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Pay vs Performance Disclosure pure in Millions | 12 Months Ended
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Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Pay vs Performance Disclosure |  |  |  |
Pay vs Performance Disclosure, Table | PAY V. PERFORMANCE Below is the disclosure of the compensation of the Company’s Principal Executive Officers (“PEOs”) and as an average for all of our other named executive officers (“Non-PEO NEOs”) for the last four fiscal years calculated in accordance with the recently adopted Item 402(v) of Regulation S-K. Item 402(v). The table below also shows (i) the Company’s cumulative total stockholder return (or “TSR”), (ii) the TSR of the S&P 500 Healthcare Index, which we have used as our peer group for purposes of disclosure in the table below, (iii) the Company’s net income for the applicable fiscal year, and (iv) the Company’s performance with respect to a “company-selected measure” ​(or “CSM”) which in our assessment represents the single most important financial performance metric used to link compensation actually paid to our named executive officers for the most recently completed fiscal year to the Company’s performance. We selected Adjusted EBITDA as the CSM required for disclosure in the table below.
​ | Year | ​ | ​ | SCT Total For PEO | ​ | ​ | Compensation Actually Paid (“CAP”) to PEO | ​ | ​ | ​ | SCT Total For PEO | ​ | ​ | CAP to PEO | ​ | ​ | ​ | SCT Total For PEO | ​ | ​ | CAP to PEO | ​ | ​ | Average SCT Total For Non- PEO NEOs(3) | ​ | ​ | Average CAP To Non- PEO NEOs(2)(3) | ​ | ​ | Value of Initial Fixed $100 Investment Based on TSR of: | ​ | ​ | ​ | Net Income | ​ | ​ | Adjusted EBITDA(6) | ​
​ | Thomas S. Lam, M.D., M.P.H(1)(2) | ​ | ​ | ​ | Brandon K. Sim, M.S.(1)(2) | ​ | ​ | ​ | Kenneth Sim, M.D.(1)(2) | ​ | ​ | ASTH(4) | ​ | ​ | ​ | S&P 500 Healthcare Index(4)(5) | ​ | ​ | ​ | (In millions) | ​
​ | 2023 | ​ | ​ | ​ | $ | 5,217,562 | ​ | ​ | ​ | ​ | $ | 4,314,127 | ​ | ​ | ​ | ​ | ​ | $ | 14,311,250 | ​ | ​ | ​ | ​ | $ | 13,561,755 | ​ | ​ | ​ | ​ | ​ | $ | — | ​ | ​ | ​ | ​ | $ | — | ​ | ​ | ​ | ​ | $ | 3,827,960 | ​ | ​ | ​ | ​ | $ | 3,356,039 | ​ | ​ | ​ | ​ | $ | 208 | ​ | ​ | ​ | ​ | ​ | $ | 143 | ​ | ​ | ​ | ​ | ​ | $ | 58 | ​ | ​ | ​ | ​ | $ | 147 | ​ | ​
​ | 2022 | ​ | ​ | ​ | $ | 1,487,709 | ​ | ​ | ​ | ​ | $ | (5,920,199) | ​ | ​ | ​ | ​ | ​ | $ | 15,302,775 | ​ | ​ | ​ | ​ | $ | 997,261 | ​ | ​ | ​ | ​ | ​ | $ | — | ​ | ​ | ​ | ​ | $ | — | ​ | ​ | ​ | ​ | $ | 1,667,352 | ​ | ​ | ​ | ​ | $ | (574,925) | ​ | ​ | ​ | ​ | $ | 161 | ​ | ​ | ​ | ​ | ​ | $ | 140 | ​ | ​ | ​ | ​ | ​ | $ | 46 | ​ | ​ | ​ | ​ | $ | 140 | ​ | ​
​ | 2021 | ​ | ​ | ​ | $ | 6,857,194 | ​ | ​ | ​ | ​ | $ | 16,090,110 | ​ | ​ | ​ | ​ | ​ | $ | 9,006,157 | ​ | ​ | ​ | ​ | $ | 15,536,119 | ​ | ​ | ​ | ​ | ​ | $ | 6,863,527 | ​ | ​ | ​ | ​ | $ | 16,096,441 | ​ | ​ | ​ | ​ | $ | 688,309 | ​ | ​ | ​ | ​ | $ | 1,155,454 | ​ | ​ | ​ | ​ | $ | 399 | ​ | ​ | ​ | ​ | ​ | $ | 143 | ​ | ​ | ​ | ​ | ​ | $ | 46 | ​ | ​ | ​ | ​ | $ | 134 | ​ | ​
​ | 2020 | ​ | ​ | ​ | $ | 2,515,142 | ​ | ​ | ​ | ​ | $ | 2,412,546 | ​ | ​ | ​ | ​ | ​ | $ | — | ​ | ​ | ​ | ​ | $ | — | ​ | ​ | ​ | ​ | ​ | $ | 2,521,773 | ​ | ​ | ​ | ​ | $ | 2,419,178 | ​ | ​ | ​ | ​ | $ | 685,422 | ​ | ​ | ​ | ​ | $ | 695,307 | ​ | ​ | ​ | ​ | $ | 99 | ​ | ​ | ​ | ​ | ​ | $ | 113 | ​ | ​ | ​ | ​ | ​ | $ | 122 | ​ | ​ | ​ | ​ | $ | 103 | ​ | ​
