Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating activities
Net income (loss)	$ (13,473)	$ 31,667	$ 40,518
Adjustments to reconcile net (loss) income to net cash flows from operating activities:
Depreciation, amortization and accretion	24,689	13,379	13,929
Impairment of long-lived assets	9,935	0	0
Amortization of debt related costs	119	978	1,279
Changes in fair value of contingent assets and liabilities	(2,000)	0	0
Loss on extinguishment of debt	0	3,196	0
Provision for excess and obsolete inventory	2,365	1,851	2,875
Stock-based compensation	14,075	12,492	8,718
Loss on disposal of assets	2,250	286	842
Deferred taxes	(1,334)	9,725	5,762
Long-term income tax receivable	(2,218)	10,635	(2,855)
Long-term income tax payable and other long-term liabilities	2,828	(13,156)	3,219
Other	1,525	282	878
Increases (decreases) in cash from operating assets and liabilities:
Accounts receivable	(7,462)	156	(3,985)
Inventory	(8,459)	1,994	(8,690)
Other current assets	1,941	(2,411)	(661)
Accounts payable	(4,224)	3,233	(2,886)
Accrued expenses and other liabilities	(4,161)	6,077	2,250
Net cash provided by operating activities	16,396	80,384	61,193
Investing activities
Capital expenditures	(12,474)	(22,061)	(20,132)
Proceeds from sale of assets	0	0	1,000
Lending on bridge loan	(10,000)	0	0
Cash acquired in acquisition of business	17,562	0	0
Net cash used in investing activities	(4,912)	(22,061)	(19,132)
Financing activities
Proceeds from issuance of common stock	683	573	428
Equity issuance costs	(3,777)	0	0
Proceeds from issuance of long-term debt	0	199,461	0
Payments on long-term debt and other borrowings	(15,491)	(275,376)	(2,862)
Deferred financing costs	(1,224)	(2,258)	0
Proceeds from stock option exercises	77	1,173	1,152
Payments for minimum statutory tax withholding related to net share settlement of equity awards	(2,129)	(2,454)	(3,386)
Net cash used in financing activities	(21,861)	(78,881)	(4,668)
Effect of foreign exchange rates on cash and cash equivalents	152	76	(282)
Net (decrease) increase in cash and cash equivalents and restricted cash	(10,225)	(20,482)	37,111
Cash and cash equivalents and restricted cash, beginning of year	92,919	113,401	76,290
Cash and cash equivalents and restricted cash, end of year	82,694	92,919	113,401
Reconciliation to amounts within the consolidated balance sheets
Cash, cash equivalents and restricted cash at end of period	92,919	113,401	113,401
Supplemental disclosure of cash flow information
Interest	9,368	12,253	15,869
Income taxes, net of refunds of $331, $2 and $35, respectively	340	274	90
Schedule of non-cash investing and financing activities
Additions of property, plant and equipment included in liabilities	2,227	4,175	7,395
Consideration transferred in acquisition	$ 419,009	$ 0	$ 0