Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Notes) (Details)

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Summary of Significant Accounting Policies (Notes) (Details)
1 Months Ended 12 Months Ended
Dec. 31, 2018
USD ($)
Mar. 31, 2018
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
May 25, 2018
USD ($)
Dec. 31, 2016
Dec. 15, 2014
USD ($)
Feb. 01, 2014
Non-controlling Interest                  
Allowance for doubtful accounts receivable, current $ 826,000   $ 1,093,000 $ 826,000          
Impairments of internally developed software     $ 0 0 $ 0        
Number of reporting units     2            
Goodwill impairment charges     $ 0 0 0        
Intangible asset impairment charges     0 0 0        
Convertible Notes                  
Interest rate               1.75%  
Face amount               $ 172,500,000  
Ownership interest   43.00%              
Net loss attributable to noncontrolling interest     (420,000) (1,745,000) 0        
Convertible Notes Due 2019                  
Convertible Notes                  
Face amount and over allotments               $ 172,500,000  
Interest rate               1.75%  
Face amount 172,500,000   0 172,500,000          
Convertible Notes Due 2023                  
Convertible Notes                  
Interest rate           1.75%      
Face amount 345,000,000   345,000,000 345,000,000   $ 345,000,000      
ERS                  
Convertible Notes                  
Ownership interest                 64.50%
Net loss attributable to noncontrolling interest     $ 0 $ 0 $ 0        
Private Company                  
Convertible Notes                  
Investment in private companies   $ 1,333,000              
Klein | ERS                  
Convertible Notes                  
Ownership interest             81.50%    
ERS                  
Convertible Notes                  
Cash consideration $ 6,560,000                
Percentage of interests acquired     100.00%