Summary Of Business and Significant Accounting Policies (K Narrative) (Details)	12 Months Ended
	Dec. 31, 2016 USD ($) segment	Dec. 31, 2015 USD ($)
Summary Of Business And Significant Accounting Policies [Line Items]
Costs incurred to develop software, amortization period	4 years
Number of reporting units | segment	1
Number of operating segments | segment	1
Goodwill impairment | $	$ 0
Initial setup fees, recognition term	1 year
Minimum
Summary Of Business And Significant Accounting Policies [Line Items]
Property and equipment, estimated useful lives	3 years
Maximum
Summary Of Business And Significant Accounting Policies [Line Items]
Property and equipment, estimated useful lives	5 years
Contingent Consideration BCI and CBS
Summary Of Business And Significant Accounting Policies [Line Items]
Changes in fair value of contingent considerations | $	$ 100,000	$ 100,000