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

3 Months Ended

Mar. 31, 2021

Supplemental Cash Flow Elements [Abstract]

Supplemental Disclosure of Cash Flow and Non-cash Investing and Financing Activities

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

	Three Months Ended March 31,
	2021		2020
Cash paid for interest	$	1,094	$	1,840
Income taxes paid	4		6
Non-cash activities:
Lease right of use asset and liability	189		—
Note receivable for sale of property and equipment	75		—
Purchases of equipment in accounts payable	159		—
Fair value of non-cash consideration received for option exercise	380		—
Deemed dividends on Series B Convertible Preferred Stock	462		—