Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2018

Significant Accounting Policies [Abstract]

Schedule of cash, cash equivalents, and restricted cash

The following table illustrates the reconciliation of cash, cash equivalents, and restricted cash shown in the unaudited condensed consolidated statements of cash flows as of September 30, 2017 and 2018 (in thousands):

	As of September 30,
	2017		2018
Cash and cash equivalents	$	150,483	$	276,382
Restricted cash included in other current assets		9		15
Restricted cash included in other long-term assets		500		500
Total cash, cash equivalents, and restricted cash shown in the statement of cash flows	$	150,992	$	276,897

Schedule of tuition receivable and allowance for doubtful accounts

The Company’s tuition receivable and allowance for doubtful accounts were as follows as of December 31, 2017 and September 30, 2018 (in thousands):

	December 31, 2017		September 30, 2018
Tuition receivable	$	35,809	$	77,922
Allowance for doubtful accounts		(12,687)		(25,395)
Tuition receivable, net	$	23,122	$	52,527

Schedule of allowance for doubtful accounts

The following table illustrates changes in the Company’s allowance for doubtful accounts for the three and nine months ended September 30, 2017 and 2018 (in thousands):

	For the three months ended				For the nine months ended
	September 30,				September 30,
	2017		2018		2017		2018
Allowance for doubtful accounts, beginning of period	$	11,760	$	15,048	$	10,201	$	12,687
Additions charged to expense		5,364		9,864		14,835		22,851
Additions from merger		—		6,601		—		6,601
Write-offs, net of recoveries		(4,567)		(6,118)		(12,479)		(16,744)
Allowance for doubtful accounts, end of period	$	12,557	$	25,395	$	12,557	$	25,395

Schedule of reconciliation of shares used to calculate basic and diluted earnings (loss) per share

Set forth below is a reconciliation of shares used to calculate basic and diluted earnings (loss) per share for the three and nine months ended September 30, 2017 and 2018 (in thousands):

	For the three months ended		For the nine months ended
	September 30,		September 30,
	2017	2018	2017	2018
Weighted average shares outstanding used to compute basic earnings per share	10,701	17,799	10,671	13,141
Incremental shares issuable upon the assumed exercise of stock options	38	—	38	—
Unvested restricted stock and restricted stock units	471	—	465	—
Shares used to compute diluted earnings (loss) per share	11,210	17,799	11,174	13,141