​ ​ ​ 1,160,525 ​ ​ ​ ​ ​ ​ 9,517,874 ​ ​ ​ ​ ​ ​ 310.27 ​ ​ ​ ​ ​ ​ 123.89 ​ ​ ​ ​ ​ ​ (194,415) ​ ​ ​ ​ ​ ​ (30,216) ​ ​ ​
​ ​ 2023 ​ ​ ​ ​ ​ 6,049,470 ​ ​ ​ ​ ​ ​ 38,409,964 ​ ​ ​ ​ ​ ​ 1,923,067 ​ ​ ​ ​ ​ ​ 11,430,710 ​ ​ ​ ​ ​ ​ 162.63 ​ ​ ​ ​ ​ ​ 102.83 ​ ​ ​ ​ ​ ​ (56,048) ​ ​ ​ ​ ​ ​ (364) ​ ​ ​
​ ​ 2022 ​ ​ ​ ​ ​ 2,157,067 ​ ​ ​ ​ ​ ​ 456,994 ​ ​ ​ ​ ​ ​ 811,490 ​ ​ ​ ​ ​ ​ 311,906 ​ ​ ​ ​ ​ ​ 15.91 ​ ​ ​ ​ ​ ​ 109.42 ​ ​ ​ ​ ​ ​ (66,397) ​ ​ ​ ​ ​ ​ (18,501) ​ ​ ​
​ ​ 2021 ​ ​ ​ ​ ​ 3,659,008 ​ ​ ​ ​ ​ ​ 2,725,556 ​ ​ ​ ​ ​ ​ 1,251,466 ​ ​ ​ ​ ​ ​ 988,822 ​ ​ ​ ​ ​ ​ 43.27 ​ ​ ​ ​ ​ ​ 169.88 ​ ​ ​ ​ ​ ​ (54,162) ​ ​ ​ ​ ​ ​ (8,413) ​ ​ ​
​ ​ 2020 ​ ​ ​ ​ ​ 2,476,271 ​ ​ ​ ​ ​ ​ 2,242,974 ​ ​ ​ ​ ​ ​ 899,965 ​ ​ ​ ​ ​ ​ 870,688 ​ ​ ​ ​ ​ ​ 71.63 ​ ​ ​ ​ ​ ​ 137.07 ​ ​ ​ ​ ​ ​ (58,452) ​ ​ ​ ​ ​ ​ (3,212) ​ ​ ​
(1)
Chih-Hsiang (Thompson) Lin was our PEO for each year presented. The individuals comprising the Non-PEO NEOs for each year presented are listed below.
​
​ ​
2020 – 2024
​ ​
​ ​
Stefan J. Murry
​ ​
​ ​
Hung-Lun (Fred) Chang
​ ​
​ ​
Shu-Hua (Joshua) Yeh
​ ​
​ ​
David C. Kuo
​ ​
​
(2)
The amounts shown for Compensation Actually Paid have been calculated in accordance with Item 402(v) of Regulation S-K and do not reflect compensation actually earned, realized, or received by the Company’s NEOs. These amounts reflect the Summary Compensation Table Total with certain adjustments as described in footnote 3 below.
​
(3)
Compensation Actually Paid reflects the exclusions and inclusions of certain amounts for the PEO and the Non-PEO NEOs as set forth below. Equity values are calculated in accordance with FASB ASC Topic 718. Amounts in the Exclusion of Stock Awards and Option Awards column are the totals from the Stock Awards and Option Awards columns set forth in the Summary Compensation Table.
​
​ ​
Year
​ ​ ​
Summary Compensation
Table Total for PEO
($)
​ ​ ​
Exclusion of Stock
Awards and
Option Awards
for PEO
($)
​ ​ ​
Inclusion of Equity
Values for PEO
($)
​ ​ ​
Compensation Actually
Paid to PEO
($)
​ ​
​ ​
2024
​ ​ ​ ​ ​ 3,695,421 ​ ​ ​ ​ ​ ​ (2,522,729) ​ ​ ​ ​ ​ ​ 32,113,330 ​ ​ ​ ​ ​ ​ 33,286,022 ​ ​ ​
​ ​
Year
​ ​ ​
Average Summary
Compensation
Table Total for Non-PEO
NEOs
($)
​ ​ ​
Average Exclusion of Stock
Awards and Option Awards for
Non-PEO NEOs
($)
​ ​ ​
Average Inclusion of
Equity Values
for Non-PEO NEOs
($)
​ ​ ​
Average Compensation
Actually Paid to Non-PEO
NEOs
($)
​ ​
​ ​
2024
​ ​ ​ ​ ​ 1,160,525 ​ ​ ​ ​ ​ ​ (643,817) ​ ​ ​ ​ ​ ​ 9,001,166 ​ ​ ​ ​ ​ ​ 9,517,874 ​ ​ ​
The amounts in the Inclusion of Equity Values in the tables above are derived from the amounts set forth in the following tables:
​ ​
Year
​ ​ ​
Year-End Fair Value of
Equity Awards Granted
During Year That
Remained Unvested as of
Last Day of Year for
PEO
($)
​ ​ ​
Change in Fair Value
from Last Day of Prior
Year to Last Day of
Year of Unvested
Equity Awards for
PEO
($)
​ ​ ​
Vesting-Date Fair
Value of Equity
Awards Granted
During Year that
Vested During
Year for PEO
($)
​ ​ ​
Change in Fair
Value from Last
Day of Prior Year to
Vesting Date of
Unvested Equity
Awards that Vested
During Year for
PEO
($)
​ ​ ​
Total – Inclusion
of Equity Values
for PEO
($)
​ ​
​ ​
2024
​ ​ ​ ​ ​ 9,599,146 ​ ​ ​ ​ ​ ​ 25,761,959 ​ ​ ​ ​ ​ ​ 238,772 ​ ​ ​ ​ ​ ​ (3,486,574) ​ ​ ​ ​ ​ ​ 32,113,330 ​ ​ ​
​ ​
Year
​ ​ ​
Average Year-End
Fair Value of Equity
Awards Granted
During Year That
Remained Unvested
as of Last Day of
Year for Non-PEO
NEOs
($)
​ ​ ​
Average Change in
Fair Value from
Last Day of Prior
Year to Last Day of
Year of Unvested
Equity Awards for
Non-PEO NEOs
($)
