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Supplemental Consolidated Balance Sheet Information (Tables)

12 Months Ended

Dec. 31, 2020

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, 2020 and 2019 was as follows:

​	​	​	​	​	​	​
​	​	Year Ended December 31,
​		​	2020	​	​	2019
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

Other current liabilities (in thousands) consist of the following at December 31, 2020 and 2019:

​	​	​	​	​	​	​
​	​	December 31,
​		2020			2019
Accrued self-insurance reserves	​	$	851	​	$	2,771
Other accrued expenses and current liabilities	​		960	​		828
Other current liabilities	​	$	1,811	​	$	3,599

Schedule of operating revenues disaggregated by geographic region

​	​	​	​	​	​	​
​	​	Year Ended December 31,
​		​	2020	​	​	2019
Operating revenues	​	​	​	​	​	​
United States	​	$	73,983	​	$	129,452
Canada	​	​	12,117	​	​	16,321
Total	​	$	86,100	​	$	145,773

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Tabular disclosure of allowance for credit loss on accounts receivable.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
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-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
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