​ (1) The PEOs shown in the table above for each applicable fiscal year are as follows: ​
​ | Year | ​ | ​ | PEOs | ​
​ | 2023 | ​ | ​ | Thomas Lam, M.D., M.P.H and Brandon K. Sim, M.S. | ​
​ | 2022 | ​ | ​ | Thomas Lam, M.D., M.P.H and Brandon K. Sim, M.S. | ​
​ | 2021 | ​ | ​ | Kenneth Sim, M.D., Thomas Lam, M.D., M.P.H and Brandon K. Sim, M.S. | ​
​ | 2020 | ​ | ​ | Kenneth Sim, M.D. and Thomas Lam, M.D., M.P.H | ​
​ (2) As the valuation methods for compensation actually paid (“CAP”) required by the SEC differ from those required in the Summary Compensation Table (“SCT”), the table below provides a reconciliation of the SCT amounts to the CAP amounts in the Pay Versus Performance table for the PEOs and Non-PEO NEOs for each of the last four fiscal years. ​ (3) The Non-PEO NEOs shown in the table above for each applicable fiscal year are as follows: ​
​ | Year | ​ | ​ | Non-PEO NEOs | ​
​ | 2023 | ​ | ​ | Kenneth Sim, M.D., Chandan Basho, M.B.A., and Albert Young, M.D., M.P.H. | ​
​ | 2022 | ​ | ​ | Kenneth Sim, M.D., Chandan Basho, M.B.A., Albert Young, M.D., M.P.H., and Eric Chin | ​
​ | 2021 | ​ | ​ | Eric Chin and Albert Young, M.D., M.P.H. | ​
​ | 2020 | ​ | ​ | Eric Chin, Brandon K. Sim M.S., Adrian Vazquez, M.D., and Albert Young, M.D., M.P.H. | ​
​ (4) Pursuant to the SEC rules, total stockholder return, or TSR, reflects an initial investment of $100 on December 31, 2019. ​ (5) The peer group of the listed fiscal year consists of the S&P 500 Healthcare Index. ​ (6) The company selected measure is Adjusted EBITDA. ​ Summary Compensation Table to Compensation Actually Paid Reconciliation Table
​ | ​ | ​ | ​ | PEO #1 Thomas S. Lam, M.D., M.P.H. | ​
​ | ​ | ​ | ​ | 2023 | ​ | ​ | 2022 | ​ | ​ | 2021 | ​ | ​ | 2020 | ​
​ | Total Reported in Summary Compensation Table (SCT) | ​ | ​ | ​ | $ | 5,217,562 | ​ | ​ | ​ | ​ | $ | 1,487,709 | ​ | ​ | ​ | ​ | $ | 6,857,194 | ​ | ​ | ​ | ​ | $ | 2,515,142 | ​ | ​
​ | Less, Value of Stock & Option Awards Reported in SCT(1) | ​ | ​ | ​ | ​ | (3,253,500) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | (5,777,307) | ​ | ​ | ​ | ​ | ​ | (1,450,003) | ​ | ​
​ | Plus, Year-End Value of Awards Granted in Fiscal Year That Are Unvested and Outstanding | ​ | ​ | ​ | ​ | 2,298,000 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 5,875,821 | ​ | ​ | ​ | ​ | ​ | 1,486,990 | ​ | ​
​ | Plus, Change in Fair Value of Prior Year Awards That Are Outstanding and Unvested | ​ | ​ | ​ | ​ | 171,330 | ​ | ​ | ​ | ​ | ​ | (3,852,379) | ​ | ​ | ​ | ​ | ​ | 4,920,552 | ​ | ​ | ​ | ​ | ​ | (67,429) | ​ | ​
​ | Plus, FMV of Awards Granted this Year That Vested this Year | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | Plus, Change in Fair Value (from Prior Year-End) of Prior Year awards That Vested this year | ​ | ​ | ​ | ​ | (119,265) | ​ | ​ | ​ | ​ | ​ | (3,555,529) | ​ | ​ | ​ | ​ | ​ | 4,213,850 | ​ | ​ | ​ | ​ | ​ | (72,154) | ​ | ​
​ | Less, Prior Year Fair Value of Prior Year awards That Failed to Vest this year | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | Plus, Dividends or Earnings Paid on Awards not Otherwise Reflected in Fair Value | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Compensation Actually Paid | ​ | ​ | ​ | $ | 4,314,127 | ​ | ​ | ​ | ​ | $ | (5,920,199) | ​ | ​ | ​ | ​ | $ | 16,090,110 | ​ | ​ | ​ | ​ | $ | 2,412,546 | ​ | ​
​ | ​ | ​ | ​ | PEO #2 Brandon K. Sim, M.S. | ​
​ | ​ | ​ | ​ | 2023 | ​ | ​ | 2022 | ​ | ​ | 2021 | ​
