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Accounting for Share-Based Payments - Narrative (Details) - USD ($) |  |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Nov. 10, 2020 | Jun. 30, 2020 | Feb. 05, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2018 | Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares authorized (in shares) |  |  |  | 1,500,000 |  |  |
Options available (in shares) |  |  |  | 900,000 |  |  |
Compensation expense |  |  |  | $ 800,000 | $ 1,800,000 |  |
(Benefit from) provision for income taxes |  |  |  | $ 200,000 | $ 200,000 |  |
Exercised (in shares) |  |  |  | 13,174 | 0 |  |
Options exercisable (in shares) |  |  |  | 129,163 |  |  |
Options exercisable, weighted average exercise price (in dollars per share) |  |  |  | $ 13.05 |  |  |
Share-based compensation expense |  |  |  | $ 799,000 | $ 1,791,000 |  |
Nonvested award, cost not yet recognized, period for recognition |  |  |  | 1 year 1 month 6 days |  |  |
Issuance of shares of common stock from the treasury (in shares) |  |  |  | 191,673 | 194,082 |  |
Non Employee Director |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Issuance of shares of common stock from the treasury (in shares) |  |  |  | 22,026 | 43,603 |  |
Annual cash retainer fees |  |  |  | $ 214,000 | $ 345,000 |  |
Board of Directors Chairman |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Issuance of shares of common stock from the treasury (in shares) |  |  |  | 20,000 |  |  |
Restricted Stock | Non Employee Director |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Maximum annual retainer percent |  |  |  | 100.00% |  |  |
Stock Options |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Exercised (in shares) |  |  |  | 13,174 | 0 |  |
Option exercises, aggregate exercise price |  |  |  | $ 109,324 |  |  |
Options exercisable (in shares) |  |  |  | 129,163 | 86,531 |  |
Options exercisable, weighted average exercise price (in dollars per share) |  |  |  | $ 13.05 | $ 13.77 |  |
Share-based compensation expense |  |  |  | $ 100,000 | $ 400,000 |  |
Total unrecognized compensation cost |  |  |  | $ 13,786 |  |  |
Stock Awards | Share-based Payment Arrangement, Tranche One |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Award vesting rights, percentage | 66.66% |  |  |  |  |  |
Stock Awards | Share-based Payment Arrangement, Tranche Two |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Award vesting rights, percentage | 33.33% |  |  |  |  |  |
Performance Shares |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting period |  |  |  | 3 years |  |  |
Granted, weighted average grant date fair value (in dollars per share) |  |  |  | $ 0.69 | $ 13.00 |  |
Options, vested in period, fair value |  |  |  | $ 1,100,000 | $ 600,000 |  |
Nonvested award, option, cost not yet recognized, amount |  |  |  | $ 0 |  |  |
Performance Shares | Minimum |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Award vesting rights, percentage |  |  |  | 0.00% |  |  |
Performance Shares | Maximum |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Award vesting rights, percentage |  |  |  | 150.00% |  |  |
Inducement Awards |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Compensation expense |  |  |  | $ 100,000 | 0 |  |
Total unrecognized compensation cost |  |  |  | $ 200,000 |  |  |
Nonvested award, cost not yet recognized, period for recognition |  |  |  | 2 years 6 months 10 days |  |  |
Granted, weighted average grant date fair value (in dollars per share) |  |  |  | $ 6.35 |  |  |
Options, vested in period, fair value |  |  |  | $ 200,000 | 0 |  |
Inducement Awards | Share-based Payment Arrangement, Tranche One |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Award vesting rights, percentage |  |  |  | 50.00% |  |  |
Inducement Awards | Share-based Payment Arrangement, Tranche Two |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Award vesting rights, percentage |  |  |  | 50.00% |  |  |
Vesting period |  |  |  | 3 years |  |  |
2011 Plan | Stock Options |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares authorized (in shares) |  |  |  | 0 |  |  |
Expected life |  | 10 years | 10 years | 10 years |  |  |
Period after grant date, awards vesting begins |  |  |  | 1 year |  |  |
2011 Plan | Stock Options | Minimum |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Award vesting rights, percentage |  |  |  | 20.00% |  |  |
2011 Plan | Stock Options | Maximum |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Award vesting rights, percentage |  |  |  | 33.00% |  |  |
2005 Stock Awards Plan | Stock Awards |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Share-based compensation expense |  |  |  | $ 400,000 | $ 1,000,000 |  |
Total unrecognized compensation cost |  |  |  | $ 200,000 |  |  |
Nonvested award, cost not yet recognized, period for recognition |  |  |  | 2 years 10 months 20 days |  |  |
2015 Stock Awards Plan | Stock Awards |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares authorized (in shares) |  |  |  | 1,500,000 |  | 500,000 | 250,000
Period after grant date, awards vesting begins |  |  |  | 1 year |  |  |
Expiration period for awards |  |  |  | 10 years |  |  |
2015 Stock Awards Plan | Stock Awards | Minimum |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Award vesting rights, percentage |  |  |  | 20.00% |  |  |
2015 Stock Awards Plan | Stock Awards | Maximum |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Award vesting rights, percentage |  |  |  | 33.00% |  |  |

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