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Marketable Securities (Details) - USD ($)
$ in Thousands
 4 Months Ended
Jun. 30, 2014
Jun. 30, 2015
Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]      
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss   $ (73)  
Amortized cost   25,118 $ 26,096
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax   115 117
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value   8,814  
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss   (92)  
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss   628  
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss   (19)  
Business Acquisition, Pro Forma Net Income (Loss) $ (163)    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value   8,186  
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax   92 57
Available-for-sale Securities   25,141 26,156
Corporate Debt Securities [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss   (72)  
Amortized cost   18,966 19,804
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax   92 89
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value   7,841  
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss   (90)  
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss   398  
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss   (18)  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value   7,443  
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax   90 55
Available-for-sale Securities   18,968 19,838
Municipal Bonds [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss   (1)  
Amortized cost   6,152 6,292
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax   23 28
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value   973  
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss   (2)  
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss   230  
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss   (1)  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value   743  
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax   2 2
Available-for-sale Securities   $ 6,173 $ 6,318