Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Details 2)

v3.19.1
Summary of Significant Accounting Policies (Details 2) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Assets:    
Prepaid expenses and other current assets $ 1,036 $ 272
Liabilities:    
Deferred revenue short-term 2,904 2,629
Deferred revenue long-term 4,447 5,622
Stockholders' deficit:    
Accumulated deficit $ (114,227) (111,820)
As Previously Reported [Member]    
Assets:    
Prepaid expenses and other current assets   272
Liabilities:    
Deferred revenue short-term   2,629
Deferred revenue long-term   5,622
Stockholders' deficit:    
Accumulated deficit   (111,820)
Adjustments [Member]    
Assets:    
Prepaid expenses and other current assets   369
Liabilities:    
Deferred revenue short-term   (465)
Deferred revenue long-term   (253)
Stockholders' deficit:    
Accumulated deficit   1,087
As Adjusted [Member]    
Assets:    
Prepaid expenses and other current assets   641
Liabilities:    
Deferred revenue short-term   2,164
Deferred revenue long-term   5,369
Stockholders' deficit:    
Accumulated deficit   $ (110,733)