Supplemental Disclosure of Cash Flow and Non-Cash Investing and Financing Activities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Supplemental Cash Flow Elements [Abstract]
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	0	30
Stock issuance in exchange for services performed	$ 0	$ 0	$ 166