XML 51 R38.htm IDEA: XBRL DOCUMENT v3.8.0.1
Summary of Significant Accounting Policies - EPS and SBC (Details)
1 Months Ended 6 Months Ended 12 Months Ended
Jun. 13, 2017
shares
Dec. 09, 2016
shares
Jun. 30, 2017
$ / shares
shares
Feb. 28, 2017
$ / shares
shares
Sep. 30, 2016
shares
Aug. 31, 2016
$ / shares
shares
Dec. 31, 2016
USD ($)
item
$ / shares
shares
Dec. 31, 2015
$ / shares
shares
Dec. 31, 2017
USD ($)
item
$ / shares
shares
Jun. 30, 2016
USD ($)
item
$ / shares
shares
Jun. 30, 2015
USD ($)
$ / shares
shares
Computation of Net Loss per Common Share                      
Options outstanding to purchase common stock and unvested restricted stock             13,878,000   14,290,000 11,919,000 9,739,000
Common stock equivalents under treasury stock method for options and unvested restricted stock (in shares)             1,000   1,579,000 735,000 770,000
Shares issuable upon conversion of convertible notes (in shares) | item             23,878,000   501,000 23,878,000  
Common stock equivalents under if-converted method for convertible notes (in shares)             23,878,000   501,000 718,000  
Weighted-average assumptions used to estimate the fair value of each stock option                      
Dividend (as a percent)             0.00%        
Volatility (as a percent)             65.63%        
Risk-free interest rate (as a percent)             1.29%        
Expected life             6 years 3 months 18 days        
Additional disclosure for options                      
Cash received for exercise of stock options | $                 $ 650,000 $ 5,161,000 $ 4,429,000
Stock compensation expense (reduction) | $             $ 8,100,000   $ 11,100,000 $ 21,900,000 $ 15,300,000
Estimated fair value of unvested employee awards, net of estimated forfeitures | $             $ 11,600,000        
Weighted average vesting period of unvested employee awards             2 years        
Stock options                      
Weighted-average assumptions used to estimate the fair value of each stock option                      
Dividend (as a percent)                 0.00% 0.00% 0.00%
Volatility (as a percent)                 67.34% 66.34% 60.86%
Risk-free interest rate (as a percent)                 2.00% 1.80% 1.84%
Expected life                 6 years 6 years 3 months 18 days 6 years 3 months 18 days
Weighted-average grant date fair value (in dollars per share) | $ / shares             $ 1.76 $ 6.04 $ 1.98 $ 8.91  
Number of Stock Options                      
Outstanding at the beginning of the period (in shares)             11,813,000 9,689,000 13,679,000 9,689,000  
Granted (in shares)             3,536,000   1,589,000 3,340,000  
Exercised (in shares)                 (191,000) (555,000)  
Forfeited/Canceled (in shares)             (1,670,000)   (3,106,000) (661,000)  
Outstanding at the end of the period (in shares)             13,679,000   11,971,000 11,813,000 9,689,000
Vested or unvested and expected to vest at the end of the period (in shares)             13,516,000   11,881,000 11,475,000  
Exercisable at the end of the period (in shares)             7,898,000   7,996,000 6,453,000 5,380,000
Weighted-Average Exercise Price                      
Outstanding at the beginning of the period (in dollars per share) | $ / shares             $ 13.03 $ 12.49 $ 10.70 $ 12.49  
Granted (in dollars per share) | $ / shares             2.90   3.21 14.34  
Exercised (in dollars per share) | $ / shares                 3.42 9.30  
Forfeited/Canceled (in dollars per share) | $ / shares             10.64   10.33 14.84  
Outstanding at the end of the period (in dollars per share) | $ / shares             10.70   9.92 13.03 $ 12.49
Vested or unvested and expected to vest at the end of the period (in dollars per share) | $ / shares             10.76   9.96 13.05  
Exercisable at the end of the period (in dollars per share) | $ / shares             $ 13.15   $ 12.16 $ 12.63 $ 11.89
Weighted-Average Remaining Life (in years)                      
Outstanding at the end of the period             6 years 6 months 18 days   6 years 2 months 1 day 6 years 9 months 26 days  
Vested or unvested and expected to vest at the end of the period             6 years 6 months 7 days   6 years 1 month 24 days 6 years 9 months 4 days  
