Quarterly report pursuant to Section 13 or 15(d)

Commitments - Schedule of Rent Expense (Detail)

v3.19.2
Commitments - Schedule of Rent Expense (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Commitments And Contingencies Disclosure [Abstract]        
Operating lease $ 94 $ 94 $ 189 $ 189
Short-term leases 19 4 36 4
Total $ 113 $ 98 $ 225 $ 193