Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2020

Supplemental Cash Flow Elements [Abstract]

Schedule of supplemental cash flow information

Supplemental cash flows and non-cash transactions were as follows for the periods indicated (in thousands):

	Year Ended December 31,
	2020		2019		2018
Cash paid for interest	$	444	$	636	$	109
Cash paid for federal and state income taxes	418		234		787
Cash refund for NOL carryback under CARES Act	2,703		—		—
Non-cash transactions:
Change in accounts payable related to property and equipment     additions	(1,237)		(448)		1685
Property and equipment acquired under finance leases	11,412		4,148		2,898
Issuance of common shares in asset acquisition (see Note 6)	—		392		—
Receivable for sale of property and equipment	—		952		—