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Summary of Significant Accounting Policies - Income Statement Restatements (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Error Corrections and Prior Period Adjustments Restatement [Line Items]                  
Product sales and services         $ 147,222 $ 172,288 $ 12,193    
Total revenues         150,246 173,009 14,975    
Cost of products and services sold         13,248 11,410 3,383    
Total operating expenses         155,211 102,251 108,632    
Operating income (loss)         (4,965) 70,758 (93,657)    
Income (loss) before income taxes         (9,718) 77,705 (90,131)    
Income tax provision (benefit)         31,558 35,907 (644)    
Net income (loss) from continuing operations         (41,276) 41,798 (89,487)    
Net income (loss)         $ (41,276) $ 41,798 $ (85,469)    
Net income (loss) per share - basic (in usd per share)         $ (1.00) $ 1.03 $ (2.36)    
Net income (loss) per share - diluted (in usd per share)         $ (1.00) $ 0.96 $ (2.36)    
As Filed                  
Error Corrections and Prior Period Adjustments Restatement [Line Items]                  
Product sales and services           $ 172,488 $ 11,993    
Total revenues           173,209 14,775    
Cost of products and services sold           10,921      
Total operating expenses           101,762      
Operating income (loss)           71,447 (93,857)    
Income (loss) before income taxes           78,394 (90,331)    
Income tax provision (benefit)           37,735 (1,407)    
Net income (loss) from continuing operations           40,659 (88,924)    
Net income (loss)           $ 40,659 $ (84,906)    
Net income (loss) per share - basic (in usd per share)           $ 1.00 $ (2.34)    
Net income (loss) per share - diluted (in usd per share)           $ 0.93 $ (2.34)    
(a) | Correction of Immaterial Errors                  
Error Corrections and Prior Period Adjustments Restatement [Line Items]                  
Product sales and services           $ 0      
Total revenues           0      
Cost of products and services sold           0      
Total operating expenses           0      
Operating income (loss)           0      
Income (loss) before income taxes           0      
Income tax provision (benefit) $ 434 $ (863) $ (292) $ (866)   (1,587)      
Net income (loss) from continuing operations           1,587      
Net income (loss)           $ 1,587      
Net income (loss) per share - basic (in usd per share)           $ 0.04      
Net income (loss) per share - diluted (in usd per share)           $ 0.04      
(b) | Correction of Immaterial Errors                  
Error Corrections and Prior Period Adjustments Restatement [Line Items]                  
Product sales and services           $ (200) $ 200    
Total revenues       200   (200) 200    
Cost of products and services sold           0      
Total operating expenses           0      
Operating income (loss)           (200) 200    
Income (loss) before income taxes           (200) 200    
Income tax provision (benefit)           (70) 70    
Net income (loss) from continuing operations           (130) 130    
Net income (loss)           $ (130) $ 130    
Net income (loss) per share - basic (in usd per share)           $ 0.00 $ 0.00    
Net income (loss) per share - diluted (in usd per share)           $ 0.00 $ 0.00    
(c) | Correction of Immaterial Errors                  
Error Corrections and Prior Period Adjustments Restatement [Line Items]                  
Product sales and services           $ 0      
Total revenues           0      
Cost of products and services sold           489      
Total operating expenses           489      
Operating income (loss)           (489)      
Income (loss) before income taxes           (489)      
Income tax provision (benefit)           (171)      
Net income (loss) from continuing operations           (318)      
Net income (loss)           $ (318)      
Net income (loss) per share - basic (in usd per share)           $ (0.01)      
Net income (loss) per share - diluted (in usd per share)           $ (0.01)      
(f) | Correction of Immaterial Errors                  
Error Corrections and Prior Period Adjustments Restatement [Line Items]                  
Product sales and services             $ 0    
Total revenues             0    
Operating income (loss)             0    
Income (loss) before income taxes             0    
Income tax provision (benefit) $ (2,606) $ (750) $ (1,026) $ (830)     693 $ (333) $ (360)
Net income (loss) from continuing operations             (693)    
Net income (loss)             $ (693)    
Net income (loss) per share - basic (in usd per share)             $ (0.02)    
Net income (loss) per share - diluted (in usd per share)             $ (0.02)