Consolidated Statements of Cash Flows $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Cash flows from operating activities
Net income (loss)	$ (28,462)	$ 13,811	$ 6,223
Adjustments to reconcile net income to net cash from operating activities
Depreciation and amortization	24,699	18,659	20,124
Amortization of debt costs and other assets	3,778	1,024	1,712
Provision for doubtful accounts	1,891	(599)	1,639
Deferred income taxes	1,393	(2,661)	21,286
Share-based compensation	21,540	18,930	12,557
Interest and loss on the valuation of investment securities	5,000	3,050	5,585
Change in fair value of contingent consideration	29,140	3,069
Other	2,433	1,633	1,398
Changes in operating assets and liabilities, net of effects of acquisitions
Trade accounts receivable	(11,037)	(3,706)	(6,562)
Inventories	(5,712)	9,698	(15,645)
Prepaid expenses and other current assets	(3,698)	(1,127)	(6,352)
Trade accounts payable	2,138	(170)	2,324
Other current liabilities	(7,716)	(7,563)	(11,412)
Contingent consideration milestone payment	(1,340)
Other long-term assets and liabilities	(2,014)	(4,130)	6,095
Net cash from operating activities	32,033	49,918	38,972
Cash flows from investing activities
Acquisition of business, net of cash acquired		(44,294)
Capital expenditures for property, plant and equipment	(18,997)	(13,592)	(14,665)
Capital expenditures for intangible assets	(1,527)	(1,664)	(2,283)
Asset acquisitions and other investments	(2,400)	(1,448)	474
Net cash from investing activities	(22,924)	(60,998)	(16,474)
Cash flows from financing activities
Proceeds from issuance of common shares	11,551	7,100	7,783
Payments related to withholdings for share-based compensation	(5,193)	(3,425)	(3,800)
Contingent consideration milestone payment	(13,660)
Payments related to finance lease obligation	(365)
Payment of debt issuance costs and other financing activities	(3,021)	(682)	(445)
Net cash from financing activities	(10,688)	2,993	3,538
Effect of exchange rate changes on cash and restricted cash	(207)	(881)	1,180
Net change in cash, cash equivalents, and restricted cash	(1,786)	(8,968)	27,216
Cash, cash equivalents, and restricted cash at the beginning of the year	72,189	81,157	53,941
Cash, cash equivalents, and restricted cash at the end of the year	70,403	72,189	81,157
Components of cash, cash equivalents, and restricted cash at the end of the year
Cash and cash equivalents	69,719	69,623	81,157
Restricted cash	684	2,566
Cash, cash equivalents, and restricted cash at the end of the year	70,403	72,189	$ 81,157
Noncash investing activities:
Intangible assets acquired in asset acquisitions	$ 1,600	2,015
Contingent consideration recognized at acquisition date		$ 25,491