​ | Total Reported in Summary Compensation Table (SCT) | ​ | ​ | ​ | $ | 14,311,250 | ​ | ​ | ​ | ​ | $ | 15,302,775 | ​ | ​ | ​ | ​ | $ | 9,006,157 | ​ | ​
​ | Less, Value of Stock & Option Awards Reported in SCT(1) | ​ | ​ | ​ | ​ | (12,499,943) | ​ | ​ | ​ | ​ | ​ | (13,567,843) | ​ | ​ | ​ | ​ | ​ | (7,816,831) | ​ | ​
​ | Plus, Year-End Value of Awards Granted in Fiscal Year That Are Unvested and Outstanding | ​ | ​ | ​ | ​ | 9,243,092 | ​ | ​ | ​ | ​ | ​ | 6,778,744 | ​ | ​ | ​ | ​ | ​ | 13,976,639 | ​ | ​
​ | Plus, Change in Fair Value of Prior Year Awards That Are Outstanding and Unvested | ​ | ​ | ​ | ​ | 1,821,347 | ​ | ​ | ​ | ​ | ​ | (5,032,202) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | Plus, FMV of Awards Granted this Year That Vested this Year | ​ | ​ | ​ | ​ | 527,597 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | Plus, Change in Fair Value (from Prior Year-End) of Prior Year awards That Vested this year | ​ | ​ | ​ | ​ | 158,412 | ​ | ​ | ​ | ​ | ​ | (2,484,213) | ​ | ​ | ​ | ​ | ​ | 370,154 | ​ | ​
​ | Less, Prior Year Fair Value of Prior Year awards That Failed to Vest this year | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | Plus, Dividends or Earnings Paid on Awards not Otherwise Reflected in Fair Value | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Compensation Actually Paid | ​ | ​ | ​ | $ | 13,561,755 | ​ | ​ | ​ | ​ | $ | 997,261 | ​ | ​ | ​ | ​ | $ | 15,536,119 | ​ | ​
​ | ​ | ​ | ​ | PEO #3 Kenneth Sim, M.D. | ​
​ | ​ | ​ | ​ | 2021 | ​ | ​ | 2020 | ​
​ | Total Reported in Summary Compensation Table (SCT) | ​ | ​ | ​ | $ | 6,863,527 | ​ | ​ | ​ | ​ | $ | 2,521,773 | ​ | ​
​ | Less, Value of Stock & Option Awards Reported in SCT(1) | ​ | ​ | ​ | ​ | (5,777,307) | ​ | ​ | ​ | ​ | ​ | (1,450,003) | ​ | ​
​ | Plus, Year-End Value of Awards Granted in Fiscal Year That Are Unvested and Outstanding | ​ | ​ | ​ | ​ | 5,875,819 | ​ | ​ | ​ | ​ | ​ | 1,486,991 | ​ | ​
​ | Plus, Change in Fair Value of Prior Year Awards That Are Outstanding and Unvested | ​ | ​ | ​ | ​ | 4,920,552 | ​ | ​ | ​ | ​ | ​ | (67,429) | ​ | ​
​ | Plus, FMV of Awards Granted this Year That Vested this Year | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | Plus, Change in Fair Value (from Prior Year-End) of Prior Year awards That Vested this year | ​ | ​ | ​ | ​ | 4,213,850 | ​ | ​ | ​ | ​ | ​ | (72,154) | ​ | ​
​ | Less, Prior Year Fair Value of Prior Year awards That Failed to Vest this year | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | Plus, Dividends or Earnings Paid on Awards not Otherwise Reflected in Fair Value | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Compensation Actually Paid | ​ | ​ | ​ | $ | 16,096,441 | ​ | ​ | ​ | ​ | $ | 2,419,178 | ​ | ​
​ | ​ | ​ | ​ | Average NEOs | ​
​ | ​ | ​ | ​ | 2023 | ​ | ​ | 2022 | ​ | ​ | 2021 | ​ | ​ | 2020 | ​
​ | Total Reported in Summary Compensation Table (SCT) | ​ | ​ | ​ | $ | 3,827,960 | ​ | ​ | ​ | ​ | $ | 1,667,352 | ​ | ​ | ​ | ​ | $ | 688,309 | ​ | ​ | ​ | ​ | $ | 685,422 | ​ | ​
​ | Less, Value of Stock & Option Awards Reported in SCT(1) | ​ | ​ | ​ | ​ | (2,617,300) | ​ | ​ | ​ | ​ | ​ | (880,452) | ​ | ​ | ​ | ​ | ​ | (205,730) | ​ | ​ | ​ | ​ | ​ | (204,895) | ​ | ​
​ | Plus, Year-End Value of Awards Granted in Fiscal Year That Are Unvested and Outstanding | ​ | ​ | ​ | ​ | 1,818,867 | ​ | ​ | ​ | ​ | ​ | 524,690 | ​ | ​ | ​ | ​ | ​ | 652,802 | ​ | ​ | ​ | ​ | ​ | 107,514 | ​ | ​
