XML 41 R30.htm IDEA: XBRL DOCUMENT v3.7.0.1
Summary of Significant Accounting Policies - Assets and Liabilities Measured on a Recurring Basis (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Level 1    
Assets:    
Assets, fair value disclosure $ 46,544 $ 22,189
Liabilities:    
Liabilities, fair value disclosure 0 0
Level 3    
Assets:    
Assets, fair value disclosure 0 0
Liabilities:    
Liabilities, fair value disclosure $ 82 $ 133