Investments	6 Months Ended
Jun. 30, 2016
Investments, All Other Investments [Abstract]
Investments	Investments Investments in Privately-held Companies As of June 30, 2016 and December 31, 2015, we held non-marketable equity investments of approximately $36.1 million and $33.6 million, respectively, in privately-held companies which are accounted for under the cost method. During the quarter ended June 30, 2016 we made an additional investment of $2.5 million in one of these companies, which was accounted for under the cost method. There were no impairments recognized on our investments for the six months ended June 30, 2016. Notes Receivable As of June 30, 2016 and December 31, 2015, we have a $3.0 million promissory note with a privately-held company, which was recorded at cost. The interest rate on the promissory note is 8.0% per annum and is payable quarterly. All unpaid principal and accrued interest on the promissory note is due and payable on the earlier of August 26, 2017 or upon a default.

Investments

6 Months Ended

Jun. 30, 2016

Investments, All Other Investments [Abstract]

Investments in Privately-held Companies

As of June 30, 2016 and December 31, 2015, we held non-marketable equity investments of approximately $36.1 million and $33.6 million, respectively, in privately-held companies which are accounted for under the cost method. During the quarter ended June 30, 2016 we made an additional investment of $2.5 million in one of these companies, which was accounted for under the cost method. There were no impairments recognized on our investments for the six months ended June 30, 2016.

Notes Receivable

As of June 30, 2016 and December 31, 2015, we have a $3.0 million promissory note with a privately-held company, which was recorded at cost. The interest rate on the promissory note is 8.0% per annum and is payable quarterly. All unpaid principal and accrued interest on the promissory note is due and payable on the earlier of August 26, 2017 or upon a default.