​ | Plus, Change in Fair Value of Prior Year Awards That Are Outstanding and Unvested | ​ | ​ | ​ | ​ | 180,624 | ​ | ​ | ​ | ​ | ​ | (956,215) | ​ | ​ | ​ | ​ | ​ | 17,308 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | Plus, FMV of Awards Granted this Year That Vested this Year | ​ | ​ | ​ | ​ | 155,544 | ​ | ​ | ​ | ​ | ​ | 77,967 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 107,266 | ​ | ​
​ | Plus, Change in Fair Value (from Prior Year-End) of Prior Year awards That Vested this year | ​ | ​ | ​ | ​ | (9,656) | ​ | ​ | ​ | ​ | ​ | (1,008,267) | ​ | ​ | ​ | ​ | ​ | 2,765 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | Less, Prior Year Fair Value of Prior Year awards That Failed to Vest this year | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | Plus, Dividends or Earnings Paid on Awards not Otherwise Reflected in Fair Value | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Compensation Actually Paid | ​ | ​ | ​ | $ | 3,356,039 | ​ | ​ | ​ | ​ | $ | (574,925) | ​ | ​ | ​ | ​ | $ | 1,155,454 | ​ | ​ | ​ | ​ | $ | 695,307 | ​ | ​
​ (1) Stock option fair values are calculated at each measurement date using a Black-Scholes valuation model, consistent with the approach used to value the awards at the grant date. Stock option fair values as of each measurement date were determined using updated assumptions (the closing stock price of our Common Stock as of the measurement date, risk-free interest rate, expected life, expected volatility of the price of our Common Stock, and expected dividend yield) and fair value increases are primarily driven by an increase in the price of the Company’s Common Stock. ​ |  |  |
Company Selected Measure Name | Adjusted EBITDA |  |  |
Named Executive Officers, Footnote | (1) The PEOs shown in the table above for each applicable fiscal year are as follows: ​
​ | Year | ​ | ​ | PEOs | ​
​ | 2023 | ​ | ​ | Thomas Lam, M.D., M.P.H and Brandon K. Sim, M.S. | ​
​ | 2022 | ​ | ​ | Thomas Lam, M.D., M.P.H and Brandon K. Sim, M.S. | ​
​ | 2021 | ​ | ​ | Kenneth Sim, M.D., Thomas Lam, M.D., M.P.H and Brandon K. Sim, M.S. | ​
​ | 2020 | ​ | ​ | Kenneth Sim, M.D. and Thomas Lam, M.D., M.P.H | ​
Peer Group Issuers, Footnote | (5) The peer group of the listed fiscal year consists of the S&P 500 Healthcare Index. |  |  |
Adjustment To PEO Compensation, Footnote | (1) The PEOs shown in the table above for each applicable fiscal year are as follows: ​
​ | Year | ​ | ​ | PEOs | ​
​ | 2023 | ​ | ​ | Thomas Lam, M.D., M.P.H and Brandon K. Sim, M.S. | ​
​ | 2022 | ​ | ​ | Thomas Lam, M.D., M.P.H and Brandon K. Sim, M.S. | ​
​ | 2021 | ​ | ​ | Kenneth Sim, M.D., Thomas Lam, M.D., M.P.H and Brandon K. Sim, M.S. | ​
​ | 2020 | ​ | ​ | Kenneth Sim, M.D. and Thomas Lam, M.D., M.P.H | ​
Summary Compensation Table to Compensation Actually Paid Reconciliation Table
​ | ​ | ​ | ​ | PEO #1 Thomas S. Lam, M.D., M.P.H. | ​
​ | ​ | ​ | ​ | 2023 | ​ | ​ | 2022 | ​ | ​ | 2021 | ​ | ​ | 2020 | ​
​ | Total Reported in Summary Compensation Table (SCT) | ​ | ​ | ​ | $ | 5,217,562 | ​ | ​ | ​ | ​ | $ | 1,487,709 | ​ | ​ | ​ | ​ | $ | 6,857,194 | ​ | ​ | ​ | ​ | $ | 2,515,142 | ​ | ​
​ | Less, Value of Stock & Option Awards Reported in SCT(1) | ​ | ​ | ​ | ​ | (3,253,500) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | (5,777,307) | ​ | ​ | ​ | ​ | ​ | (1,450,003) | ​ | ​
​ | Plus, Year-End Value of Awards Granted in Fiscal Year That Are Unvested and Outstanding | ​ | ​ | ​ | ​ | 2,298,000 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 5,875,821 | ​ | ​ | ​ | ​ | ​ | 1,486,990 | ​ | ​
