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Pay vs Performance Disclosure - USD ($)
 2 Months Ended 10 Months Ended 12 Months Ended
Jan. 15, 2024
Dec. 31, 2023
Oct. 29, 2023
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Pay vs Performance Disclosure              
Pay vs Performance Disclosure, Table      
Pay-Versus-Performance
Our Compensation Committee approves and administers our executive compensation program to align executive compensation with stockholder interests by linking pay to performance. Our overall compensation program includes a mix of short-term and long-term components through our annual incentive plan and equity awards. As required by Item 402(v) of Regulation S-K, we are providing the following information about the relationship between the compensation actually paid to our named executive officers and certain aspects of our financial performance. We are a smaller reporting company pursuant to Rule 405 of the Securities Act of 1933, as amended, and, as such, are only required to include information for the past three fiscal years in the table below.
Pay-Versus-Performance Table
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Year
 
 
Summary
Compensation
Table Total
for
PEO #1
(Han Ying)
($)(1)
 
 
Summary
Compensation
Table Total
for
PEO #2
(Charles Wu)
($)(1)
 
 
Summary
Compensation
Table Total
for
PEO # 3
(Songjiang Ma)
($)(1)
 
 
Compensation
Actually Paid
to
PEO #1
(Han Ying)
($)(2)
 
 
Compensation
Actually Paid
to
PEO #2
(Charles Wu)
($)(2)
 
 
Compensation
Actually Paid
to PEO #3
(Songjiang Ma)
($)(2)
 
 
Average
Summary
Compensation
Table Total
for
Non-PEO
NEOs ($)(3)
 
 
Average
Compensation
Actually Paid
to
Non-PEO
NEOs ($)(4)
 
 
Total
Stockholder
Return
Based on
Initial Fixed
$100
Investment
($)(5)
 
 
Net
Income
(in thousands)
($)(6)
2024
 
 
2,888,140
 
 
15,350
 
 
N/A
 
 
3,673,377
 
 
15,350
 
 
N/A
 
 
491,568
 
 
548,481
 
 
134
 
 
17,898
2023
 
 
N/A
 
 
$106,152
 
 
103,027
 
 
N/A
 
 
1,178,682
 
 
28,487,290
 
 
241,389
 
 
7,309,307
 
 
398
 
 
(85,480)
2022
 
 
N/A
 
 
N/A
 
 
136,352
 
 
N/A
 
 
N/A
 
 
(199,434)
 
 
263,771
 
 
186,631
 
 
0
 
 
4,314
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(1)
During years 2022 through 2024, the following individuals served as “principal executive officer” during the time periods set forth below:
 
 
 
 
Name
 
 
Dates as PEO During Years 2022 through 2024
Songjiang Ma
 
 
January 1, 2022 through October 29, 2023
Charles Wu, Ph.D.
 
 
October 30, 2023 through January 15, 2024
Han Ying, Ph.D.
 
 
January 15, 2024 through December 31, 2024
 
 
 
 
The dollar amounts reported in these columns represent the amount of total compensation reported for each of Dr. Ying, Dr. Wu and Mr. Ma (collectively, our “PEOs”) for each covered fiscal year in the “Total” column of the Summary Compensation Table for each applicable year.
(2)
The dollar amounts reported in these columns represent the amount of “compensation actually paid” to our PEOs, as computed in accordance with Item 402(v) of Regulation S-K, for each covered fiscal year. In accordance with these rules, these amounts reflect total compensation as set forth in the Summary Compensation Table for each year, adjusted as shown below for 2024. Equity values are calculated in accordance with FASB ASC Topic 718, and the valuation assumptions used to calculate fair values did not materially differ from those disclosed at the time of grant. The dollar amounts do not reflect the actual amount of compensation earned or received by or paid to the PEOs during the applicable fiscal year.
 
 
 
 
 
 
 
 
 
 
Dr. Ying 2024
 
 
Dr. Wu 2024
Summary Compensation Table Total
 
 
$2,888,140
 
 
$15,350
Less, value of “Option Awards” reported in Summary Compensation Table
 
 
$2,503,401
 
 
—
Plus, year-end fair value of outstanding and unvested equity awards granted in the year
 
 
$3,281,326
 
 
—
Plus, fair value as of vesting date of equity awards granted and vested in the year
 
 
$7,312
 
 
—
Plus (less), year over year change in fair value of outstanding and unvested equity awards granted in prior years
 
 
—
 
 
—
Plus (less), change in fair value from last day of prior fiscal year to vesting date for equity awards granted in prior years that vested in the year
 
 
—
 
 
—
Less, prior year-end fair value for any equity awards forfeited in the year
 
 
—
 
 
—
Compensation Actually Paid to PEOs
 
 
$3,673,377
 
 
$15,350
 
 
 
 
 
 
 
