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Income Taxes - Significant Components of Deferred Income Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Deferred tax assets:
Share-based compensation	$ 2,729	$ 4,201
Employee compensation	758	950
Allowance for doubtful accounts	155	1,685
Deferred tuition revenue	147	1,294
Deferred scholarship		618
Intangibles		590
State taxes	713	985
Other	204	526
Deferred tax assets	4,706	10,849
Deferred tax liability:
Property and equipment	(8,335)	(28,028)
Goodwill	(762)	(762)
Other	(30)	(421)
Deferred tax liability	(9,127)	(29,211)
Net deferred tax liability	$ (4,421)	$ (18,362)

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