​ | Plus, Change in Fair Value of Prior Year Awards That Are Outstanding and Unvested | ​ | ​ | ​ | ​ | 171,330 | ​ | ​ | ​ | ​ | ​ | (3,852,379) | ​ | ​ | ​ | ​ | ​ | 4,920,552 | ​ | ​ | ​ | ​ | ​ | (67,429) | ​ | ​
​ | Plus, FMV of Awards Granted this Year That Vested this Year | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | Plus, Change in Fair Value (from Prior Year-End) of Prior Year awards That Vested this year | ​ | ​ | ​ | ​ | (119,265) | ​ | ​ | ​ | ​ | ​ | (3,555,529) | ​ | ​ | ​ | ​ | ​ | 4,213,850 | ​ | ​ | ​ | ​ | ​ | (72,154) | ​ | ​
​ | Less, Prior Year Fair Value of Prior Year awards That Failed to Vest this year | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | Plus, Dividends or Earnings Paid on Awards not Otherwise Reflected in Fair Value | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Compensation Actually Paid | ​ | ​ | ​ | $ | 4,314,127 | ​ | ​ | ​ | ​ | $ | (5,920,199) | ​ | ​ | ​ | ​ | $ | 16,090,110 | ​ | ​ | ​ | ​ | $ | 2,412,546 | ​ | ​
​ | ​ | ​ | ​ | PEO #2 Brandon K. Sim, M.S. | ​
​ | ​ | ​ | ​ | 2023 | ​ | ​ | 2022 | ​ | ​ | 2021 | ​
​ | Total Reported in Summary Compensation Table (SCT) | ​ | ​ | ​ | $ | 14,311,250 | ​ | ​ | ​ | ​ | $ | 15,302,775 | ​ | ​ | ​ | ​ | $ | 9,006,157 | ​ | ​
​ | Less, Value of Stock & Option Awards Reported in SCT(1) | ​ | ​ | ​ | ​ | (12,499,943) | ​ | ​ | ​ | ​ | ​ | (13,567,843) | ​ | ​ | ​ | ​ | ​ | (7,816,831) | ​ | ​
​ | Plus, Year-End Value of Awards Granted in Fiscal Year That Are Unvested and Outstanding | ​ | ​ | ​ | ​ | 9,243,092 | ​ | ​ | ​ | ​ | ​ | 6,778,744 | ​ | ​ | ​ | ​ | ​ | 13,976,639 | ​ | ​
​ | Plus, Change in Fair Value of Prior Year Awards That Are Outstanding and Unvested | ​ | ​ | ​ | ​ | 1,821,347 | ​ | ​ | ​ | ​ | ​ | (5,032,202) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | Plus, FMV of Awards Granted this Year That Vested this Year | ​ | ​ | ​ | ​ | 527,597 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | Plus, Change in Fair Value (from Prior Year-End) of Prior Year awards That Vested this year | ​ | ​ | ​ | ​ | 158,412 | ​ | ​ | ​ | ​ | ​ | (2,484,213) | ​ | ​ | ​ | ​ | ​ | 370,154 | ​ | ​
​ | Less, Prior Year Fair Value of Prior Year awards That Failed to Vest this year | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | Plus, Dividends or Earnings Paid on Awards not Otherwise Reflected in Fair Value | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Compensation Actually Paid | ​ | ​ | ​ | $ | 13,561,755 | ​ | ​ | ​ | ​ | $ | 997,261 | ​ | ​ | ​ | ​ | $ | 15,536,119 | ​ | ​
​ | ​ | ​ | ​ | PEO #3 Kenneth Sim, M.D. | ​
​ | ​ | ​ | ​ | 2021 | ​ | ​ | 2020 | ​
​ | Total Reported in Summary Compensation Table (SCT) | ​ | ​ | ​ | $ | 6,863,527 | ​ | ​ | ​ | ​ | $ | 2,521,773 | ​ | ​
​ | Less, Value of Stock & Option Awards Reported in SCT(1) | ​ | ​ | ​ | ​ | (5,777,307) | ​ | ​ | ​ | ​ | ​ | (1,450,003) | ​ | ​
​ | Plus, Year-End Value of Awards Granted in Fiscal Year That Are Unvested and Outstanding | ​ | ​ | ​ | ​ | 5,875,819 | ​ | ​ | ​ | ​ | ​ | 1,486,991 | ​ | ​
​ | Plus, Change in Fair Value of Prior Year Awards That Are Outstanding and Unvested | ​ | ​ | ​ | ​ | 4,920,552 | ​ | ​ | ​ | ​ | ​ | (67,429) | ​ | ​
​ | Plus, FMV of Awards Granted this Year That Vested this Year | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | Plus, Change in Fair Value (from Prior Year-End) of Prior Year awards That Vested this year | ​ | ​ | ​ | ​ | 4,213,850 | ​ | ​ | ​ | ​ | ​ | (72,154) | ​ | ​
