Intangible Assets (Schedule of changes in the carrying value of customer list intangible) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Finite-lived Intangible Assets [Roll Forward]
Amortization	$ (10)	$ (11)	$ (21)	$ (22)	$ (43)
Ending balance	220		220
RAM
Finite-lived Intangible Assets [Roll Forward]
Beginning balance			241	$ 284	284
Amortization			(21)		(43)
Ending balance	220		220		241
Accumulated amortization and impairment	$ 727		$ 727		$ 706

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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