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Supplemental Consolidated Financial Statement Information (Tables) | 12 Months Ended
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Dec. 31, 2021
Supplemental Consolidated Financial Statement Information |
Schedule of allowance for doubtful accounts | The activity in the allowance for doubtful accounts (in thousands) for the years ended December 31, 2021 and 2020 was as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ |  | ​ | 2021 | ​ | 2020
Beginning balance | ​ | $ | (250) | ​ | $ | (250)
Additional provisions to allowance | ​ | ​ | — | ​ | ​ | (1,625)
Write-offs against allowance - A/R | ​ | ​ | — | ​ | ​ | 191
Write-offs against allowance - N/R | ​ | ​ | — |  | ​ | 1,434
Recoveries collected | ​ | ​ | — |  | ​ | —
Ending balance | ​ | $ | (250) | ​ | $ | (250)
Schedule of other current liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ |  | ​ | 2021 | ​ | 2020
Beginning balance | ​ | $ | (250) | ​ | $ | (250)
Additional provisions to allowance | ​ | ​ | — | ​ | ​ | (1,625)
Write-offs against allowance - A/R | ​ | ​ | — | ​ | ​ | 191
Write-offs against allowance - N/R | ​ | ​ | — |  | ​ | 1,434
Recoveries collected | ​ | ​ | — |  | ​ | —
Ending balance | ​ | $ | (250) | ​ | $ | (250)
Schedule of operating revenues disaggregated by geographic region | The following table presents the Company’s operating revenues (unaudited and in thousands) disaggregated by geographic region: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ |  | ​ | 2021 | ​ | ​ | 2020
Operating Revenues | ​ | ​ | ​ | ​ | ​ | ​
United States | ​ | $ | 17,772 | ​ | $ | 73,983
Canada | ​ | ​ | 6,923 | ​ | ​ | 12,117
Total | ​ | $ | 24,695 | ​ | $ | 86,100

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