​ | Less, Prior Year Fair Value of Prior Year awards That Failed to Vest this year | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | Plus, Dividends or Earnings Paid on Awards not Otherwise Reflected in Fair Value | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Compensation Actually Paid | ​ | ​ | ​ | $ | 16,096,441 | ​ | ​ | ​ | ​ | $ | 2,419,178 | ​ | ​
Non-PEO NEO Average Total Compensation Amount | $ 3,827,960 | $ 1,667,352 | $ 688,309 | $ 685,422
Non-PEO NEO Average Compensation Actually Paid Amount | $ 3,356,039 | (574,925) | 1,155,454 | 695,307
Adjustment to Non-PEO NEO Compensation Footnote | (3) The Non-PEO NEOs shown in the table above for each applicable fiscal year are as follows: ​
​ | Year | ​ | ​ | Non-PEO NEOs | ​
​ | 2023 | ​ | ​ | Kenneth Sim, M.D., Chandan Basho, M.B.A., and Albert Young, M.D., M.P.H. | ​
​ | 2022 | ​ | ​ | Kenneth Sim, M.D., Chandan Basho, M.B.A., Albert Young, M.D., M.P.H., and Eric Chin | ​
​ | 2021 | ​ | ​ | Eric Chin and Albert Young, M.D., M.P.H. | ​
​ | 2020 | ​ | ​ | Eric Chin, Brandon K. Sim M.S., Adrian Vazquez, M.D., and Albert Young, M.D., M.P.H. | ​
​ | ​ | ​ | ​ | Average NEOs | ​
​ | ​ | ​ | ​ | 2023 | ​ | ​ | 2022 | ​ | ​ | 2021 | ​ | ​ | 2020 | ​
​ | Total Reported in Summary Compensation Table (SCT) | ​ | ​ | ​ | $ | 3,827,960 | ​ | ​ | ​ | ​ | $ | 1,667,352 | ​ | ​ | ​ | ​ | $ | 688,309 | ​ | ​ | ​ | ​ | $ | 685,422 | ​ | ​
​ | Less, Value of Stock & Option Awards Reported in SCT(1) | ​ | ​ | ​ | ​ | (2,617,300) | ​ | ​ | ​ | ​ | ​ | (880,452) | ​ | ​ | ​ | ​ | ​ | (205,730) | ​ | ​ | ​ | ​ | ​ | (204,895) | ​ | ​
​ | Plus, Year-End Value of Awards Granted in Fiscal Year That Are Unvested and Outstanding | ​ | ​ | ​ | ​ | 1,818,867 | ​ | ​ | ​ | ​ | ​ | 524,690 | ​ | ​ | ​ | ​ | ​ | 652,802 | ​ | ​ | ​ | ​ | ​ | 107,514 | ​ | ​
​ | Plus, Change in Fair Value of Prior Year Awards That Are Outstanding and Unvested | ​ | ​ | ​ | ​ | 180,624 | ​ | ​ | ​ | ​ | ​ | (956,215) | ​ | ​ | ​ | ​ | ​ | 17,308 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | Plus, FMV of Awards Granted this Year That Vested this Year | ​ | ​ | ​ | ​ | 155,544 | ​ | ​ | ​ | ​ | ​ | 77,967 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 107,266 | ​ | ​
​ | Plus, Change in Fair Value (from Prior Year-End) of Prior Year awards That Vested this year | ​ | ​ | ​ | ​ | (9,656) | ​ | ​ | ​ | ​ | ​ | (1,008,267) | ​ | ​ | ​ | ​ | ​ | 2,765 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | Less, Prior Year Fair Value of Prior Year awards That Failed to Vest this year | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | Plus, Dividends or Earnings Paid on Awards not Otherwise Reflected in Fair Value | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Compensation Actually Paid | ​ | ​ | ​ | $ | 3,356,039 | ​ | ​ | ​ | ​ | $ | (574,925) | ​ | ​ | ​ | ​ | $ | 1,155,454 | ​ | ​ | ​ | ​ | $ | 695,307 | ​ | ​
​ (1) Stock option fair values are calculated at each measurement date using a Black-Scholes valuation model, consistent with the approach used to value the awards at the grant date. Stock option fair values as of each measurement date were determined using updated assumptions (the closing stock price of our Common Stock as of the measurement date, risk-free interest rate, expected life, expected volatility of the price of our Common Stock, and expected dividend yield) and fair value increases are primarily driven by an increase in the price of the Company’s Common Stock. |  |  |
