Supplemental Disclosure of Cash Flow and Non-Cash Investing and Financing Activities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Supplemental Cash Flow Elements [Abstract]
Cash paid for interest	$ 1,034	$ 1,094
Income taxes paid	0	4
Non-cash activities:
Right of use assets arising from operating lease liabilities	(37)	0
Right of use assets arising from finance lease liabilities	0	189
Note receivable for sale of property and equipment	0	75
Purchases of equipment in accounts payable	287	159
Fair value of non-cash consideration received for option exercise	0	380
Deemed dividends on Series B Preferred Stock	$ 0	$ 462