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Pay vs Performance Disclosure - USD ($) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Pay vs Performance Disclosure |  |  |
Pay vs Performance Disclosure, Table |
​ | Year | ​ | ​ | Summary Compensation Table Total for PEO(1) | ​ | ​ | Compensation Actually Paid to PEO(2) | ​ | ​ | Average Summary Compensation Table Total for Non-PEO Named Executive Officers(3) | ​ | ​ | Average Compensation Actually Paid to Non-PEO Named Executive Officers(2) | ​ | ​ | Total Shareholder Return (Initial Value $100)(4) | ​ | ​ | Net Income | ​
​ | 2022 | ​ | ​ | ​ | $ | 2,671,439 | ​ | ​ | ​ | ​ | $ | 1,982,879 | ​ | ​ | ​ | ​ | $ | 825,190 | ​ | ​ | ​ | ​ | $ | 638,930 | ​ | ​ | ​ | ​ | $ | (15.69) | ​ | ​ | ​ | ​ | $ | (53,418,000) | ​ | ​
​ | 2023 | ​ | ​ | ​ | $ | 2,401,649 | ​ | ​ | ​ | ​ | $ | 644,841 | ​ | ​ | ​ | ​ | $ | 791,656 | ​ | ​ | ​ | ​ | $ | 271,421 | ​ | ​ | ​ | ​ | $ | (62.37) | ​ | ​ | ​ | ​ | $ | (56,290,000) | ​ | ​
​ | 2024 | ​ | ​ | ​ | $ | 1,874,138 | ​ | ​ | ​ | ​ | $ | 604,355 | ​ | ​ | ​ | ​ | $ | 706,371 | ​ | ​ | ​ | ​ | $ | 299,337 | ​ | ​ | ​ | ​ | $ | (81.46) | ​ | ​ | ​ | ​ | $ | (35,636,000) | ​ | ​
​ (1) William B. Shepro was the PEO for each of 2022, 2023 and 2024. ​ (2) SEC rules require certain adjustments be made to the Summary Compensation Table totals to determine Compensation Actually Paid as reported in the Pay versus Performance Table. Compensation Actually Paid does not necessarily represent cash and/or equity value transferred to the applicable named executive officer without restriction, but rather is a value calculated under applicable SEC rules. In general, Compensation Actually Paid is calculated as Summary Compensation Table total compensation adjusted to include the fair market value of equity awards as of December 31 of the applicable year or, if earlier, the vesting date (rather than the grant date). ​ (3) Our non-PEO Named Executive Officers for 2022, 2023 and 2024 were Michelle D. Esterman and Gregory J. Ritts. ​ (4) Total Shareholder Return is calculated based on a fixed $100 investment as of December 31 of the previous year, with the return on such investment measured as of market close on the last trading day of the year being reported. ​ The following table outlines the adjustments made to the compensation earned by our PEO and non-PEO Named Executive Officers, as presented in the Summary Compensation Table, to derive the Compensation Actually Paid to them.
​ | Item and Value Added (Deducted) | ​ | ​ | 2024 | ​ | ​ | 2023 | ​ | ​ | 2022 | ​
​ | For PEO: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Summary Compensation Table Total | ​ | ​ | ​ | $ | 1,874,138 | ​ | ​ | ​ | ​ | $ | 2,401,649 | ​ | ​ | ​ | ​ | $ | 2,671,439 | ​ | ​
​ | - Summary Compensation Table “Stock Awards” column value | ​ | ​ | ​ | $ | (664,010) | ​ | ​ | ​ | ​ | $ | (1,185,575) | ​ | ​ | ​ | ​ | $ | (1,414,117) | ​ | ​
​ | + year-end fair value of outstanding and unvested equity awards granted in the fiscal year | ​ | ​ | ​ | $ | 171,680 | ​ | ​ | ​ | ​ | $ | 825,767 | ​ | ​ | ​ | ​ | $ | 1,284,961 | ​ | ​
​ | +/- change in fair value of outstanding and unvested equity awards granted in prior years | ​ | ​ | ​ | $ | (597,645) | ​ | ​ | ​ | ​ | $ | (865,194) | ​ | ​ | ​ | ​ | $ | (198,831) | ​ | ​
​ | + vest date fair value of equity awards granted in the covered year | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | +/- change in fair value of prior-year equity awards vested in the fiscal year | ​ | ​ | ​ | $ | (151,192) | ​ | ​ | ​ | ​ | $ | (336,571) | ​ | ​ | ​ | ​ | $ | 17,305 | ​ | ​
​ | - fair value at the end of prior year of awards granted in prior years that fail to meet vesting conditions | ​ | ​ | ​ | $ | (28,615) | ​ | ​ | ​ | ​ | $ | (195,235) | ​ | ​ | ​ | ​ | $ | (377,878) | ​ | ​
​ | Compensation Actually Paid | ​ | ​ | ​ | $ | 604,355 | ​ | ​ | ​ | ​ | $ | 644,841 | ​ | ​ | ​ | ​ | $ | 1,982,879 | ​ | ​
