Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2020

Accounting Policies [Abstract]

Summary of stock-based compensation cost charged against income

Stock-based compensation expense for the three month period ended March 31, 2020 and 2019 is as follows (in thousands):

	Three Months Ended March 31,
	2020		2019
	(Unaudited)
Instructional costs and services	$	478	$	403
Selling and promotional	258		194
General and administrative	1,014		1,092
Stock-based compensation expense in operating income	$	1,750	$	1,689