XML 49 R39.htm IDEA: XBRL DOCUMENT v3.7.0.1
Marketable Securities Maturity Schedule (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Debt Securities, Amortized Cost Basis $ 13,774 $ 25,712
Available-for-sale Securities 13,771 25,712
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 0 0
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax (3) 0
Mutual Funds, Money Market [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Debt Securities, Amortized Cost Basis 8,031 21,848
Available-for-sale Securities 8,031 21,848
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 0 0
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax 0 0
US Treasury Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Debt Securities, Amortized Cost Basis 4,014  
Available-for-sale Securities 4,011  
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 0  
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax (3)  
Debt Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis 5,743 3,864
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value 5,740 3,864
Certificates of Deposit    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Debt Securities, Amortized Cost Basis 1,729 3,864
Available-for-sale Securities 1,729 3,864
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 0 0
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax $ 0 $ 0