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Stock-based Compensation - Summary of plans (Details) - USD ($) $ in Thousands |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jul. 25, 2018 | Feb. 29, 2020 | Feb. 28, 2019 | Jan. 31, 2019 | Feb. 28, 2018 | Apr. 30, 2017 | Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019 | Dec. 31, 2018
2008 LTIP |  |  |  |  |  |  |  |  |  |
Stock-based Compensation |  |  |  |  |  |  |  |  |  |
Shares authorized to be granted under stock compensation plan | 2,000,000 |  |  |  |  |  |  |  |  |
2008 LTIP | Cash-settled restricted stock units |  |  |  |  |  |  |  |  |  |
Stock-based Compensation |  |  |  |  |  |  |  |  |  |
Stock based compensation expense (reversal of expense) |  |  |  |  |  |  |  |  | $ 147 | $ (54)
2008 LTIP | Stock Options |  |  |  |  |  |  |  |  |  |
Stock-based Compensation |  |  |  |  |  |  |  |  |  |
Number of stock options granted (in shares) |  |  |  |  |  |  | 0 | 0 |  |
2008 LTIP | Chief Executive Officer | Cash-settled restricted stock units | Two-year period |  |  |  |  |  |  |  |  |  |
Stock-based Compensation |  |  |  |  |  |  |  |  |  |
Restricted stock award (in shares) |  |  |  |  | 97,195 | 129,270 |  |  |  |
Vesting period of stock award |  |  |  |  | 2 years | 2 years |  |  |  |
2018 LTIP |  |  |  |  |  |  |  |  |  |
Stock-based Compensation |  |  |  |  |  |  |  |  |  |
Shares authorized to be granted under stock compensation plan |  |  |  |  |  |  |  |  |  | 1,293,109
Contractual term of option awards | 10 years |  |  |  |  |  |  |  |  |
Shares issued for services |  |  |  |  |  |  |  |  | 458,932 |
Shares available for awards |  |  |  |  |  |  |  |  | 834,177 |
2018 LTIP | Stock Options |  |  |  |  |  |  |  |  |  |
Stock-based Compensation |  |  |  |  |  |  |  |  |  |
Stock based compensation expense (reversal of expense) |  |  |  |  |  |  | $ 9 | $ 9 |  |
Period for recognizing unrecognized compensation cost |  |  |  |  |  |  | 11 years |  |  |
2018 LTIP | Employees | Restricted stock |  |  |  |  |  |  |  |  |  |
Stock-based Compensation |  |  |  |  |  |  |  |  |  |
Stock based compensation expense (reversal of expense) |  |  |  |  |  |  | $ 71 |  |  |
Unrecognized compensation cost, restricted stock |  |  |  |  |  |  | $ 430 |  |  |
Period for recognizing unrecognized compensation cost |  |  |  |  |  |  | 23 months |  |  |
2018 LTIP | Employees | Restricted stock | Two-year period |  |  |  |  |  |  |  |  |  |
Stock-based Compensation |  |  |  |  |  |  |  |  |  |
Restricted stock award (in shares) |  | 140,218 | 428,797 |  |  |  |  |  |  |
Vesting period of stock award |  | 2 years | 2 years |  |  |  |  |  |  |
2018 LTIP | Directors | Common Stock |  |  |  |  |  |  |  |  |  |
Stock-based Compensation |  |  |  |  |  |  |  |  |  |
Restricted stock award (in shares) |  | 30,930 |  | 42,168 |  |  |  |  |  |
Stock based compensation expense (reversal of expense) |  |  |  |  |  |  | $ 45 | $ 52 |  |

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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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