Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Operating Activities
Net loss	$ (2,202)	$ (3,774)	$ (5,359)	$ (8,954)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization			14,631	10,749
Profit on sale of property, plant and equipment			(223)
Provision for doubtful accounts			1,169	412
Warrant contra revenue	730		730
Share-based compensation expense			781
Deferred income taxes			(1,224)	(1,203)
Share of profit of affiliates	(662)	25	(1,003)	(39)
Changes in operating assets and liabilities:
Trade accounts receivable			(1,218)	2,934
Prepaid expenses and other assets			(7,677)	17,303
Accounts payable			(2,091)	(1,565)
Income taxes, net			(2,663)	(1,508)
Accrued and other liabilities			(1,280)	(14,985)
Net cash (used in) provided by operating activities			(5,427)	3,144
Investing Activities
Purchases of property, plant and equipment			(7,302)	(2,353)
Distributions received from associates			1,329	18
Net cash used in investing activities			(5,973)	(2,335)
Financing Activities
Proceeds from the issuance of common stock			6,466
Payments on long term debt			(4,200)	(1,400)
Proceeds from (payments on) other debt, net			10,513	(3,290)
Net cash provided by (used in) financing activities			12,779	(4,690)
Net increase (decrease) in cash and cash equivalents			1,379	(3,881)
Effect of exchange rate changes on cash and cash equivalents and restricted cash			(40)	(27)
Cash and cash equivalents and restricted cash at beginning of period			24,569	21,601
Cash and cash equivalents and restricted cash at end of period	25,908	17,693	25,908	17,693
Components of cash and cash equivalents and restricted cash
Balances with banks	15,452	10,986	15,452	10,986
Restricted cash	10,456	6,707	10,456	6,707
Cash and cash equivalents and restricted cash at end of period	$ 25,908	$ 17,693	$ 25,908	$ 17,693