(3)
The dollar amounts reported in this column represent the average amount of total compensation report for our NEOs as a group (excluding our PEOs) for each covered fiscal year in the “Total” column of the Summary Compensation Table for each applicable year. Please refer to “Executive Compensation—Summary Compensation Table” above. The names of each NEO included for these purposes in each applicable year are as follows: (i) for 2024 and 2023, Ruoyu Chen and Weiguo Ye, and (ii) for 2022, Weiguo Ye and Lin Han.
(4)
The dollar amounts reported in these columns represent the amount of “compensation actually paid” to our NEOs as a group (excluding our PEOs), as computed in accordance with Item 402(v) of Regulation S-K, for each covered fiscal year. In accordance with these rules, these amounts reflect total compensation as set forth in the Summary Compensation Table for each year, adjusted as shown
below for 2024. Equity values are calculated in accordance with FASB ASC Topic 718, and the valuation assumptions used to calculate fair values did not materially differ from those disclosed at the time of grant. The dollar amounts do not reflect the actual amount of compensation earned or received by or paid to the NEOs as a group (excluding our PEOs) during the applicable fiscal year.
 
 
 
 
 
 
 
2024
Average Summary Compensation Table Total
 
 
$491,568
Less, average value of “Option Awards” reported in Summary Compensation Table
 
 
$182,758
Plus, average year-end fair value of outstanding and unvested equity awards granted in the year
 
 
$239,672
Plus, average fair value as of vesting date of equity awards granted and vested in the year
 
 
—
Plus (less), average year over year change in fair value of outstanding and unvested equity awards granted in prior years
 
 
—
Plus (less), average change in fair value from last day of prior fiscal year to vesting date for equity awards granted in prior years that vested in the year
 
 
—
Less, average prior year-end fair value for any equity awards forfeited in the year
 
 
—
Average Compensation Actually Paid to Non-PEO NEOs
 
 
$548,481
 
 
 
 
(5)
Cumulative total stockholder return (“TSR”) is calculated by dividing (a) the sum of (i) the cumulative amount of dividends during the measurement period, assuming dividend reinvestment, and (ii) the difference between our stock price at the end of the applicable measurement period and the beginning of the measurement period by (b) our stock price at the beginning of the measurement period. The beginning of the measurement period for each year in the table is December 31, 2021.
(6)
The dollar amounts reported represent the amount of net income (loss) reflected in our audited financial statements for each covered fiscal year.
     
Named Executive Officers, Footnote      
(1)
During years 2022 through 2024, the following individuals served as “principal executive officer” during the time periods set forth below:
 
 
 
 
Name
 
 
Dates as PEO During Years 2022 through 2024
Songjiang Ma
 
 
January 1, 2022 through October 29, 2023
Charles Wu, Ph.D.
 
 
October 30, 2023 through January 15, 2024
Han Ying, Ph.D.
 
 
January 15, 2024 through December 31, 2024
 
 
 
 
The dollar amounts reported in these columns represent the amount of total compensation reported for each of Dr. Ying, Dr. Wu and Mr. Ma (collectively, our “PEOs”) for each covered fiscal year in the “Total” column of the Summary Compensation Table for each applicable year.
(3)
The dollar amounts reported in this column represent the average amount of total compensation report for our NEOs as a group (excluding our PEOs) for each covered fiscal year in the “Total” column of the Summary Compensation Table for each applicable year. Please refer to “Executive Compensation—Summary Compensation Table” above. The names of each NEO included for these purposes in each applicable year are as follows: (i) for 2024 and 2023, Ruoyu Chen and Weiguo Ye, and (ii) for 2022, Weiguo Ye and Lin Han.
     
Adjustment To PEO Compensation, Footnote      
(2)
The dollar amounts reported in these columns represent the amount of “compensation actually paid” to our PEOs, as computed in accordance with Item 402(v) of Regulation S-K, for each covered fiscal year. In accordance with these rules, these amounts reflect total compensation as set forth in the Summary Compensation Table for each year, adjusted as shown below for 2024. Equity values are calculated in accordance with FASB ASC Topic 718, and the valuation assumptions used to calculate fair values did not materially differ from those disclosed at the time of grant. The dollar amounts do not reflect the actual amount of compensation earned or received by or paid to the PEOs during the applicable fiscal year.
 
 
 
 
 
 
 
 
 
 
Dr. Ying 2024
 
 
Dr. Wu 2024
Summary Compensation Table Total
 
 
$2,888,140
 
 
$15,350
Less, value of “Option Awards” reported in Summary Compensation Table
 
 
$2,503,401
 
 
—
Plus, year-end fair value of outstanding and unvested equity awards granted in the year
 
 
$3,281,326
 
 
—
Plus, fair value as of vesting date of equity awards granted and vested in the year
 
 
$7,312
 
 
—
Plus (less), year over year change in fair value of outstanding and unvested equity awards granted in prior years
 
 
—
 
 
—
Plus (less), change in fair value from last day of prior fiscal year to vesting date for equity awards granted in prior years that vested in the year
 
 
—
 
 
—
Less, prior year-end fair value for any equity awards forfeited in the year
 
 
—
 
 
—
Compensation Actually Paid to PEOs
 
 
$3,673,377
 
 
$15,350
 
 
 