​ ​ ​
Average Vesting-
Date Fair Value of
Equity Awards
Granted During
Year that Vested
During Year for
Non-PEO NEOs
($)
​ ​ ​
Average Change in
Fair Value from
Last Day of Prior
Year to Vesting
Date of Unvested
Equity Awards that
Vested During
Year for Non-PEO
NEOs
($)
​ ​ ​
Total – Average
Inclusion of
Equity Values for
Non-PEO NEOs
($)
​ ​
​ ​
2024
​ ​ ​ ​ ​ 2,449,764 ​ ​ ​ ​ ​ ​ 7,524,673 ​ ​ ​ ​ ​ ​ 60,936 ​ ​ ​ ​ ​ ​ (1,034,207) ​ ​ ​ ​ ​ ​ 9,001,166 ​ ​ ​
​
(4)
The Peer Group TSR set forth in this table utilizes the peer companies used for compensation benchmarking purposes, which are summarized in the “Compensation Discussion and Analysis” section of this Proxy Statement, for the years reflected in the table above but excludes companies that had ceased to be publicly traded as of the end of each fiscal year.
​
​ ​
2020
​ ​ ​
2021
​ ​ ​
2022 – 2023
​ ​ ​
2024
​ ​
​ ​ Axcelis Technologies, Inc.
ADTRAN Holdings, Inc.
Alpha and Omega Semiconductor Limited
Aviat Networks, Inc.
Calix, Inc.
CalAmp Corp.
Casa Systems, Inc.
Cohu, Inc.
Digi International Inc.
DSP Group, Inc.
EMCORE Corporation
Harmonic Inc.
Inseego Corp.
KVH Industries, Inc.
NeoPhotonics Corporation
Photronics, Inc.
Ribbon Communications Inc.
Xperi Inc. 		​ ​ ​ Axcelis Technologies, Inc.
ADTRAN Holdings, Inc.
Alpha and Omega Semiconductor Limited
Aviat Networks, Inc.
Calix, Inc.
CalAmp Corp.
Casa Systems, Inc.
Cohu, Inc.
Digi International Inc.
EMCORE Corporation
Harmonic Inc.
Inseego Corp.
KVH Industries, Inc.
NeoPhotonics Corporation
Photronics, Inc.
Ribbon Communications Inc.
Xperi Inc. 		​ ​ ​ Axcelis Technologies, Inc.
ADTRAN Holdings, Inc.
Alpha and Omega Semiconductor Limited
Aviat Networks, Inc.
Calix, Inc.
CalAmp Corp.
Casa Systems, Inc.
Cohu, Inc.
Digi International Inc.
EMCORE Corporation
Harmonic Inc.
Inseego Corp.
KVH Industries, Inc.
Photronics, Inc.
Ribbon Communications Inc.
Xperi Inc. 		​ ​ ​ A10 Networks, Inc.
ADTRAN Holdings, Inc.
ACM Research, Inc.
Alpha and Omega Semiconductor Limited Aviat Networks, Inc.
CEVA, Inc.
Clearfield, Inc.
Cohu, Inc.
Comtech
Telecommunications
Digi International Inc.
Harmonic Inc.
indie Semiconductor, Inc.
NETGEAR, Inc.
OneSpan, Inc.
Photronics, Inc.
Ribbon
Communications Inc.
Semtech Corporation SkyWater Technology, Inc.
Vishay Precision Group, Inc.
Xperi Inc. 		​ ​
The comparison assumes $100 was invested for the period starting December 31, 2019, through the end of the listed year in the Company and in the compensation benchmarking peers, respectively. Historical stock performance is not necessarily indicative of future stock performance. As described in the Compensation Discussion and Analysis section of this Proxy Statement, after the compensation committee reviewed our compensation peer group in the third quarter of 2023, the compensation committee updated the peer group criteria and the peer group companies that were used to assist with the determination of compensation for our executive officers for fiscal 2024. If the previous peer group had been used to calculate the peer group TSR, the amounts shown for 2024, 2023, 2022, 2021 and 2020 would have been $156.26, $178.88, $178.07, $215.25, and $142.68, respectively
(5)
We determined Non-GAAP EBITDA to be the most important financial performance measure used to link Company performance to Compensation Actually Paid to our PEO and Non-PEO NEOs in 2024. A definition of Non-GAAP EBITDA is provided in the Compensation Discussion and Analysis section of this Proxy Statement, and a reconciliation of Non-GAAP EBITDA to GAAP is attached to this Proxy Statement as Appendix A.
       
