Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition - Narrative (Details)

v3.10.0.1
Revenue Recognition - Narrative (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2018
USD ($)
product_line
Jun. 30, 2018
USD ($)
product_line
Jan. 01, 2018
USD ($)
Dec. 31, 2017
USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Cumulative effect of adoption of ASU 2014-09       $ 2,221,000
Number of product lines | product_line 4 4    
Contract term 1 year 1 year    
On demand   $ 86,700,000    
Deferred commissions period of benefit 3 years 3 years    
Current capitalized commissions cost $ 4,700,000 $ 4,700,000    
Noncurrent capitalized commissions cost 6,600,000 6,600,000    
Amortized commission costs 1,000,000 $ 1,800,000    
Capitalized commissions impairment loss $ 0      
Remaining performance obligation percentage 75.00% 75.00%    
Period for satisfying 75% of remaining obligation   24 months    
Accumulated Deficit        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Cumulative effect of adoption of ASU 2014-09       2,221,000
Accumulated Deficit | Adjustments due to ASU 2014-09        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Cumulative effect of adoption of ASU 2014-09       $ 2,200,000
Revenue from Contract with Customer | Adjustments due to ASU 2014-09        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Cumulative effect of adoption of ASU 2014-09 $ 0 $ 0    
Minimum        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Contract term 2 years 2 years    
Maximum        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Contract term 7 years 7 years    
Professional Service        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Remaining performance obligation $ 0 $ 0    
Professional Service | Maximum        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Contract term 1 year 1 year    
On demand        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Contract term 1 year 1 year    
Remaining performance obligation $ 365,300,000 $ 365,300,000    
On demand | Minimum        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Contract term 1 year 1 year    
Effect of Change on Net Income Higher/(Lower) | Accumulated Deficit | Adjustments due to ASU 2014-09        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Cumulative effect of adoption of ASU 2014-09     $ 800,000