Commitments and Contingencies (Narrative) (Details)	12 Months Ended
	Dec. 31, 2017
California office lease one
Commitment And Contingencies [Line Items]
Lease expiration period	2020-01
California office lease two
Commitment And Contingencies [Line Items]
Lease expiration period	2021-04
Illinois office lease
Commitment And Contingencies [Line Items]
Lease expiration period	2018-06
Arizona office lease
Commitment And Contingencies [Line Items]
Lease expiration period	2019-08
Automobile lease
Commitment And Contingencies [Line Items]
Lease expiration period	2020-05
Copier lease
Commitment And Contingencies [Line Items]
Lease expiration period	2018-10