Named Executive Officers, Footnote
(1)
Chih-Hsiang (Thompson) Lin was our PEO for each year presented. The individuals comprising the Non-PEO NEOs for each year presented are listed below.
​ ​
2020 – 2024
​ ​
​ ​
Stefan J. Murry
​ ​
​ ​
Hung-Lun (Fred) Chang
​ ​
​ ​
Shu-Hua (Joshua) Yeh
​ ​
​ ​
David C. Kuo
​ ​
       
Peer Group Issuers, Footnote
(4)
The Peer Group TSR set forth in this table utilizes the peer companies used for compensation benchmarking purposes, which are summarized in the “Compensation Discussion and Analysis” section of this Proxy Statement, for the years reflected in the table above but excludes companies that had ceased to be publicly traded as of the end of each fiscal year.
       
PEO Total Compensation Amount $ 3,695,421 $ 6,049,470 $ 2,157,067 $ 3,659,008 $ 2,476,271
PEO Actually Paid Compensation Amount $ 33,286,022 38,409,964 456,994 2,725,556 2,242,974
Adjustment To PEO Compensation, Footnote
(3)
Compensation Actually Paid reflects the exclusions and inclusions of certain amounts for the PEO and the Non-PEO NEOs as set forth below. Equity values are calculated in accordance with FASB ASC Topic 718. Amounts in the Exclusion of Stock Awards and Option Awards column are the totals from the Stock Awards and Option Awards columns set forth in the Summary Compensation Table.
​ ​
Year
​ ​ ​
Summary Compensation
Table Total for PEO
($)
​ ​ ​
Exclusion of Stock
Awards and
Option Awards
for PEO
($)
​ ​ ​
Inclusion of Equity
Values for PEO
($)
​ ​ ​
Compensation Actually
Paid to PEO
($)
​ ​
​ ​
2024
​ ​ ​ ​ ​ 3,695,421 ​ ​ ​ ​ ​ ​ (2,522,729) ​ ​ ​ ​ ​ ​ 32,113,330 ​ ​ ​ ​ ​ ​ 33,286,022 ​ ​ ​
The amounts in the Inclusion of Equity Values in the tables above are derived from the amounts set forth in the following tables:
​ ​
Year
​ ​ ​
Year-End Fair Value of
Equity Awards Granted
During Year That
Remained Unvested as of
Last Day of Year for
PEO
($)
​ ​ ​
Change in Fair Value
from Last Day of Prior
Year to Last Day of
Year of Unvested
Equity Awards for
PEO
($)
​ ​ ​
Vesting-Date Fair
Value of Equity
Awards Granted
During Year that
Vested During
Year for PEO
($)
​ ​ ​
Change in Fair
Value from Last
Day of Prior Year to
Vesting Date of
Unvested Equity
Awards that Vested
During Year for
PEO
($)
​ ​ ​
Total – Inclusion
of Equity Values
for PEO
($)
​ ​
​ ​
2024
​ ​ ​ ​ ​ 9,599,146 ​ ​ ​ ​ ​ ​ 25,761,959 ​ ​ ​ ​ ​ ​ 238,772 ​ ​ ​ ​ ​ ​ (3,486,574) ​ ​ ​ ​ ​ ​ 32,113,330 ​ ​ ​
       