​ | Item and Value Added (Deducted) | ​ | ​ | 2024 | ​ | ​ | 2023 | ​ | ​ | 2022 | ​
​ | For Non-PEO Named Executive Officers (Average): | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Summary Compensation Table Total | ​ | ​ | ​ | $ | 706,372 | ​ | ​ | ​ | ​ | $ | 791,656 | ​ | ​ | ​ | ​ | $ | 825,190 | ​ | ​
​ | - Summary Compensation Table “Stock Awards” column value | ​ | ​ | ​ | $ | (241,008) | ​ | ​ | ​ | ​ | $ | (266,900) | ​ | ​ | ​ | ​ | $ | (324,945) | ​ | ​
​ | + year-end fair value of outstanding and unvested equity awards granted in the fiscal year | ​ | ​ | ​ | $ | 59,258 | ​ | ​ | ​ | ​ | $ | 183,970 | ​ | ​ | ​ | ​ | $ | 298,033 | ​ | ​
​ | +/- change in fair value of outstanding and unvested equity awards granted in prior years | ​ | ​ | ​ | $ | (169,808) | ​ | ​ | ​ | ​ | $ | (306,552) | ​ | ​ | ​ | ​ | $ | (80,955) | ​ | ​
​ | + vest date fair value of equity awards granted in the covered year | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | +/- change in fair value of prior-year equity awards vested in the fiscal year | ​ | ​ | ​ | $ | (35,566) | ​ | ​ | ​ | ​ | $ | (90,127) | ​ | ​ | ​ | ​ | $ | 1,532 | ​ | ​
​ | - fair value at the end of prior year of awards granted in prior years that fail to meet vesting conditions | ​ | ​ | ​ | $ | (19,911) | ​ | ​ | ​ | ​ | $ | (40,626) | ​ | ​ | ​ | ​ | $ | (79,925) | ​ | ​
​ | Compensation Actually Paid | ​ | ​ | ​ | $ | 299,337 | ​ | ​ | ​ | ​ | $ | 271,421 | ​ | ​ | ​ | ​ | $ | 638,930 | ​ | ​
Named Executive Officers, Footnote | (1) William B. Shepro was the PEO for each of 2022, 2023 and 2024. (3) Our non-PEO Named Executive Officers for 2022, 2023 and 2024 were Michelle D. Esterman and Gregory J. Ritts. |  |
PEO Total Compensation Amount | $ 1,874,138 | $ 2,401,649 | $ 2,671,439
PEO Actually Paid Compensation Amount | $ 604,355 | 644,841 | 1,982,879
Adjustment To PEO Compensation, Footnote | The following table outlines the adjustments made to the compensation earned by our PEO and non-PEO Named Executive Officers, as presented in the Summary Compensation Table, to derive the Compensation Actually Paid to them.
​ | Item and Value Added (Deducted) | ​ | ​ | 2024 | ​ | ​ | 2023 | ​ | ​ | 2022 | ​
​ | For PEO: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Summary Compensation Table Total | ​ | ​ | ​ | $ | 1,874,138 | ​ | ​ | ​ | ​ | $ | 2,401,649 | ​ | ​ | ​ | ​ | $ | 2,671,439 | ​ | ​
​ | - Summary Compensation Table “Stock Awards” column value | ​ | ​ | ​ | $ | (664,010) | ​ | ​ | ​ | ​ | $ | (1,185,575) | ​ | ​ | ​ | ​ | $ | (1,414,117) | ​ | ​
​ | + year-end fair value of outstanding and unvested equity awards granted in the fiscal year | ​ | ​ | ​ | $ | 171,680 | ​ | ​ | ​ | ​ | $ | 825,767 | ​ | ​ | ​ | ​ | $ | 1,284,961 | ​ | ​
​ | +/- change in fair value of outstanding and unvested equity awards granted in prior years | ​ | ​ | ​ | $ | (597,645) | ​ | ​ | ​ | ​ | $ | (865,194) | ​ | ​ | ​ | ​ | $ | (198,831) | ​ | ​
​ | + vest date fair value of equity awards granted in the covered year | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | +/- change in fair value of prior-year equity awards vested in the fiscal year | ​ | ​ | ​ | $ | (151,192) | ​ | ​ | ​ | ​ | $ | (336,571) | ​ | ​ | ​ | ​ | $ | 17,305 | ​ | ​
​ | - fair value at the end of prior year of awards granted in prior years that fail to meet vesting conditions | ​ | ​ | ​ | $ | (28,615) | ​ | ​ | ​ | ​ | $ | (195,235) | ​ | ​ | ​ | ​ | $ | (377,878) | ​ | ​
​ | Compensation Actually Paid | ​ | ​ | ​ | $ | 604,355 | ​ | ​ | ​ | ​ | $ | 644,841 | ​ | ​ | ​ | ​ | $ | 1,982,879 | ​ | ​
Non-PEO NEO Average Total Compensation Amount | $ 706,371 | 791,656 | 825,190
Non-PEO NEO Average Compensation Actually Paid Amount | $ 299,337 | 271,421 | 638,930
Adjustment to Non-PEO NEO Compensation Footnote | The following table outlines the adjustments made to the compensation earned by our PEO and non-PEO Named Executive Officers, as presented in the Summary Compensation Table, to derive the Compensation Actually Paid to them.
