Nature Of Business And Summary Of Significant Accounting Policies Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at beginning of year	$ 55	$ 20	$ 62
Write-offs	0	(8)	(25)
Recoveries	0	0	0
Change in provision	(31)	43	(17)
Balance at end of year	$ 24	$ 55	$ 20