XML 96 R79.htm IDEA: XBRL DOCUMENT v3.10.0.1
Fair Value Measurement - Cash and Cash Equivalents (Details) - Fair Value, Measurements, Recurring [Member] - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Assets, Fair Value Disclosure    
Total Assets, Fair Value $ 90,438 $ 48,651
Other current liabilities 0  
Cash flow hedge 1,098  
Total liabilities 1,098  
Other current assets   0
Cash flow hedge   1,400
Level 1 [Member]    
Assets, Fair Value Disclosure    
Total Assets, Fair Value 90,438 47,251
Other current liabilities 0  
Cash flow hedge 0  
Total liabilities 0  
Other current assets   0
Cash flow hedge   0
Level 2 [Member]    
Assets, Fair Value Disclosure    
Total Assets, Fair Value 0 1,400
Other current liabilities 0  
Cash flow hedge 1,098  
Total liabilities 1,098  
Other current assets   0
Cash flow hedge   1,400
Level 3 [Member]    
Assets, Fair Value Disclosure    
Total Assets, Fair Value 0 0
Other current liabilities 0  
Cash flow hedge 0  
Total liabilities 0  
Other current assets   0
Cash flow hedge   0
Money Market Funds [Member]    
Assets, Fair Value Disclosure    
Cash equivalents 84,613 37,284
Money Market Funds [Member] | Level 1 [Member]    
Assets, Fair Value Disclosure    
Cash equivalents 84,613 37,284
Money Market Funds [Member] | Level 2 [Member]    
Assets, Fair Value Disclosure    
Cash equivalents 0 0
Money Market Funds [Member] | Level 3 [Member]    
Assets, Fair Value Disclosure    
Cash equivalents 0 0
Commercial paper [Member]    
Assets, Fair Value Disclosure    
Cash equivalents   9,967
Commercial paper [Member] | Level 1 [Member]    
Assets, Fair Value Disclosure    
Cash equivalents   9,967
Commercial paper [Member] | Level 2 [Member]    
Assets, Fair Value Disclosure    
Cash equivalents   0
Commercial paper [Member] | Level 3 [Member]    
Assets, Fair Value Disclosure    
Cash equivalents   $ 0
Restricted Cash [Member]    
Assets, Fair Value Disclosure    
Other noncurrent assets 5,825  
Restricted Cash [Member] | Level 1 [Member]    
Assets, Fair Value Disclosure    
Other noncurrent assets 5,825  
Restricted Cash [Member] | Level 2 [Member]    
Assets, Fair Value Disclosure    
Other noncurrent assets 0  
Restricted Cash [Member] | Level 3 [Member]    
Assets, Fair Value Disclosure    
Other noncurrent assets $ 0