CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net loss	$ (12,585)	$ (12,876)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	12,061	11,273
Provision for bad debts	(392)	52
Stock-based compensation	588	609
Pension expense	0	347
Amortization of deferred financing costs	630	601
Interest income on interest rate swap	(356)	0
Accretion of contingent consideration	884	0
Increase in fair value of contingent consideration	190	138
Deferred income taxes	(1,781)	3,630
Loss on sales of property	49	0
Changes in operating assets and liabilities:
Accounts receivable	2,159	5,818
Inventories	823	3,497
Prepaid expenses and other current assets	986	(430)
Accounts payable	654	(7,853)
Accrued expenses and other liabilities	6,291	(9,426)
Income taxes payable	650	1,758
Other assets and liabilities	(1,873)	6,279
Net cash provided by operating activities	8,978	3,417
Cash flows from investing activities:
Cash paid for property and equipment	(2,586)	(1,905)
Other investments	(250)	0
Net cash used in investing activities	(2,836)	(1,905)
Cash flows from financing activities:
Payment of Dow liabilities settlement	0	(10,000)
Repayment of long-term debt	(722)	(1,407)
Net cash used in financing activities	(722)	(11,407)
Effect of exchange rate changes on cash and cash equivalents	(277)	2,324
Net increase (decrease) in cash and cash equivalents	5,143	(7,571)
Cash and cash equivalents, beginning of period	34,852	64,533
Cash and cash equivalents, end of period	39,995	56,962
Supplemental disclosures of cash flow information:
Cash paid for interest	27	7,242
Cash paid for income taxes	599	156
Supplemental schedule of non-cash investing and financing activities:
Accrued purchases of property and equipment	102	0
Right of use assets obtained in exchange for new lease liabilities	$ 33	$ 0