Compensation Actually Paid vs. Total Shareholder Return |  |  |  |
Compensation Actually Paid vs. Net Income |  |  |  |
Compensation Actually Paid vs. Company Selected Measure |  |  |  |
Total Shareholder Return Vs Peer Group |  |  |  |
Tabular List, Table |
​ | Most Important Financial Performance Measures | ​
​ | Adjusted EBITDA | ​
​ | Revenue | ​
Total Shareholder Return Amount | $ 208 | 161 | 399 | 99
Peer Group Total Shareholder Return Amount | 143 | 140 | 143 | 113
Net Income (Loss) | $ 58,000,000 | $ 46,000,000 | $ 46,000,000 | $ 122,000,000
Company Selected Measure Amount | 147 | 140 | 134 | 103
Measure:: 1 |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Name | Adjusted EBITDA |  |  |
Non-GAAP Measure Description | (6) The company selected measure is Adjusted EBITDA. |  |  |
Measure:: 2 |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Name | Revenue |  |  |
Thomas S. Lam [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
PEO Total Compensation Amount | $ 5,217,562 | $ 1,487,709 | $ 6,857,194 | $ 2,515,142
PEO Actually Paid Compensation Amount | $ 4,314,127 | (5,920,199) | 16,090,110 | 2,412,546
PEO Name | Thomas Lam |  |  |
Brandon K. Sim [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
PEO Total Compensation Amount | $ 14,311,250 | 15,302,775 | 9,006,157 |
PEO Actually Paid Compensation Amount | $ 13,561,755 | 997,261 | 15,536,119 |
PEO Name | Brandon K. Sim |  |  |
Kenneth Sim [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
PEO Total Compensation Amount |  |  | 6,863,527 | 2,521,773
PEO Actually Paid Compensation Amount |  |  | 16,096,441 | 2,419,178
PEO | Thomas S. Lam [Member] | Equity Awards Value In Summary Compensation Table (Grant Date Value) [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | (3,253,500) |  | (5,777,307) | (1,450,003)
PEO | Thomas S. Lam [Member] | Year-end Fair Value Of Awards Granted In The Current Fiscal Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 2,298,000 |  | 5,875,821 | 1,486,990
PEO | Thomas S. Lam [Member] | Change In Fair Value Of Outstanding And Unvested Awards Granted In Prior Fiscal Years [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 171,330 | (3,852,379) | 4,920,552 | (67,429)
PEO | Thomas S. Lam [Member] | Change In Fair Value As Of Vesting Date Of Current Year Awards Vested During Current Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount |  |  |  |
PEO | Thomas S. Lam [Member] | Change In Fair Value As Of Vesting Date Of Prior Year Awards Vested During Current Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | (119,265) | (3,555,529) | 4,213,850 | (72,154)
PEO | Thomas S. Lam [Member] | Adjustments For Equity Awards Failed To Meet Performance Conditions [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount |  |  |  |
PEO | Thomas S. Lam [Member] | Dividends Or Other Earnings Paid On Equity Awards Not Otherwise Reflected In Fair Value [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount |  |  |  |
PEO | Brandon K. Sim [Member] | Equity Awards Value In Summary Compensation Table (Grant Date Value) [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | (12,499,943) | (13,567,843) | (7,816,831) |
PEO | Brandon K. Sim [Member] | Year-end Fair Value Of Awards Granted In The Current Fiscal Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 9,243,092 | 6,778,744 | 13,976,639 |
