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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income (loss) $ 28,037 $ (9,138)
Adjustments to reconcile net income to net cash provided by (used in) operating activities:    
Provision for bad debt 428
Provision for obsolete inventories (281)
Director share-based compensation 166
Depreciation and amortization 2,234 4,216
Change in fair value of investments (27)
Change in fair value of derivative liability (19) (42)
Change in fair value of warrant liability (12,598) 11,313
Change in fair value of earnout share liability (7,034) 7,672
Deferred income taxes (204) (854)
Changes in operating assets and liabilities:    
Trade accounts receivable (15,087) (12,894)
Inventories (8,887) (13,721)
Prepaid expenses and other current assets 816 198
Other assets (5,546) (4,297)
Trade accounts payable 16,043 12,685
Customer advances on uncompleted contracts 373 8,254
Related parties (4,839) (2,740)
Other current liabilities (5,487) 5,418
CASH (USED) PROVIDED BY OPERATING ACTIVITIES (7,373) 7,247
CASH FLOWS FROM INVESTING ACTIVITIES    
Proceeds from sale of investments 417 435
Proceeds from sale of property and equipment 34
Purchase of investments (22,765) (1,148)
Acquisition of property and equipment (5,113) (15,188)
CASH USED IN INVESTING ACTIVITIES (27,461) (15,867)
CASH FLOWS FROM FINANCING ACTIVITIES    
Proceeds from debt 156,200 57,462
Repayments of debt (109,993) (49,093)
CASH PROVIDED BY FINANCING ACTIVITIES 46,207 8,369
Effect of exchange rate changes on cash and cash equivalents (334) 339
NET INCREASE IN CASH 11,039 88
Cash and equivalents - Beginning of period 18,496 15,930
Cash and equivalents - End of period 29,535 16,018
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION    
Interest 4,063 3,239
Taxes 13,677 7,188
NON-CASH INVESTING AND FINANCING ACTIVITIES:    
Assets acquired under capital lease and debt $ 11,438 $ 20,180