Discontinued Operations - Cash flow activity (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2020
Discontinued Operating Activities
Net loss from discontinued operations	$ (1,618)	$ (4,943)
Changes in operating assets and liabilities:
Net cash used by operating activities of discontinued operations		(3,181)
Investing Activities of Discontinued Operations
Net cash used by investing activities of discontinued operations		(22)
Financing Activities of Discontinued Operations
Net cash provided by financing activities of discontinued operations		307
Silver Opportunity Partners Corporation \| Spin off
Discontinued Operating Activities
Net loss from discontinued operations	(1,618)	(4,943)
Adjustments to reconcile net loss to net cash used by operating activities:
Amortization	$ 588	1,774
Stock compensation expense		179
Accretion expense		82
Changes in operating assets and liabilities:
Accounts payable and other accrued liabilities		(226)
Other current assets		(47)
Net cash used by operating activities of discontinued operations		(3,181)
Investing Activities of Discontinued Operations
Purchase of property, plant and equipment		(22)
Net cash used by investing activities of discontinued operations		(22)
Financing Activities of Discontinued Operations
PPP Loan proceeds		307
Net cash provided by financing activities of discontinued operations		$ 307

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Amount of accretion expense attributable to disposal group, including, but not limited to, discontinued operation.

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The increase (decrease) during the reporting period in the amounts payable to vendors for goods and services received and the amount of obligations and expenses incurred but not paid, attributable to disposal group, including, but not limited to, discontinued operation.

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The increase (decrease) during the reporting period in other current assets, attributable to disposal group, including, but not limited to, discontinued operation.

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets, attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of cash inflow from Paycheck Protection Program Loans, attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of cash inflow (outflow) of financing activities of discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.

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