Summary Of Significant Accounting Policies [Line Items]

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
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The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Amount recognized for uncertainty in income taxes classified as noncurrent.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Summary Of Significant Accounting Policies [Line Items]
General and administrative	$ 3,814,000	$ 5,675,000	$ 5,173,000	$ 5,383,000	$ 5,801,000	$ 4,434,000	$ 3,924,000	$ 1,344,000	$ 20,045,000	$ 15,503,000	$ 3,415,000
Long-lived asset impairment									0	0	0
Patent costs									600,000	800,000	$ 500,000
Liability for Uncertainty in Income Taxes, Noncurrent	$ 0				$ 0				$ 0	$ 0
Acquired Patents And Licenses [Member]
Summary Of Significant Accounting Policies [Line Items]
Intangible asset useful life									12 years
Maximum [Member] \| Equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Useful life									5 years
Minimum [Member] \| Equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Useful life									3 years