Exercisable at the end of the period             4 years 8 months 12 days   4 years 11 months 19 days 5 years 3 months 18 days  
Aggregate Intrinsic Value                      
Outstanding at the end of the period | $             $ 23,000   $ 13,513,000    
Vested or unvested and expected to vest at the end of the period | $             22,000   13,283,000    
Exercisable at the end of the period | $                 3,733,000    
Additional disclosure for options                      
Cash received for exercise of stock options | $                 650,000 $ 5,161,000 $ 4,429,000
Total fair value of options vested | $             17,121,000   10,964,000 15,298,000 16,145,000
Total intrinsic value of options exercised | $                 598,000 3,142,000 3,275,000
Stock options | Chief Executive Officer                      
Additional disclosure for options                      
Stock compensation cost due to modification | $             $ 0   $ 742,000 $ 3,100,000 $ 0
Restricted stock                      
Number of Restricted Stock                      
Unvested at the beginning of the period (in shares)             106,000 50,000 199,000 50,000  
Awarded (in shares)             118,000   2,253,000 75,000  
Vested (in shares)                 (25,000) (19,000)  
Forfeited (in shares)             (25,000)   (108,000)    
Unvested at the end of the period (in shares)             199,000   2,319,000 106,000 50,000
Weighted-Average Grant Date Fair Value                      
Unvested at the beginning of the period (in dollars per share) | $ / shares             $ 6.54 $ 9.23 $ 4.41 $ 9.23  
Awarded (in dollars per share) | $ / shares             3.15   2.71 5.65  
Vested (in dollars per share) | $ / shares                 5.87 10.13  
Forfeited (in dollars per share) | $ / shares             7.52   2.68    
Unvested at the end of the period (in dollars per share) | $ / shares             $ 4.41   $ 2.82 $ 6.54 $ 9.23
Restricted stock | Officers                      
Number of Restricted Stock                      
Awarded (in shares)     239,000 529,830   117,800          
Weighted-Average Grant Date Fair Value                      
Awarded (in dollars per share) | $ / shares     $ 4.71 $ 2.47   $ 3.15          
Deferred share units                      
Additional disclosure for options                      
Stock compensation expense (reduction) | $             $ 215,000   $ 206,000 $ 380,000 $ 389,000
Compensation Policy for Non-Employee Directors | Stock options                      
Number of Stock Options                      
Granted (in shares)             40,000   80,000 80,000 80,000
Compensation Policy for Non-Employee Directors | Deferred share units                      
Additional disclosure for options                      
Stock compensation expense (reduction) | $             $ 215,000   $ 206,000 $ 380,000 $ 389,000
2016 Plan                      
Computation of Net Loss per Common Share                      
Common stock equivalents under treasury stock method for options and unvested restricted stock (in shares)   14,250,000                  
Stock-Based Compensation                      
Number of employee share-based compensation plans | item                 1    
Additional shares authorized for issuance (in shares) 1,000,000                    
Common stock authorized for issuance (in shares)   5,500,000                  
2016 Plan | Stock options                      
Weighted-average assumptions used to estimate the fair value of each stock option                      
Number of group of awards for which expected term is calculated for and applied | item                 1    
Number of Stock Options                      
Exercised (in shares)                 (191,000)    
2016 Plan | Stock options | Maximum                      
Stock-Based Compensation                      
Vesting period                 4 years    
Exercise period                 10 years    
Workforce reduction | Stock options                      
Stock-Based Compensation                      
Vesting period         3 years            
Number of Stock Options                      
Granted (in shares)         847,000            
Forfeited/Canceled (in shares)             (762,000)        
Additional disclosure for options                      
Stock compensation expense (reduction) | $             $ (837,000)