XML 69 R34.htm IDEA: XBRL DOCUMENT v3.8.0.1
Organization and Significant Accounting Policies, Cash, Cash Equivalents and Short-Term Investments (Details)
Dec. 31, 2017
Company
Cash, Cash Equivalents and Investments [Abstract]  
Number of publicly-held companies in which there is an equity ownership interest of less than 20% 1
Number of privately-held companies in which there is an equity ownership interest of less than 20% 5