Organization and Summary of Significant Accounting Policies (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at beginning of year	$ 172	$ 151	$ 132
Bad debt expense	73	68	285
Write-offs, net of recoveries	(63)	(47)	(266)
Balance at end of year	$ 182	$ 172	$ 151