Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
(Loss) income from continuing operations	$ (97,803)	$ 13,650
Loss from discontinued operations	(329)	(354)
Net (loss) income	(98,132)	13,296	[1]
Adjustments to reconcile net (loss) income to cash (used in) provided by
Depreciation and amortization	8,045	6,646
Provision (benefit) for allowance for doubtful accounts	52	(42)
Inventory lower-of-cost-or-market/NRV adjustments	692	255
Stock-based compensation expense	56	1,394
Loss on asset dispositions	1,127	32
Goodwill and intangible impairment charge	72,008	0
Deferred income taxes, net of valuation allowance of $5,083 and $1,045	(7,456)	1,476
Other	(115)	40
Changes in operating assets and liabilities:
Trade receivables	15,079	(3,352)
Inventories	18,284	(2,503)
Prepaids and other assets	4,168	1,075
Income taxes receivable	2,906	(4,712)
Trade payables	(48,973)	(525)
Accrued liabilities and other liabilities, including warranty obligations	(3,325)	(3,254)
Net cash (used in) provided by operating activities	(35,584)	9,826
Cash flows from investing activities:
Purchases of available-for-sale securities	0	(29,522)
Proceeds from sales and maturities of available-for-sale securities	25,271	46,475
Purchases of property, plant and equipment	(6,630)	(6,557)
Proceeds from sale of property, plant and equipment	0	4
Purchases of other investments in non-controlled affiliates	(3,500)	0
Net cash provided by investing activities	15,141	10,400
Cash flows from financing activities:
Proceeds from long-term debt	20,218	0
Payments on long-term debt	(31,667)	(12,000)
Payments for stock repurchases	0	(4,989)
Proceeds from employee stock purchases	168	232
Proceeds from exercise of stock options	75	338
Tax payments related to stock award issuances	(107)	(396)
Net cash used in financing activities	(11,313)	(16,815)
Effect of exchange rate changes on cash and cash equivalents	(613)	(551)
(Decrease) increase in cash and cash equivalents	(32,369)	2,860
Cash and cash equivalents:
Beginning of period	38,125	27,893
End of period	5,756	30,753
Supplemental disclosure of cash flow information:
Cash paid for interest	963	799
Cash (received) paid for income taxes, net	(2,203)	8,622
Supplemental disclosure of non-cash investing activities:
Capital expenditures incurred but not yet paid	$ 415	$ 1,352

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