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v3.25.1

Stock incentive plans, Stock options (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Remaining Term [Abstract] |  |  |
Unrecognized compensation cost related to stock options |  | $ 2,700 |
Weighted average period to recognize compensation cost not yet recognized |  | 2 years 8 months 12 days |
Fair value of all awards vested |  | $ 900 | $ 1,300
Intrinsic value of stock options exercised |  | 0 | 3
Cash received from exercise of stock options |  | 0 | 0
Excess tax benefit in provision for income taxes |  | $ 0 | $ 0
2005 Equity Incentive Plan and 2014 Equity Incentive Plan [Member] | Stock Options [Member] |  |  |
Number of Shares [Roll Forward] |  |  |
Outstanding, beginning of period (in shares) |  | 1,314,475 |
Granted (in shares) |  | 179,700 |
Exercised (in shares) |  | 0 | (1,875)
Forfeited (in shares) |  | (7,750) |
Expired (in shares) |  | (109,312) |
Outstanding, end of period (in shares) |  | 1,377,113 | 1,314,475
Options vested or expected to vest (in shares) |  | 1,377,113 |
Options exercisable, end of period (in shares) |  | 973,963 |
Weighted Average Exercise Price [Abstract] |  |  |
Outstanding, beginning of period (in dollars per share) | [1] | $ 8.82 |
Granted (in dollars per share) | [1] | 6.8 |
Exercised (in dollars per share) | [1] | 0 |
Forfeited (in dollars per share) | [1] | 7.11 |
Expired (in dollars per share) | [1] | 10.71 |
Outstanding, end of period (in dollars per share) | [1] | 8.41 | $ 8.82
Options vested or expected to vest (in dollars per share) | [1] | 8.41 |
Options exercisable, end of period (in dollars per share) | [1] | $ 8.96 |
Aggregate Intrinsic Value [Abstract] |  |  |
Options vested and expected to vest |  | $ 0 |
Options exercisable, end of period |  | $ 0 |
Remaining Term [Abstract] |  |  |
Options vested and expected to vest | [2] | 4 years 1 month 6 days |
Options exercisable, end of period | [2] | 2 years 2 months 12 days |
2005 Equity Incentive Plan and 2014 Equity Incentive Plan [Member] | Restricted Share Units [Member] |  |  |
Number of Shares [Roll Forward] |  |  |
Options vested or expected to vest (in shares) |  | 376,565 |
Weighted Average Exercise Price [Abstract] |  |  |
Options vested or expected to vest (in dollars per share) | [1] | $ 0 |
Number of Units [Roll Forward] |  |  |
Outstanding, beginning of period (in shares) |  | 184,536 |
Granted (in shares) |  | 267,024 |
Exercised (in shares) |  | (74,995) |
Forfeited (in shares) |  | 0 |
Expired (in shares) |  | 0 |
Outstanding, end of period (in shares) |  | 376,565 | 184,536
Weighted Average Grant Stock Price [Abstract] |  |  |
Outstanding, beginning of period (in dollars per share) | [3] | $ 7.76 |
Granted (in dollars per share) | [3] | 5.81 |
Exercised (in dollars per share) | [3] | 7.41 |
Forfeited (in dollars per share) | [3] | 0 |
Expired (in dollars per share) | [3] | 0 |
Outstanding, end of period (in dollars per share) | [3] | $ 6.44 | $ 7.76
Aggregate Intrinsic Value [Abstract] |  |  |
Restricted stock units vested and expected to vest |  | $ 1,540 |
Remaining Term [Abstract] |  |  |
Restricted stock units vested and expected to vest | [2] | 2 years 1 month 6 days |
[1] | weighted average exercise price per share
[2] | weighted-average contractual remaining term in years
[3] | weighted average grant stock price per share

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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(04) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(03) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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