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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net loss $ (12,725) $ (6,772)
Adjustments to reconcile net loss to net cash provided by operating activities:    
Depreciation and amortization 3,421 2,609
Non-cash interest expenses and related amortization 733 584
Share-based payments 7,312 7,378
Non-cash loss on exchange of warrants   297
Write-off of long-lived assets 3,626  
Provision for bad debts (39) (90)
Deferred income tax benefit   (3,536)
Changes in assets and liabilities:    
Accounts receivable 3,046 666
Prepaid expenses and other current assets (336) 531
Other non-current assets 131 (833)
Trade accounts payable (3,226) 436
Accrued expenses and other current liabilities (514) (365)
Deferred revenue 763 (452)
Net cash provided by operating activities 2,192 453
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchase of property and equipment (262) (177)
Capitalized costs included in intangible assets (2,078) (3,037)
Net cash used in investing activities (2,340) (3,214)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Proceeds for debt obligations, net of debt costs 14,039  
Repayments of long-term debt (1,798) (563)
Taxes paid related to net share settlement of vesting of restricted stock units (168)  
Net cash provided by (used in) financing activities 12,073 (563)
Net increase (decrease) in cash and cash equivalents 11,925 (3,324)
Cash and cash equivalents at beginning of period 10,089 13,462
Cash and cash equivalents at end of period 22,014 10,138
SUPPLEMENTAL DISCLOSURE INFORMATION    
Cash paid for interest 1,247 1,276
Share-based compensation expenses capitalized in intangible assets $ 246 278
Issuance of common stock to a vendor for services rendered   $ 131