Condensed Consolidated Statements of Cash Flows - Unaudited - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jul. 01, 2016
Cash flows from operating activities:
Net income (loss)	$ (1,349)	$ (13,430)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	49,465	45,048
Debt related amortization included in interest expense	6,241	3,581
Stock-based compensation	7,950	4,962
Other non-cash (gains) losses	11,367	(108)
Deferred income taxes	(2,447)	(3,776)
Changes in operating assets and liabilities:
Accounts receivable	(6,313)	11,858
Inventories	(9,451)	(23,919)
Prepaid expenses and other current assets	2,515	(3,124)
Accounts payable	15,373	12,844
Accrued expenses	215	(3,865)
Income taxes	3,599	3,683
Net cash provided by operating activities	77,165	33,754
Cash flows from investing activities:
Acquisition of property, plant and equipment	(22,438)	(30,402)
Purchase of cost and equity method investments	(497)	(2,198)
Other investing activities	672	(682)
Net cash used in investing activities	(22,263)	(33,282)
Cash flows from financing activities:
Principal payments of long-term debt	(118,839)	(16,500)
Proceeds from issuance of long-term debt	50,000	57,000
Proceeds from the exercise of stock options	8,725	610
Payment of debt issuance costs	(1,789)	(781)
Distribution of cash and cash equivalents to Nuvectra Corporation	0	(76,256)
Purchase of non-controlling interests	0	(6,818)
Other financing activities	0	(3,983)
Net cash used in financing activities	(61,903)	(46,728)
Effect of foreign currency exchange rates on cash and cash equivalents	1,418	368
Net decrease in cash and cash equivalents	(5,583)	(45,888)
Cash and cash equivalents, beginning of period	52,116	82,478
Cash and cash equivalents, end of period	$ 46,533	$ 36,590