Fair Value Measurements

12 Months Ended

Dec. 31, 2018

Fair Value Disclosures [Abstract]

Fair Value Measurements

4. Fair Value Measurements

The Company measures certain financial assets and liabilities at fair value on a recurring basis, including cash equivalents, short-term and long-term investments and contingent consideration. The fair value of these financial assets and liabilities was determined based on three levels of input as follows:

• Level 1. Quoted prices in active markets for identical assets and liabilities;

• Level 2. Observable inputs other than quoted prices in active markets; and

• Level 3. Unobservable inputs.

The fair value hierarchy of the Company’s financial assets and liabilities carried at fair value and measured on a recurring basis is as follows:

			Fair Value Measurements at Reporting Date Using
	December 31, 2018		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Money market funds(1)	$	15,070	$	15,070	$	—	$	—
Short-term investments(2)		500		—		500		—
Long-term investments(2)		—		—		—		—
Total assets	$	15,570	$	15,070	$	500	$	—

			Fair Value Measurements at Reporting Date Using
	December 31, 2017		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Money market funds(1)	$	7,155	$	7,155	$	—	$	—
Short-term investments(2)		7,650		—		7,650		—
Long-term investments(2)		496		—		496		—
Total assets	$	15,301	$	7,155	$	8,146	$	—

(1) Included in cash and cash equivalents on the accompanying consolidated balance sheets; valued at quoted market prices in active markets.

(2) Short-term and long-term investments consist of municipal bonds, corporate bonds, U.S. Treasury securities, and government agency bonds; their fair value is calculated using an interest rate yield curve for similar instruments.