XML 18 R10.htm IDEA: XBRL DOCUMENT v3.19.3
Marketable Securities
 9 Months Ended
Sep. 30, 2019
Investments, Debt and Equity Securities [Abstract]  
Marketable Securities Marketable Securities
The following tables summarize the Company's marketable debt and equity securities (in thousands):
September 30, 2019
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
Government-sponsored enterprises$11,690  $5  $—  $11,695  
Corporate debt securities74,563  20  (2) 74,581  
Total marketable debt securities86,253  25  (2) 86,276  
Corporate equity securities19,102  —  (7,555) 11,547  
Total marketable securities$105,355  $25  $(7,557) $97,823  

December 31, 2018
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
Corporate debt securities$12,738  $—  $(3) $12,735  

All available-for-sale marketable debt securities held as of September 30, 2019 and December 31, 2018 had contractual maturities of less than one year. All of the Company's available-for-sale marketable debt securities in an unrealized loss position as of September 30, 2019 and December 31, 2018 were in a loss position for less than 12 months.  There were no unrealized losses on marketable debt securities at September 30, 2019 or December 31, 2018 that the Company determined to be other-than-temporary.
The Company recognizes changes in market value of equity securities as gains or losses in other income (expense) in the consolidated statement of operations and comprehensive loss. The unrealized loss on corporate equity securities of
$7.6 million was recognized as a loss in other income (expense) in the consolidated statement of operations and comprehensive loss during the three months ended September 30, 2019.