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Fair Value Measurements (Tables)
 9 Months Ended
Sep. 30, 2018
Fair Value Disclosures [Abstract]  
Schedule of assets and liabilities measured at fair value on recurring basis
The following tables present financial assets and liabilities at September 30, 2018 and December 31, 2017 for which the Company measures fair value on a recurring basis, by level, within the fair value hierarchy:
September 30, 2018
Total
 
Level 1
 
Level 2
 
Level 3
 
Valuation
Technique
Assets
 
 
 
 
 
 
 
 
 
Money market mutual funds
$
336

 
$
336

 
$
—

 
$
—

 
(a)
Liabilities
 
 
 
 
 
 
 
 
 
Interest rate swaps
20

 
—

 
20

 
—

 
(b)
December 31, 2017
Total
 
Level 1
 
Level 2
 
Level 3
 
Valuation
Technique
Assets
 
 
 
 
 
 
 
 
 
Money market mutual funds
$
7,318

 
$
7,318

 
$
—

 
$
—

 
(a)
Certificates of deposit
1,001

 
1,001

 
—

 
—

 
(a)
Liabilities
 
 
 
 
 
 
 
 
 
Interest rate swaps
69

 
—

 
69

 
—

 
(b)