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Supplemental Disclosure of Cash Flow and Non-Cash Investing and Financing Activities (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Supplemental Cash Flow Elements [Abstract] |  |  |  |
Cash paid for interest |  |  | $ 2,207 | $ 3,731
Income taxes paid |  |  | 157 | 13
Non-cash activities: |  |  |  |
Lease right of use asset and liability |  |  | 189 | 0
Note receivable for sale of property and equipment |  |  | 75 | 0
Purchases of equipment in accounts payable |  |  | 67 | 0
Fair value of non-cash consideration received for option exercise |  |  | 380 | 0
Deemed dividends on Series B Convertible Preferred Stock | $ 464 | $ 0 | 926 | 0
Deferred financing costs |  |  | 0 | 1,715
Amendment fee on BT Term Loan |  |  | $ 0 | $ 722

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- Definition Future cash outflow to pay for purchases of fixed assets that have occurred. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4332-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4313-108586 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4304-108586 + Details
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