Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Operating activities
Net income	$ 9,109,000	$ 5,932,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	6,729,000	7,994,000
Stock-based compensation	3,323,000	3,319,000
Equity investment loss	0	1,481,000
Deferred income taxes	2,570,000	891,000
Loss on disposals of long-lived assets	324,000	130,000
Impairment of goodwill	0	5,855,000
Other	10,000	62,000
Changes in operating assets and liabilities:
Accounts receivable, net of allowance for bad debt	4,403,000	7,646,000
Prepaid expenses	(2,727,000)	(2,407,000)
Income tax receivable/payable	(844,000)	(3,864,000)
Operating leases, net	53,000	364,000
Other assets	(317,000)	292,000
Accounts payable	1,202,000	(4,187,000)
Accrued compensation and benefits	3,352,000	(3,612,000)
Accrued liabilities	1,201,000	3,080,000
Deferred revenue and student deposits	3,357,000	744,000
Net cash provided by operating activities	31,745,000	23,720,000
Investing activities
Capital expenditures	(2,893,000)	(2,957,000)
Net cash used in investing activities	(2,893,000)	(2,957,000)
Financing activities
Cash paid for repurchase of common stock	(15,554,000)	(12,061,000)
Net cash used in financing activities	(15,554,000)	(12,061,000)
Net increase in cash, cash equivalents, and restricted cash	13,298,000	8,702,000
Cash, cash equivalents, and restricted cash at beginning of period	202,740,000	212,131,000
Cash, cash equivalents, and restricted cash at end of period	216,038,000	220,833,000
Supplemental disclosure of cash flow information
Income taxes paid	$ 1,780,000	$ 4,809,000