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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net loss $ (20,189,000) $ (18,469,000)
Adjustments to reconcile net loss to net cash provided by operating activities:    
Depreciation and amortization 23,376,000 23,603,000
Noncash compensation 433,000 734,000
Deferred income tax benefit (2,242,000) (9,597,000)
Gain on insurance proceeds from insurance settlement (909,000)  
Other 73,000 752,000
Change in current assets and liabilities:    
Decrease in accounts receivable 20,053,000 20,286,000
Decrease in prepaid expenses and other assets 2,172,000 1,044,000
Decrease in accounts payable (5,891,000) (4,381,000)
Increase (decrease) in accrued liabilities 794,000 (1,003,000)
Decrease in deferred revenue (1,446,000) (261,000)
Net cash provided by operating activities 16,224,000 12,708,000
CASH FLOWS FROM INVESTING ACTIVITIES:    
Cash acquired from merger   12,382,000
Capital expenditures, net of noncash capital expenditures summarized below (5,326,000) (4,083,000)
Proceeds from maturity of short-term investments 40,000,000 15,500,000
Acquisition of short-term investments (60,500,000) (6,250,000)
Proceeds from disposal of assets 1,594,000 696,000
Proceeds on flood insurance claim 909,000  
Net cash (used in) provided by investing activities (23,323,000) 18,245,000
CASH FLOWS FROM FINANCING ACTIVITIES:    
Proceeds from promissory note   5,144,000
Principal payments on notes payable (4,128,000) (11,829,000)
Principal payments on capital lease obligations (386,000) (797,000)
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 (4,545,000) (8,297,000)
Effect of exchange rate changes in cash and cash equivalents 330,000 (25,000)
Net (decrease) increase in cash and cash equivalents (11,314,000) 22,631,000
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD 37,009,000 14,644,000
CASH AND CASH EQUIVALENTS AT END OF PERIOD 25,695,000 37,275,000
SUPPLEMENTAL CASH FLOW INFORMATION:    
Cash paid for interest 168,000 337,000
Cash paid for income taxes 3,000 585,000
Cash received for income taxes $ 231,000 518,000
NONCASH INVESTING AND FINANCING ACTIVITIES:    
Increase in accrued purchases of property and equipment   16,000
Capital lease obligations incurred   126,000
Stock consideration to consummate the merger   $ 42,902,000