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Leases And Commitments (Narrative) (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2016 USD ($) ft² | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Leases And Commitments [Line Items] |  |  |
Office space | ft² | 6,000 |  |
Rent expense | $ 0.1 | $ 0.1 | $ 0.1
Austin, TX [Member] |  |  |
Leases And Commitments [Line Items] |  |  |
Operating lease expiration year | 2017-12 |  |
Future minimum lease payments in 2017 | $ 0.1 |  |

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- Definition Leases And Commitments [Line Items] + References No definition available. + Details
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- Definition Operating lease expiration year. + References No definition available. + Details
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- Definition Amount of minimum lease payments for capital leases. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 + Details
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- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
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- Definition Net rentable area for properties owned. + References No definition available. + Details
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- Details
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