 
 
 
 
      
Non-PEO NEO Average Total Compensation Amount       $ 491,568   $ 241,389 $ 263,771
Non-PEO NEO Average Compensation Actually Paid Amount       $ 548,481   7,309,307 186,631
Adjustment to Non-PEO NEO Compensation Footnote      
(4)
The dollar amounts reported in these columns represent the amount of “compensation actually paid” to our NEOs as a group (excluding our PEOs), as computed in accordance with Item 402(v) of Regulation S-K, for each covered fiscal year. In accordance with these rules, these amounts reflect total compensation as set forth in the Summary Compensation Table for each year, adjusted as shown
below for 2024. Equity values are calculated in accordance with FASB ASC Topic 718, and the valuation assumptions used to calculate fair values did not materially differ from those disclosed at the time of grant. The dollar amounts do not reflect the actual amount of compensation earned or received by or paid to the NEOs as a group (excluding our PEOs) during the applicable fiscal year.
 
 
 
 
 
 
 
2024
Average Summary Compensation Table Total
 
 
$491,568
Less, average value of “Option Awards” reported in Summary Compensation Table
 
 
$182,758
Plus, average year-end fair value of outstanding and unvested equity awards granted in the year
 
 
$239,672
Plus, average fair value as of vesting date of equity awards granted and vested in the year
 
 
—
Plus (less), average year over year change in fair value of outstanding and unvested equity awards granted in prior years
 
 
—
Plus (less), average change in fair value from last day of prior fiscal year to vesting date for equity awards granted in prior years that vested in the year
 
 
—
Less, average prior year-end fair value for any equity awards forfeited in the year
 
 
—
Average Compensation Actually Paid to Non-PEO NEOs
 
 
$548,481
 
 
 
 
      
Compensation Actually Paid vs. Total Shareholder Return      
Compensation Actually Paid and Company TSR
The following graph displays the compensation actually paid to our NEOs compared to our TSR.
     
Compensation Actually Paid vs. Net Income      
Compensation Actually Paid and Net Income
The following graph displays our compensation actually paid compared to our net income.
      
Total Shareholder Return Amount       $ 134   398 $ 0
PEO Name Charles Wu, Ph.D. Charles Wu, Ph.D. Songjiang Ma   Han Ying, Ph.D.   Songjiang Ma
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest       17,898,000   (85,480,000) $ 4,314,000
Han Ying, Ph.D. [Member]              
Pay vs Performance Disclosure              
PEO Total Compensation Amount       2,888,140      
PEO Actually Paid Compensation Amount       3,673,377      
Charles Wu, Ph.D. [Member]              
Pay vs Performance Disclosure              
PEO Total Compensation Amount       15,350   106,152  
PEO Actually Paid Compensation Amount       15,350   1,178,682  
Songjiang Ma [Member]              
Pay vs Performance Disclosure              
PEO Total Compensation Amount           103,027 136,352
PEO Actually Paid Compensation Amount           $ 28,487,290 $ (199,434)
PEO | Han Ying, Ph.D. [Member] | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table              
Pay vs Performance Disclosure              
Adjustment to Compensation, Amount       (2,503,401)      
PEO | Han Ying, Ph.D. [Member] | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested              
Pay vs Performance Disclosure              
Adjustment to Compensation, Amount       3,281,326      
PEO | Han Ying, Ph.D. [Member] | 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       0      
PEO | Han Ying, Ph.D. [Member] | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year              
Pay vs Performance Disclosure              
Adjustment to Compensation, Amount       7,312      
PEO | Han Ying, Ph.D. [Member] | 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       0      
PEO | Han Ying, Ph.D. [Member] | Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year              
Pay vs Performance Disclosure              
Adjustment to Compensation, Amount       0      
PEO | Charles Wu, Ph.D. [Member] | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table              
Pay vs Performance Disclosure              
Adjustment to Compensation, Amount       0      
PEO | Charles Wu, Ph.D. [Member] | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested              
Pay vs Performance Disclosure              
Adjustment to Compensation, Amount       0      
PEO | Charles Wu, Ph.D. [Member] | 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       0      
PEO | Charles Wu, Ph.D. [Member] | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year              
Pay vs Performance Disclosure              
Adjustment to Compensation, Amount       0      
PEO | Charles Wu, Ph.D. [Member] | 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       0      
PEO | Charles Wu, Ph.D. [Member] | Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year              
Pay vs Performance Disclosure              
Adjustment to Compensation, Amount       0      
Non-PEO NEO | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table              
Pay vs Performance Disclosure              
Adjustment to Compensation, Amount       (182,758)      
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       239,672      
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       0      
Non-PEO NEO | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year              
Pay vs Performance Disclosure              
Adjustment to Compensation, Amount       0      
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       0      
Non-PEO NEO | Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year              
Pay vs Performance Disclosure              
Adjustment to Compensation, Amount       $ 0