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Cash, Cash Equivalents and Short-Term Investments
9 Months Ended
Sep. 30, 2019
Cash, Cash Equivalents, and Short-term Investments [Abstract]  
Cash, Cash Equivalents and Short-Term investments CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS
Cash equivalents include items almost as liquid as cash, such as certificates of deposit and time deposits with maturity periods of three months or less when purchased.
September 30,
2019
December 31,
2018
UnauditedAudited
Cash$5,851  $9,197  
Money market funds202,183  131,425  
Total cash and cash equivalents$208,034  $140,622  
The Company invests in marketable U.S. Treasury Bills (“T-bills”) that are classified as held-to-maturity securities. The amortized cost and recorded basis of the T-bills are presented as short-term investments.
September 30,
2019
December 31,
2018
 UnauditedAudited
Short-term investments$104,565  $105,256  
Quoted market prices were applied to determine the fair value of cash equivalents and short-term investments, therefore they are categorized as Level 1 in accordance with ASC 820, “Fair Value Measurements and Disclosures.” The estimated fair value of the Company’s short-term investments as of September 30, 2019 and December 31, 2018 was $104,613 and $105,266, respectively.