​ | Item and Value Added (Deducted) | ​ | ​ | 2024 | ​ | ​ | 2023 | ​ | ​ | 2022 | ​
​ | For Non-PEO Named Executive Officers (Average): | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Summary Compensation Table Total | ​ | ​ | ​ | $ | 706,372 | ​ | ​ | ​ | ​ | $ | 791,656 | ​ | ​ | ​ | ​ | $ | 825,190 | ​ | ​
​ | - Summary Compensation Table “Stock Awards” column value | ​ | ​ | ​ | $ | (241,008) | ​ | ​ | ​ | ​ | $ | (266,900) | ​ | ​ | ​ | ​ | $ | (324,945) | ​ | ​
​ | + year-end fair value of outstanding and unvested equity awards granted in the fiscal year | ​ | ​ | ​ | $ | 59,258 | ​ | ​ | ​ | ​ | $ | 183,970 | ​ | ​ | ​ | ​ | $ | 298,033 | ​ | ​
​ | +/- change in fair value of outstanding and unvested equity awards granted in prior years | ​ | ​ | ​ | $ | (169,808) | ​ | ​ | ​ | ​ | $ | (306,552) | ​ | ​ | ​ | ​ | $ | (80,955) | ​ | ​
​ | + vest date fair value of equity awards granted in the covered year | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | +/- change in fair value of prior-year equity awards vested in the fiscal year | ​ | ​ | ​ | $ | (35,566) | ​ | ​ | ​ | ​ | $ | (90,127) | ​ | ​ | ​ | ​ | $ | 1,532 | ​ | ​
​ | - fair value at the end of prior year of awards granted in prior years that fail to meet vesting conditions | ​ | ​ | ​ | $ | (19,911) | ​ | ​ | ​ | ​ | $ | (40,626) | ​ | ​ | ​ | ​ | $ | (79,925) | ​ | ​
​ | Compensation Actually Paid | ​ | ​ | ​ | $ | 299,337 | ​ | ​ | ​ | ​ | $ | 271,421 | ​ | ​ | ​ | ​ | $ | 638,930 | ​ | ​
Compensation Actually Paid vs. Total Shareholder Return |  |  |
Compensation Actually Paid vs. Net Income |  |  |
Total Shareholder Return Amount | $ (81.46) | (62.37) | (15.69)
Net Income (Loss) | $ (35,636,000) | (56,290,000) | (53,418,000)
PEO Name | William B. Shepro |  |
PEO | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table |  |  |
Pay vs Performance Disclosure |  |  |
Adjustment to Compensation, Amount | $ (664,010) | (1,185,575) | (1,414,117)
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 | 171,680 | 825,767 | 1,284,961
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 | (597,645) | (865,194) | (198,831)
PEO | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year |  |  |
Pay vs Performance Disclosure |  |  |
Adjustment to Compensation, Amount |  |  |
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 | (151,192) | (336,571) | 17,305
PEO | 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 | (28,615) | (195,235) | (377,878)
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 | (241,008) | (266,900) | (324,945)
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 | 59,258 | 183,970 | 298,033
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 | (169,808) | (306,552) | (80,955)
Non-PEO NEO | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year |  |  |
Pay vs Performance Disclosure |  |  |
Adjustment to Compensation, Amount |  |  |
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 | (35,566) | (90,127) | 1,532
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 | $ (19,911) | $ (40,626) | $ (79,925)

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