CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (3,498)	$ (22,838)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities -
Loss on debt extinguishment	81
Depreciation and amortization	3,027	3,086
Amortization of debt discount	471	440
Noncash interest expense	280
Noncash lease expense	2,173	1,969
Provision for bad debts	40	538
Accretion of asset retirement obligation	526	566
Provision for deferred income taxes	246	13,856
Noncash compensation	2,360	44
Loss (gain) on sale of property and equipment	(78)	185
Changes in assets and liabilities
Accounts receivable	(6,036)	3,318
Prepaid expenses and other current assets	578	1,005
Other assets	(398)	138
Accounts payable and accrued liabilities	3,124	(9,108)
Deferred revenue	432	(138)
Other liabilities	849	(266)
Net cash (used in) provided by operating activities	4,177	(7,205)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(1,428)	(339)
Proceeds from the sale of property and equipment	146
Net cash used in investing activities	(1,282)	(339)
CASH FLOWS FROM FINANCING ACTIVITIES:
Payments of long-term debt	(3,000)	(1,837)
Proceeds from long-term debt	4,000	14,281
Payments for debt-related costs	(354)	(281)
Proceeds from issuance of class A common stock	180
Settlement of tax withholding obligations	(497)
Net cash provided by financing activities	329	12,163
INCREASE IN CASH AND CASH EQUIVALENTS	3,224	4,619
CASH AND CASH EQUIVALENTS:
Beginning of period	4,171	2,083
End of period	7,395	6,702
SUPPLEMENTAL DISCLOSURES:
Cash paid for interest	$ 4,626	$ 4,732