PEO | Brandon K. Sim [Member] | Change In Fair Value Of Outstanding And Unvested Awards Granted In Prior Fiscal Years [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 1,821,347 | (5,032,202) |  |
PEO | Brandon K. Sim [Member] | Change In Fair Value As Of Vesting Date Of Current Year Awards Vested During Current Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 527,597 |  |  |
PEO | Brandon K. Sim [Member] | Change In Fair Value As Of Vesting Date Of Prior Year Awards Vested During Current Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 158,412 | (2,484,213) | 370,154 |
PEO | Brandon K. Sim [Member] | Adjustments For Equity Awards Failed To Meet Performance Conditions [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount |  |  |  |
PEO | Brandon K. Sim [Member] | Dividends Or Other Earnings Paid On Equity Awards Not Otherwise Reflected In Fair Value [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount |  |  |  |
PEO | Kenneth Sim [Member] | Equity Awards Value In Summary Compensation Table (Grant Date Value) [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount |  |  | (5,777,307) | (1,450,003)
PEO | Kenneth Sim [Member] | Year-end Fair Value Of Awards Granted In The Current Fiscal Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount |  |  | 5,875,819 | 1,486,991
PEO | Kenneth Sim [Member] | Change In Fair Value Of Outstanding And Unvested Awards Granted In Prior Fiscal Years [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount |  |  | 4,920,552 | (67,429)
PEO | Kenneth Sim [Member] | Change In Fair Value As Of Vesting Date Of Current Year Awards Vested During Current Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount |  |  |  |
PEO | Kenneth Sim [Member] | Change In Fair Value As Of Vesting Date Of Prior Year Awards Vested During Current Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount |  |  | 4,213,850 | (72,154)
PEO | Kenneth Sim [Member] | Adjustments For Equity Awards Failed To Meet Performance Conditions [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount |  |  |  |
PEO | Kenneth Sim [Member] | Dividends Or Other Earnings Paid On Equity Awards Not Otherwise Reflected In Fair Value [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount |  |  |  |
Non-PEO NEO | Equity Awards Value In Summary Compensation Table (Grant Date Value) [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | (2,617,300) | (880,452) | (205,730) | (204,895)
Non-PEO NEO | Year-end Fair Value Of Awards Granted In The Current Fiscal Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 1,818,867 | 524,690 | 652,802 | 107,514
Non-PEO NEO | Change In Fair Value Of Outstanding And Unvested Awards Granted In Prior Fiscal Years [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 180,624 | (956,215) | 17,308 |
Non-PEO NEO | Change In Fair Value As Of Vesting Date Of Current Year Awards Vested During Current Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 155,544 | 77,967 |  | 107,266
Non-PEO NEO | Change In Fair Value As Of Vesting Date Of Prior Year Awards Vested During Current Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | (9,656) | (1,008,267) | 2,765 |
Non-PEO NEO | Adjustments For Equity Awards Failed To Meet Performance Conditions [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount |  |  |  |
Non-PEO NEO | Dividends Or Other Earnings Paid On Equity Awards Not Otherwise Reflected In Fair Value [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount |  |  |  |

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