Investments Securities (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 34,567	$ 41,105
Gross Unrealized Gains	19	6
Gross Unrealized Losses	5	32
Estimated Fair Value	34,581	41,079
U.S Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	32,000	37,010
Gross Unrealized Gains	15	0
Gross Unrealized Losses	5	29
Estimated Fair Value	32,010	36,981
U.S.Government treasuries [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	2,000	4,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	3
Estimated Fair Value	2,000	3,997
Collateralized Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	67	95
Gross Unrealized Gains	3	6
Gross Unrealized Losses	0	0
Estimated Fair Value	70	101
Mutual funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	500	0
Gross Unrealized Gains	1	0
Gross Unrealized Losses	0	0
Estimated Fair Value	$ 501	$ 0