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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net loss $ (8,600,000) $ (6,592,000)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:    
Depreciation and amortization 12,045,000 11,223,000
Noncash compensation 197,000 531,000
Deferred income tax benefit (1,033,000) (3,418,000)
Gain on insurance proceeds from insurance settlement (909,000)  
Other 111,000 (39,000)
Change in current assets and liabilities:    
Decrease (increase) in accounts receivable 8,980,000 (6,211,000)
Decrease (increase) in prepaid expenses and other assets 545,000 (819,000)
(Decrease) increase in accounts payable (4,249,000) 2,259,000
Increase (decrease) in accrued liabilities 2,207,000 (192,000)
Decrease in deferred revenue (531,000) (4,000)
Net cash provided by (used in) operating activities 8,763,000 (3,262,000)
CASH FLOWS FROM INVESTING ACTIVITIES:    
Cash acquired from merger   12,382,000
Capital expenditures, net of noncash capital expenditures summarized below (4,232,000) (1,189,000)
Proceeds from maturity of short-term investments 20,000,000 6,750,000
Acquisition of short-term investments (31,250,000) (5,500,000)
Proceeds from disposal of assets 1,201,000 603,000
Proceeds on flood insurance claim 909,000  
Net cash (used in) provided by investing activities (13,372,000) 13,046,000
CASH FLOWS FROM FINANCING ACTIVITIES:    
Principal payments on notes payable (2,063,000) (2,847,000)
Principal payments on capital lease obligations (192,000) (378,000)
Excess tax benefit from share-based payment arrangement   (340,000)
Tax withholdings related to stock based compensation awards   (120,000)
Net cash used in financing activities (2,255,000) (3,685,000)
Effect of exchange rate changes in cash and cash equivalents 233,000 (101,000)
Net (decrease) increase in cash and cash equivalents (6,631,000) 5,998,000
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD 37,009,000 14,644,000
CASH AND CASH EQUIVALENTS AT END OF PERIOD 30,378,000 20,642,000
SUPPLEMENTAL CASH FLOW INFORMATION:    
Cash paid for interest 96,000 152,000
Cash paid for income taxes 2,000 215,000
Cash received for income taxes $ 156,000 520,000
NONCASH INVESTING AND FINANCING ACTIVITIES:    
Increase in accrued purchases of property and equipment   19,000
Capital lease obligations incurred   126,000
Stock consideration to consummate the merger   $ 42,902,000