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Related Party Transactions - Additional Information (Details) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Nov. 30, 2019
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Jul. 01, 2017
Sep. 30, 2016
Sep. 10, 2016
Dec. 31, 2012
Related Party Transaction [Line Items]                
Long-term debt   $ 696,001,000   $ 636,812,000        
Total revenue from related parties   1,049,000 $ 813,000          
Interest paid   17,790,000 20,383,000          
Affiliated entity                
Related Party Transaction [Line Items]                
Long-term debt   85,822,000   55,771,000        
Softbank Corp. | Equity method investee                
Related Party Transaction [Line Items]                
Total revenue from related parties     800,000          
Accounts receivable   400,000 2,700,000          
Convertible promissory notes | Convertible Promissory Notes Interest Rate 6% Due December 2020, Recourse                
Related Party Transaction [Line Items]                
Long-term debt       $ 273,410,000        
Debt exchanged $ 6,900,000              
Convertible stock price (in dollars per share) $ 11.25              
Debt conversion, shares issued (in shares) 616,302              
Debt face amount             $ 260,000,000  
Interest rate percentage       6.00%        
Convertible promissory notes | Convertible Promissory Notes Interest Rate 6% Due December 2020, Recourse | Affiliated entity                
Related Party Transaction [Line Items]                
Long-term debt       $ 20,801,000        
Interest rate percentage         6.00% 5.00%    
Convertible debt | Convertible Promissory Notes Interest Rate 6% Due December 2020, Recourse                
Related Party Transaction [Line Items]                
Long-term debt   279,000,000            
Debt face amount   289,300,000            
Convertible debt | Additional Convertible Notes                
Related Party Transaction [Line Items]                
Debt face amount   30,000,000            
Term loan | 7.5% term loan due September 2028                
Related Party Transaction [Line Items]                
Long-term debt   $ 33,036,000   $ 34,969,000        
Interest rate percentage   7.50%   7.50%        
Term loan | 7.5% term loan due September 2028 | Affiliated entity                
Related Party Transaction [Line Items]                
Long-term debt   $ 33,036,000   $ 34,970,000        
PPA IIIa                
Related Party Transaction [Line Items]                
Debt repayment—principal   8,736,000   $ 6,631,000        
PPA IIIa | Term loan | 7.5% term loan due September 2028                
Related Party Transaction [Line Items]                
Debt face amount               $ 46,800,000
Interest rate percentage               7.50%
PPA IIIa | Term loan | 7.5% term loan due September 2028 | Affiliated entity                
Related Party Transaction [Line Items]                
Debt repayment—principal   2,100,000 800,000          
Interest paid   700,000 $ 800,000          
Service | Softbank Corp. | Equity method investee                
Related Party Transaction [Line Items]                
Total revenue from related parties   $ 1,000,000