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Business Segment Information - Reconciliation of Reportable Segment Amounts (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Segment Reporting Information [Line Items]        
Segment reporting operating income (loss) $ (9,989) $ (10,279) $ (34,665) $ (26,268)
Corporate payroll and benefits 4,445 6,438 19,102 15,294
Corporate rent and occupancy 596 667 1,828 1,784
Corporate legal and professional fees 3,424 3,560 11,545 7,487
Corporate general and administrative 1,249 1,428 4,635 3,981
Depreciation and amortization 528 469 1,632 1,364
Interest income 2 14 20 61
Other expense (77) (9) 10 0
Income tax expense (44) (113) (151) (155)
Net loss (8,654) (3,699) (27,233) (3,290)
Operating Segments        
Segment Reporting Information [Line Items]        
Segment reporting operating income (loss) (1,966) 4,498 (1,039) 15,693
Segment Reconciling Items        
Segment Reporting Information [Line Items]        
Corporate payroll and benefits (2,341) (4,014) (11,852) (9,581)
Corporate rent and occupancy (202) (185) (503) (512)
Corporate legal and professional fees (3,150) (2,903) (10,514) (5,611)
Corporate general and administrative (740) (899) (2,731) (2,926)
Depreciation and amortization (143) (88) (448) (259)
Interest income 2 14 20 61
Other expense (70) (9) (15) 0
Income tax expense $ (44) $ (113) $ (151) $ (155)