Non-PEO NEO Average Total Compensation Amount $ 1,160,525 1,923,067 811,490 1,251,466 899,965
Non-PEO NEO Average Compensation Actually Paid Amount $ 9,517,874 11,430,710 311,906 988,822 870,688
Adjustment to Non-PEO NEO Compensation Footnote
(3)
Compensation Actually Paid reflects the exclusions and inclusions of certain amounts for the PEO and the Non-PEO NEOs as set forth below. Equity values are calculated in accordance with FASB ASC Topic 718. Amounts in the Exclusion of Stock Awards and Option Awards column are the totals from the Stock Awards and Option Awards columns set forth in the Summary Compensation Table.
​ ​
Year
​ ​ ​
Average Summary
Compensation
Table Total for Non-PEO
NEOs
($)
​ ​ ​
Average Exclusion of Stock
Awards and Option Awards for
Non-PEO NEOs
($)
​ ​ ​
Average Inclusion of
Equity Values
for Non-PEO NEOs
($)
​ ​ ​
Average Compensation
Actually Paid to Non-PEO
NEOs
($)
​ ​
​ ​
2024
​ ​ ​ ​ ​ 1,160,525 ​ ​ ​ ​ ​ ​ (643,817) ​ ​ ​ ​ ​ ​ 9,001,166 ​ ​ ​ ​ ​ ​ 9,517,874 ​ ​ ​
The amounts in the Inclusion of Equity Values in the tables above are derived from the amounts set forth in the following tables:
​ ​
Year
​ ​ ​
Average Year-End
Fair Value of Equity
Awards Granted
During Year That
Remained Unvested
as of Last Day of
Year for Non-PEO
NEOs
($)
​ ​ ​
Average Change in
Fair Value from
Last Day of Prior
Year to Last Day of
Year of Unvested
Equity Awards for
Non-PEO NEOs
($)
​ ​ ​
Average Vesting-
Date Fair Value of
Equity Awards
Granted During
Year that Vested
During Year for
Non-PEO NEOs
($)
​ ​ ​
Average Change in
Fair Value from
Last Day of Prior
Year to Vesting
Date of Unvested
Equity Awards that
Vested During
Year for Non-PEO
NEOs
($)
​ ​ ​
Total – Average
Inclusion of
Equity Values for
Non-PEO NEOs
($)
​ ​
​ ​
2024
​ ​ ​ ​ ​ 2,449,764 ​ ​ ​ ​ ​ ​ 7,524,673 ​ ​ ​ ​ ​ ​ 60,936 ​ ​ ​ ​ ​ ​ (1,034,207) ​ ​ ​ ​ ​ ​ 9,001,166 ​ ​ ​
       
Compensation Actually Paid vs. Total Shareholder Return [MISSING IMAGE: bc_tsr-pn.jpg]        
Compensation Actually Paid vs. Net Income
[MISSING IMAGE: bc_netincome-pn.jpg]
       
Compensation Actually Paid vs. Company Selected Measure
[MISSING IMAGE: bc_gaapebitda-pn.jpg]
       
Total Shareholder Return Vs Peer Group [MISSING IMAGE: bc_tsr-pn.jpg]        
Tabular List, Table
Tabular List of Most Important Financial Performance Measures
The following table presents the financial performance measures that the Company considers to have been the most important in linking Compensation Actually Paid to our PEO and Non-PEO NEOs for 2024 to Company performance. The measures in this table are not ranked.
​ ​
Non-GAAP EBITDA
Relative TSR
​ ​
       
