UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenues:
Revenue from Contract with Customer, Product and Service [Extensible Enumeration]	Service revenue and other [Member]	Service revenue and other [Member]	Service revenue and other [Member]	Service revenue and other [Member]
Service revenue and other	$ 71,341	$ 66,021	$ 143,027	$ 130,435
Operating expenses:
Cost of services exclusive of depreciation and amortization	26,076	26,756	52,643	53,095
Selling, general and administrative	25,691	23,090	52,300	46,925
Restructuring expense	0	454	0	390
Impairment expense	836	4,068	1,020	4,407
Depreciation and amortization	16,369	14,790	31,967	29,135
Total operating expenses	68,972	69,158	137,930	133,952
Operating income (loss)	2,369	(3,137)	5,097	(3,517)
Other income (expense):
Other income (expense), net	177	(589)	1,294	(759)
Income (loss) before income taxes	2,546	(3,726)	6,391	(4,276)
Income tax expense (benefit)	756	(501)	2,535	(448)
Net income (loss)	1,790	(3,225)	3,856	(3,828)
Other comprehensive income:
Unrealized income on interest rate hedge, net of tax	2,127	0	2,127	0
Comprehensive income (loss)	$ 3,917	$ (3,225)	$ 5,983	$ (3,828)
Net income (loss) per share, basic and diluted:
Basic net income (loss) per share (in dollars per share)	$ 0.04	$ (0.06)	$ 0.08	$ (0.08)
Diluted net income (loss) per share (in dollars per share)	$ 0.04	$ (0.06)	$ 0.08	$ (0.08)
Weighted average shares outstanding, basic (in shares)	50,366	50,157	50,330	50,133
Weighted average shares outstanding, diluted (in shares)	50,693	50,157	50,569	50,133