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Unit Based Awards - Long-Term Incentive Plans (Tables) | 12 Months Ended
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Dec. 31, 2021
Share-based Payment Arrangement [Abstract] |
Schedule of Compensation Costs Related to Unit Based Plan | Amounts recognized in operating expense and selling, general, and administrative expense in the consolidated financial statements with respect to these plans are as follows:
| For the Year Ended December 31,
| 2021 |  | 2020 |  | 2019
Restricted unit awards |  |  |  |  |
Employees | $ | 194 |  |  | $ | 1,204 |  |  | $ | 1,226 |
Non-employee directors | 190 |  |  | — |  |  | — |
Phantom unit Awards |  |  |  |  |
Employees | 415 |  |  | — |  |  | — |
Non-employee directors | — |  |  | 218 |  |  | 198 |
Total unit-based compensation expense | $ | 799 |  |  | $ | 1,422 |  |  | $ | 1,424 |
Summary of Restricted Unit Activity | A summary of the restricted unit activity for the year ended December 31, 2021 is provided below:
| Number of Units |  | Weighted Average Grant-Date Fair Value Per Unit
Non-vested, beginning of year | 273,424 |  |  | $ | 10.52 |
Granted (TBRU) | 42,168 |  |  | $ | 2.49 |
Vested | (117,280) |  |  | $ | 11.96 |
Forfeited | (83,436) |  |  | $ | 13.90 |
Non-Vested, end of year | 114,876 |  |  | $ | 3.65 |
Aggregate intrinsic value, end of year | $ | 306 |  |  |
Summary of Aggregate Intrinsic Value and Fair Value of Units Vested | A summary of the restricted units’ aggregate intrinsic value (market value at vesting date) and fair value of units vested (market value at date of grant) during the years ended December 31, 2021, 2020 and 2019 is provided below:
| For the Year Ended December 31,
| 2021 |  | 2020 |  | 2019
Aggregate intrinsic value of units vested | $ | 257 |  |  | $ | 151 |  |  | $ | 1,351 |
Fair value of units vested | $ | 1,418 |  |  | $ | 1,427 |  |  | $ | 1,551 |

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- Definition Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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