CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating Activities
Net income (loss)	$ (10,026)	$ 1,793
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	2,643	2,962
Impairment losses	3,386	0
Share-based compensation expense	262	229
Warrant contra revenue	2,500	0
Changes in operating assets and liabilities:
Trade accounts receivable	(1,001)	5,545
Prepaid expenses and other assets	88	(214)
Accounts payable	326	18
Accrued and other liabilities	(1,796)	(3,150)
Net cash (used in) provided by operating activities	(3,618)	7,183
Investing Activities
Proceeds from sale of assets	0	342
Purchases of property, plant and equipment	(1,944)	(1,113)
Net cash used in investing activities	(1,944)	(771)
Financing Activities
Proceeds from the issuance of common stock	190	98
Proceeds from line of credit	83,532	79,675
Principal payments on line of credit	(77,890)	(84,980)
Principal payments on other debt	(733)	(868)
Net cash provided by (used in) financing activities	5,099	(6,075)
Effect of exchange rate changes on cash	203	(12)
Net (decrease) increase in cash and cash equivalents	(260)	325
Cash and cash equivalents at beginning of period	1,456	1,039
Cash and cash equivalents at end of period	$ 1,196	$ 1,364