Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Details)

v3.7.0.1
Stock-Based Compensation (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Stock Based Compensation    
Allocated Share-based Compensation Expense $ 1,448 $ 1,622
Fair value assumptions    
Dividend rate 0.00%  
Options    
Unrecognized compensation cost options $ 14,000  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 2 years  
Common Stock, Capital Shares Reserved for Future Issuance 2,800,000  
2014 Plan | Awards | Series A common stock    
Options    
Outstanding beginning balance (in shares) 454,000  
Exercised (in shares) (35,000)  
Outstanding ending balance (in shares) 419,000  
Number of awards exercisable (in shares) 415,000  
WAEP Outstanding beginning balance (in dollars per share) $ 32.47  
WAEP options exercised (in dollars per share) 25.51  
WAEP Outstanding ending balance (in dollars per share) 33.05  
WAEP options exercisable (in dollars per share) $ 32.95  
Weighted average remaining contractual life outstanding 2 years 8 months 12 days  
Weighted average remaining contractual life exercisable 2 years 8 months 12 days  
Aggregate intrinsic value outstanding $ 22,000  
Aggregate intrinsic value exercisable $ 22,000  
2014 Plan | Awards | Series C common stock    
Options    
Outstanding beginning balance (in shares) 2,467,000  
Exercised (in shares) (69,000)  
Outstanding ending balance (in shares) 2,398,000  
Number of awards exercisable (in shares) 872,000  
WAEP Outstanding beginning balance (in dollars per share) $ 42.45  
WAEP options exercised (in dollars per share) 26.24  
WAEP Outstanding ending balance (in dollars per share) 42.92  
WAEP options exercisable (in dollars per share) $ 33.45  
Weighted average remaining contractual life outstanding 5 years 10 months 24 days  
Weighted average remaining contractual life exercisable 2 years 9 months 18 days  
Aggregate intrinsic value outstanding $ 104,000  
Aggregate intrinsic value exercisable $ 46,000  
2014 Plan | Options    
Options    
Options granted (in shares) 0  
Operating expense    
Stock Based Compensation    
Allocated Share-based Compensation Expense $ 1 2
Selling, general and administrative    
Stock Based Compensation    
Allocated Share-based Compensation Expense 1,220 1,546
Research and development    
Stock Based Compensation    
Allocated Share-based Compensation Expense $ 227 $ 74
Skyhook | LTIPs | PARs    
Options    
Grants (in shares) 0  
Skyhook | LTIPs | PARs and PSUs    
Options    
Fair value of outstanding grants $ 2,500  
Other Current Liabilities | LTIPs | Level 3    
Options    
Fair value of outstanding grants $ 1,600