Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2019

Fair Value Disclosures [Abstract]

Schedule of Assets, Liabilities, and Equity Measured at Fair Value on a Recurring Basis

A summary of assets and liabilities as of September 30, 2019 and December 31, 2018, related to the Company's financial instruments measured at fair value on a recurring basis, is set forth below, along with the balance sheet accounts they are classified within:

	Balance as of September 30, 2019		Quoted Prices in Active Markets for Identical Assets  (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Cash equivalents
Money market funds	$	198,172	$	198,172	$	—	$	—
U.S. treasury securities	282		—		282		—
Short-term investments
U.S. treasury securities	62,054		—		62,054		—
Loans held for sale	22,246		—		22,246		—
Prepaid expenses and other current assets
Forward sales commitments	216		—		216		—
Interest rate lock commitments	603		—		—		603
Total prepaid expenses and other current assets	819		—		216		603
Long-term investments
U.S. treasury securities	38,480		—		38,480		—
Total assets	$	322,053	$	198,172	$	123,278	$	603
Liabilities
Accrued liabilities
Forward sales commitments	$	44	$	—	$	44	$	—
Interest rate lock commitments	124		—		—		124
Total liabilities	$	168	$	—	$	44	$	124

	Balance as of 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
Cash equivalents
Money market funds	$	425,776	$	425,776	$	—	$	—
Loans held for sale	4,913		—		4,913		—
Prepaid expenses and other current assets
Interest rate lock commitments	254		—		—		254
Total prepaid expenses and other current assets	254		—		—		254
Total assets	$	430,943	$	425,776	$	4,913	$	254
Liabilities
Accrued liabilities
Forward sales commitments	$	141	$	—	$	141	$	—
Total liabilities	$	141	$	—	$	141	$	—