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) income		$ (13,482)	$ (68,136)
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization		55,460	66,353
Accretion of contract rights under development agreements and placement fees	[1]	4,916	5,643
Amortization of deferred loan costs and discount		3,439	2,538
Stock-based compensation expense		8,856	4,726
Provision (benefit) for bad debts		313	1,133
Loss on disposition of long-lived assets		388	2,004
Impairment of assets		653	6
Fair value adjustment of contingent consideration		(56)	796
Provision for deferred income tax (benefit)		159	(518)
Changes in assets and liabilities that relate to operations:
Accounts receivable		(10,646)	19,391
Inventories		945	5,840
Prepaid expenses		(3,862)	(1,463)
Deposits and other		(3,565)	667
Other assets, non-current		3,054	1,955
Accounts payable and accrued liabilities		7,625	(21,216)
Net cash provided by operating activities		54,197	19,719
Cash flows from investing activities
Customer notes receivable		0	(4,690)
Proceeds from payments on customer notes receivable		0	279
Purchase of intangible assets		0	(1,414)
Software development and other expenditures		(11,329)	(8,004)
Proceeds from disposition of assets		35	32
Purchases of property and equipment		(24,938)	(12,196)
Net cash used in investing activities		(36,232)	(25,993)
Cash flows from financing activities
Payment of financed placement fee obligations		(3,690)	(4,179)
Proceeds from incremental term loans		0	92,150
Borrowing on revolver		0	30,000
Payment of deferred loan costs		(848)	(5,744)
Payments of previous acquisition obligation		(416)	(292)
Payments on finance leases and other obligations		(1,195)	(1,012)
Repurchase of stock		(905)	(483)
Proceeds from stock option exercise		0	158
Net cash (used in) provided by financing activities		(11,807)	106,320
Effect of exchange rates on cash and cash equivalents		(3)	(8)
Net increase in cash, cash equivalents and restricted cash		6,155	100,038
Cash, cash equivalents and restricted cash, beginning of period		81,709	13,182
Cash, cash equivalents and restricted cash, end of period		87,864	113,220
Non-cash investing and financing activities:
Leased assets obtained in exchange for new operating lease liabilities		3,042	0
Leased assets obtained in exchange for new finance lease liabilities		317	426
First Lien Credit Facilities [Member]
Cash flows from financing activities
Repayment of long-term debt		(4,040)	(4,040)
Incremental Term Loans [Member]
Cash flows from financing activities
Repayment of long-term debt		$ (713)	$ (238)

[1] Non-cash item related to the accretion of contract rights under development agreements and placement fees.