Cash, Cash Equivalents and Short-Term Investments (Tables)

3 Months Ended

Mar. 31, 2019

Cash Cash Equivalents And Short Term Investments [Abstract]

Summary of Cash and Cash Equivalents

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.

	March 31,		December 31,
	2019		2018
	Unaudited		Audited
Cash	$	9,104	$	9,197
Money market funds		142,963		131,425
Total cash and cash equivalents	$	152,067	$	140,622

Summary of Amortized Cost and Recorded Basis of T-bills in Short-Term Investments

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.

	March 31,		December 31,
	2019		2018
	Unaudited		Audited
Short-term investments	$	104,535	$	105,256