Supplemental Disclosure of Cash Flow and Non-Cash Investing and Financing Activities (Tables)

12 Months Ended

Dec. 31, 2019

Supplemental Cash Flow Elements [Abstract]

Supplemental disclosure of cash flow and non-cash investing and financing activities

Selected cash payments, receipts, and noncash activities are as follows (in thousands):

	Years Ended December 31,
	2019		2018		2017
Cash paid for interest	$	4,331	$	197	$	127
Income taxes paid	308		859		12,755
Non-cash activities:
Purchases of equipment included in accounts payable	1,184		1,168		1,343
Deferred financing costs	6,650		—		30
Stock issuance in exchange for services performed	—		—		166