Organization and Summary of Significant Accounting Policies (Software Costs) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Net capitalized software and development costs	$ 1.7	$ 4.7
Software and Software Development Costs \| Minimum
Property, Plant and Equipment [Line Items]
Useful life	3 years
Software and Software Development Costs \| Maximum
Property, Plant and Equipment [Line Items]
Useful life	5 years

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.

No definition available.

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration