CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Cash Flows [Abstract]
Net loss	$ (3,157)	$ (5,180)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	7,304	6,025
Profit on sale of property, plant and equipment	(251)	0
Provision for doubtful accounts	630	374
Share-based compensation expense	425	0
Deferred income taxes	(659)	(918)
Share of profit of affiliates	(342)	(64)
Changes in operating assets and liabilities:
Trade accounts receivable	4,384	4,992
Prepaid expenses and other assets	(8,789)	8,801
Accounts payable	(79)	1,486
Income taxes, net	(948)	(1,735)
Accrued and other liabilities	1,105	(10,023)
Net cash (used in) provided by operating activities	(377)	3,758
Investing Activities
Purchases of property, plant and equipment	(3,495)	(2,919)
Distributions received from affiliates	0	22
Net cash used in investing activities	(3,495)	(2,897)
Financing Activities
Proceeds from the issuance of common stock	515	0
Payments on long term debt	(1,400)	0
Proceeds from other debts, net	6,102	488
Net cash provided by financing activities	5,217	488
Net (decrease) increase in cash and cash equivalents	1,345	1,349
Effect of exchange rate changes on cash and cash equivalents and restricted cash	(226)	(31)
Cash and cash equivalents and restricted cash at beginning of period	24,569	21,601
Total cash and cash equivalents and restricted cash	25,688	22,919
Components of cash and cash equivalents and restricted cash
Balances with banks	14,595	17,693
Restricted cash	11,093	5,226
Total cash and cash equivalents and restricted cash	$ 25,688	$ 22,919