Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2019

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,
	2019		2018		2017
Cash paid for interest	$	636	$	109	$	22
Cash paid for federal and state income taxes	234		787		459
Non-cash transactions:
Change in accounts payable related to property and equipment     additions	(448)		1,685		70
Property and equipment acquired under finance leases	4,148		2,898		1,808
Issuance of common shares in asset acquisition (see Note 7)	392		—		—
Receivable for sale of property and equipment	952		—		—