Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition - Narrative (Details)

v3.8.0.1
Revenue Recognition - Narrative (Details)
3 Months Ended
Mar. 31, 2018
USD ($)
product_line
Mar. 31, 2017
USD ($)
Dec. 31, 2017
USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Professional and other $ 8,001,000 $ 6,706,000  
Cumulative effect of adoption of ASU 2014-09     $ 2,221,000
On demand $ 63,800,000    
Number of product lines | product_line 4    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year    
Deferred commissions period of benefit 3 years    
Current capitalized commissions cost $ 3,600,000    
Noncurrent capitalized commissions cost 5,400,000    
Amortized commission costs 800,000    
Capitalized commissions impairment loss $ 0    
Remaining performance obligation percentage 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    
Minimum      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 2 years    
Maximum      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 7 years    
Professional Service      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Remaining performance obligation $ 0    
Professional Service | Maximum      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year    
On demand      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year    
Remaining performance obligation $ 354,000,000    
On demand | Minimum      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year