CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net loss	$ (22,618)	$ (17,734)
Adjustments to reconcile net loss to net cash provided from operating activities:
Depreciation and amortization	9,330	10,137
Provision for doubtful accounts	(94)	2,360
Stock-based compensation expense	2,585	2,164
Benefit for deferred income taxes	(6,355)	(6,050)
Amortization of debt issuance costs	1,701	1,952
Loss on extinguishment of debt	16,998
Gain on sale and disposal of fixed assets	(594)	(672)
Changes in operating assets and liabilities
Accounts receivable, net	19,425	15,367
Inventories	1,085	(4,653)
Other current assets	650	39
Income taxes	12,255	849
Accounts payable	552	6,333
Accrued expenses and other current liabilities	(5,067)	(683)
Accrued compensation related costs	(35,789)	(19,171)
Other liabilities	(2,537)	(1,901)
Net cash used in operating activities	(8,473)	(11,663)
Cash flows from investing activities:
Purchase of property, plant and equipment	(4,388)	(2,348)
Purchase of therapeutic program equipment leased to third parties under operating leases	(2,034)	(629)
Purchase of company-owned life insurance investment	(598)	(555)
Proceeds from sale of property, plant and equipment	840	2,179
Net cash used in investing activities	(6,180)	(1,353)
Cash flows from financing activities:
Borrowings under term loan, net of discount	501,467
Repayment of term loan	(431,875)	(5,625)
Borrowings under revolving credit agreement	3,000	49,500
Repayments under revolving credit agreement	(8,000)	(31,500)
Payment of employee taxes on stock-based compensation	(2,150)	(1,338)
Payment on seller note and other contingent consideration	(1,749)	(3,498)
Payment of capital lease obligations	(364)	(278)
Payment of debt issuance costs	(6,757)
Payment of debt extinguishment costs	(8,436)
Net cash provided by financing activities	45,136	7,261
Increase (decrease) in cash, cash equivalents and restricted cash	30,483	(5,755)
Cash, cash equivalents and restricted cash, at beginning of period	4,779	9,412
Cash, cash equivalents and restricted cash, at end of period	35,262	3,657
Reconciliation of Cash, Cash Equivalents and Restricted Cash
Cash and cash equivalents, at beginning of period	1,508	7,157
Restricted cash, at beginning of period	3,271	2,255
Cash, cash equivalents and restricted cash, at beginning of period	4,779	9,412
Cash and cash equivalents, at end of period	32,913	1,414
Restricted cash, at end of period	2,349	2,243
Cash, cash equivalents and restricted cash, at end of period	$ 35,262	$ 3,657