Total Shareholder Return Amount $ 310.27 162.63 15.91 43.27 71.63
Peer Group Total Shareholder Return Amount 123.89 102.83 109.42 169.88 137.07
Net Income (Loss) $ (194,415,000) $ (56,048,000) $ (66,397,000) $ (54,162,000) $ (58,452,000)
Company Selected Measure Amount (30,216,000) (364,000) (18,501,000) (8,413,000) (3,212,000)
PEO Name Chih-Hsiang (Thompson) Lin        
Equity Awards Adjustments, Footnote
The amounts in the Inclusion of Equity Values in the tables above are derived from the amounts set forth in the following tables:
​ ​
Year
​ ​ ​
Year-End Fair Value of
Equity Awards Granted
During Year That
Remained Unvested as of
Last Day of Year for
PEO
($)
​ ​ ​
Change in Fair Value
from Last Day of Prior
Year to Last Day of
Year of Unvested
Equity Awards for
PEO
($)
​ ​ ​
Vesting-Date Fair
Value of Equity
Awards Granted
During Year that
Vested During
Year for PEO
($)
​ ​ ​
Change in Fair
Value from Last
Day of Prior Year to
Vesting Date of
Unvested Equity
Awards that Vested
During Year for
PEO
($)
​ ​ ​
Total – Inclusion
of Equity Values
for PEO
($)
​ ​
​ ​
2024
​ ​ ​ ​ ​ 9,599,146 ​ ​ ​ ​ ​ ​ 25,761,959 ​ ​ ​ ​ ​ ​ 238,772 ​ ​ ​ ​ ​ ​ (3,486,574) ​ ​ ​ ​ ​ ​ 32,113,330 ​ ​ ​
​ ​
Year
​ ​ ​
Average Year-End
Fair Value of Equity
Awards Granted
During Year That
Remained Unvested
as of Last Day of
Year for Non-PEO
NEOs
($)
​ ​ ​
Average Change in
Fair Value from
Last Day of Prior
Year to Last Day of
Year of Unvested
Equity Awards for
Non-PEO NEOs
($)
​ ​ ​
Average Vesting-
Date Fair Value of
Equity Awards
Granted During
Year that Vested
During Year for
Non-PEO NEOs
($)
​ ​ ​
Average Change in
Fair Value from
Last Day of Prior
Year to Vesting
Date of Unvested
Equity Awards that
Vested During
Year for Non-PEO
NEOs
($)
​ ​ ​
Total – Average
Inclusion of
Equity Values for
Non-PEO NEOs
($)
​ ​
​ ​
2024
​ ​ ​ ​ ​ 2,449,764 ​ ​ ​ ​ ​ ​ 7,524,673 ​ ​ ​ ​ ​ ​ 60,936 ​ ​ ​ ​ ​ ​ (1,034,207) ​ ​ ​ ​ ​ ​ 9,001,166 ​ ​ ​
       
Pervious Peer Group Total Shareholder Return Amount $ 156.26 $ 178.88 $ 178.07 $ 215.25 $ 142.68
Measure:: 1          
Pay vs Performance Disclosure          
Name Non-GAAP EBITDA        
Non-GAAP Measure Description
(5)
We determined Non-GAAP EBITDA to be the most important financial performance measure used to link Company performance to Compensation Actually Paid to our PEO and Non-PEO NEOs in 2024. A definition of Non-GAAP EBITDA is provided in the Compensation Discussion and Analysis section of this Proxy Statement, and a reconciliation of Non-GAAP EBITDA to GAAP is attached to this Proxy Statement as Appendix A.
       
Measure:: 2          
Pay vs Performance Disclosure          
Name Relative TSR        
PEO | Equity Awards Adjustments          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount $ 32,113,330        
PEO | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 9,599,146        
PEO | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 25,761,959        
PEO | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 238,772        
PEO | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount (3,486,574)        
PEO | Exclusion of Stock Awards and Option Awards [Member]          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount (2,522,729)        
Non-PEO NEO | Equity Awards Adjustments          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 9,001,166        
Non-PEO NEO | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 2,449,764        
Non-PEO NEO | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 7,524,673        
Non-PEO NEO | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 60,936        
Non-PEO NEO | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount (1,034,207)        
Non-PEO NEO | Exclusion of Stock Awards and Option Awards [Member]          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount $ (643,817)