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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net loss $ (32,605,000) $ (21,339,000)
Adjustments to reconcile net loss to net cash provided by operating activities:    
Depreciation and amortization 33,967,000 35,569,000
Noncash compensation 671,000 794,000
Deferred income tax benefit (3,676,000) (11,086,000)
Gain on insurance proceeds from insurance settlements (1,029,000)  
Loss on disposal of assets 468,000 1,392,000
Other 304,000 431,000
Change in current assets and liabilities:    
Decrease in accounts receivable 22,928,000 14,141,000
Decrease in prepaid expenses and other assets 2,173,000 1,684,000
Decrease in accounts payable (4,420,000) (2,787,000)
Increase (decrease) in accrued liabilities 31,000 (2,100,000)
Decrease in deferred revenue (4,386,000) 1,179,000
Net cash provided by operating activities 14,426,000 17,878,000
CASH FLOWS FROM INVESTING ACTIVITIES:    
Cash acquired from merger   12,382,000
Capital expenditures, net of noncash capital expenditures summarized below (6,198,000) (5,123,000)
Proceeds from maturity of short-term investments 63,500,000 21,500,000
Acquisition of short-term investments (86,750,000) (12,000,000)
Proceeds from disposal of assets 1,848,000 1,094,000
Proceeds on flood insurance claim 1,029,000  
Net cash (used in) provided by investing activities (26,571,000) 17,853,000
CASH FLOWS FROM FINANCING ACTIVITIES:    
Proceeds from promissory note   5,144,000
Principal payments on notes payable (6,090,000) (14,152,000)
Principal payments on capital lease obligations (608,000) (1,165,000)
Excess tax benefit from share-based payment arrangement   (567,000)
Tax withholdings related to stock based compensation awards (31,000) (248,000)
Net cash used in financing activities (6,729,000) (10,988,000)
Effect of exchange rate changes in cash and cash equivalents 128,000 (372,000)
Net (decrease) increase in cash and cash equivalents (18,746,000) 24,371,000
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD 37,009,000 14,644,000
CASH AND CASH EQUIVALENTS AT END OF PERIOD 18,263,000 39,015,000
SUPPLEMENTAL CASH FLOW INFORMATION:    
Cash paid for interest 227,000 491,000
Cash paid for income taxes 3,000 721,000
Cash received for income taxes $ 231,000 706,000
NONCASH INVESTING AND FINANCING ACTIVITIES:    
(Decrease) increase in accrued purchases of property and equipment   136,000
Capital lease obligations incurred   126,000
Stock consideration to consummate the merger   $ 42,902,000