XML 76 R62.htm IDEA: XBRL DOCUMENT v3.10.0.1
Equipment Lease Obligations - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Capital Leased Assets [Line Items]          
Remaining minimum lease payment due within one year $ 8   $ 8    
Equipment          
Capital Leased Assets [Line Items]          
Assets under equipment leases, gross 50   50   $ 50
Leased assets, depreciation expense $ 3 $ 73 $ 113 $ 219