Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Consolidated Balance Sheet Data (Details)

v3.19.3
Summary of Significant Accounting Policies - Consolidated Balance Sheet Data (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Jun. 30, 2019
Jan. 01, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Dec. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]              
Prepaid expenses and other current assets $ 4,778   $ 5,290 $ 4,574      
Other non-current assets 7,770   2,030 910      
Total Assets 116,751   143,177 141,341      
Deferred revenue, net of current portion 44,179   56,780 53,303      
Total Liabilities 96,109   104,883 101,406      
Accumulated deficit (173,405)   (148,707) (147,066)      
Total stockholders' equity 20,642 $ 19,485 38,294 39,935 $ 50,261 $ 55,315 $ 11,522
Total liabilities and stockholders' equity $ 116,751   143,177 $ 141,341      
Accounting Standards Update 2014-09              
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]              
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