Organization and Summary of Significant Accounting Policies (Changes in Allowance for Doubtful Accounts) (Details) - Allowance for Doubtful Accounts [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounting Policies [Line Items]
Balance of allowance at beginning of year	$ 2,547	$ 1,356	$ 1,044
Increase in allowance charged to expense	(472)	(1,445)	(801)
Accounts charged against allowance	765	254	489
Balance of allowance at ending of year	$ 2,254	$ 2,547	$ 1,356