Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Condensed Financial Statements (Details)

v3.19.1
Summary of Significant Accounting Policies - Condensed Financial Statements (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Jan. 01, 2019
Dec. 31, 2018
Dec. 31, 2017
Condensed Consolidated Balance Sheet Data (in thousands):          
Prepaid expenses and other current assets $ 6,379   $ 5,290 $ 4,574  
Other non-current assets 1,869   2,030 910  
Total Assets 131,048   143,177 141,341  
Deferred revenues, current portion 28,181     35,612  
Deferred revenue, net of current portion 59,734   56,780 53,303  
Total Liabilities 100,886   104,883 101,406  
Accumulated deficit (159,055)   (148,707) (147,066)  
Total stockholders' equity 30,162 $ 50,693 38,294 39,935 $ 11,522
Total liabilities and stockholders' equity 131,048   143,177 $ 141,341  
Condensed Consolidated Statement of Operations Data (in thousands):          
Revenue 8,545 4,152      
General and administrative expenses 4,932 4,352      
Loss from operations (10,683) (8,136)      
Loss before income taxes (10,348) (8,714)      
Net loss (10,348) (8,714)      
Comprehensive loss (9,422) $ (9,992)      
Adjusted Balance, ASC 605          
Condensed Consolidated Balance Sheet Data (in thousands):          
Prepaid expenses and other current assets 5,736        
Other non-current assets 749        
Total Assets 129,285        
Deferred revenues, current portion 37,612        
Deferred revenue, net of current portion 46,295        
Total Liabilities 96,878        
Accumulated deficit (156,810)        
Total stockholders' equity 32,407        
Total liabilities and stockholders' equity 129,285        
Condensed Consolidated Statement of Operations Data (in thousands):          
Revenue 9,222        
General and administrative expenses 4,859        
Loss from operations (10,079)        
Loss before income taxes (9,744)        
Net loss (9,744)        
Comprehensive loss (8,818)        
Accounting Standards Update 2014-09          
Condensed Consolidated Balance Sheet Data (in thousands):          
Prepaid expenses and other current assets     716    
Other non-current assets     1,120    
Total Assets     1,836    
Deferred revenue, net of current portion     3,477    
Total Liabilities     3,477    
Accumulated deficit     (1,641)    
Total stockholders' equity     (1,641)    
Total liabilities and stockholders' equity     $ 1,836    
Accounting Standards Update 2014-09 | Adjustments          
Condensed Consolidated Balance Sheet Data (in thousands):          
Prepaid expenses and other current assets (643)        
Other non-current assets (1,120)        
Total Assets (1,763)        
Deferred revenues, current portion 9,431        
Deferred revenue, net of current portion (13,439)        
Total Liabilities (4,008)        
Accumulated deficit 2,245        
Total stockholders' equity 2,245        
Total liabilities and stockholders' equity (1,763)        
Condensed Consolidated Statement of Operations Data (in thousands):          
Revenue 677        
General and administrative expenses (73)        
Loss from operations 604        
Loss before income taxes 604        
Net loss 604        
Comprehensive loss $ 604