Supplemental cash flow (Tables)

9 Months Ended

Sep. 30, 2021

Supplemental cash flow

Schedule of supplemental cash flow

	Nine Months Ended September 30,
	2021		2020
Supplemental cash flow information:
Cash paid for interest	$	88	$	127
Income tax refunds		13		—
Supplemental non-cash investing and financing activities:
Accrued capital expenditures		13		13