Quarterly report pursuant to Section 13 or 15(d)

Commitments - Schedule of Rent Expense (Detail)

v3.19.3
Commitments - Schedule of Rent Expense (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Commitments And Contingencies Disclosure [Abstract]        
Operating lease $ 94 $ 94 $ 283 $ 283
Short-term leases 14 12 51 16
Total $ 108 $ 106 $ 334 $ 299