CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 2,015	$ (6,545)	$ (11,484)
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:
Depreciation and amortization	8,116	8,421	8,702
Amortization of deferred finance costs	190	369	583
Write-off of deferred finance charges	512	0	2,161
Deferred income taxes	153	0	(424)
(Gain) loss on disposition of assets	(567)	537	(1,623)
Fixed asset donation	(1,084)	0	(19)
Provision for doubtful accounts	20,847	17,705	13,720
Stock-based compensation expense	679	522	1,220
Deferred rent	0	(958)	(1,312)
(Increase) decrease in assets:
Accounts receivable	(25,986)	(23,836)	(15,733)
Inventories	(157)	206	30
Prepaid income taxes and income taxes receivable	219	29	55
Prepaid expenses and current assets	(502)	(109)	532
Other assets	(1,368)	(191)	(1,163)
Increase (decrease) in liabilities:
Accounts payable	444	3,753	(3,193)
Accrued expenses	(1,687)	(1,136)	(3,613)
Unearned tuition	866	(2,102)	(131)
Other liabilities	(1,702)	1,641	371
Total adjustments	(1,027)	4,851	163
Net cash provided by (used in) operating activities	988	(1,694)	(11,321)
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(5,385)	(4,697)	(4,755)
Proceeds from insurance settlement	575	0	0
Proceeds from sale of property and equipment	0	2,348	15,462
Net cash (used in) provided by investing activities	(4,810)	(2,349)	10,707
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from borrowings	40,045	31,000	75,900
Payments on borrowings	(54,514)	(35,099)	(66,766)
Payment of deferred finance fees	(975)	(94)	(1,241)
Net share settlement for equity-based compensation	(18)	(372)	(440)
Proceeds from sale of convertible preferred stock	12,700	0	0
Payment of convertible preferred stock issuance costs	(718)	0	0
Net cash (used in) provided by financing activities	(3,480)	(4,565)	7,453
NET (DECREASE) INCREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(7,302)	(8,608)	6,839
CASH, CASH EQUIVALENTS AND RESTRICTED CASH - Beginning of year	45,946	54,554	47,715
CASH, CASH EQUIVALENTS AND RESTRICTED CASH - End of year	38,644	45,946	54,554
Cash paid during the year for:
Interest	2,155	2,030	2,790
Income taxes	118	191	139
SUPPLEMENTAL SCHEDULE OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Liabilities accrued for or noncash purchases of fixed assets	$ 2,852	$ 265	$ 1,447