REVENUE AND DEFERRED REVENUE (Tables)

3 Months Ended

Mar. 31, 2020

Revenue From Contract With Customer [Abstract]

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction

The opening and closing balances of the Company’s accounts receivable and deferred revenue are as follows:

	Accounts Receivable			Deferred Revenue (current)			Deferred Revenue (non-current)
Opening balance as of January 1, 2020	$	22,919		$	119,851		$	57,766
Increase/(decrease), net		(7,528	)		(13,882	)		270
Ending balance as of March 31, 2020	$	15,391		$	105,969		$	58,036

The following table sets forth deferred revenue by reportable segment which represents the Company's unfulfilled performance obligations as of March 31, 2020 and the estimated revenue expected to be recognized in the future related to these performance obligations:

	As of March 31, 2020
	Total		Less than 1 Year		1-3 Years		3-5 Years		More than 5 Years
Literacy	$	41,256	$	32,782	$	8,089	$	381	$	4
E&E Language		55,065		33,498		8,961		2,743		9,863
Consumer Language		67,684		39,689		15,189		1,822		10,984
Total	$	164,005	$	105,969	$	32,239	$	4,946	$	20,851