XML 30 R35.htm IDEA: XBRL DOCUMENT v3.19.3
Prepaid Expenses and Other Current Assets - Summary of Prepaids and Other Current Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Prepaid Expense And Other Assets Current [Abstract]    
Prepaid inventory $ 2,329 $ 2,284
Restricted cash 307 550
Prepaid insurance 2,904 434
Deferred offering costs   1,218
Other 1,196 932
Prepaid and other current assets $ 6,736 $ 5,418