Credit Losses (Tables)

6 Months Ended

Jun. 30, 2020

Accounts Receivable, Allowance for Credit Loss

The activity in the allowance for credit losses on the Company's trade receivables is as follows:


Balance at December 31, 2019	$	5,140
Provision for credit losses	4,298
Write-offs	(1,774)
Foreign currency translation	(597)
Balance at June 30, 2020	$	7,067

Debt Securities, Available-for-sale

The fair value and unrealized losses on available for sale debt securities, aggregated by investment category and the length of time the security has been in an unrealized loss position, are as follows:


	Less Than 12 Months						Balance Sheet Classification
Balance at June 30, 2020	Fair Value		Unrealized Loss		Cash and Cash Equivalents		Marketable Securities
U.S. Treasury securities	$	47,004	$	2	$	—	$	47,004

The unrealized losses on four investments in U.S. Treasury securities were caused by fluctuations in market interest rates. The contractual cash flows of these investments are guaranteed by an agency of the U.S. government. Accordingly, it is expected that the investments would not be settled at a price less than the amortized cost basis. The Company does not intend to sell the investments and it is not more likely than not that the Company will be required to sell the investments before the recovery of the amortized cost basis.