X0306 4/A 2019-06-30 2019-07-02 false 0000902791 BARRETT BUSINESS SERVICES INC BBSI 0001257912 VAUGHN GREGORY R 8100 NE PARKWAY DRIVE, SUITE 200 VANCOUVER WA 98662 false true false false VP & COO-Corporate Operations Common Stock 2019-03-18 5 G false E 6000.00 0.00 D 73721.00 D Common Stock 2019-06-30 4 M false 2500.00 0.00 A 76221.00 D Common Stock 2019-06-30 4 M false 7500.00 0.00 A 83721.00 D Common Stock 2019-06-30 4 M false 6382.00 0.00 A 90103.00 D Common Stock 2019-06-30 4 M false 5048.00 0.00 A 95151.00 D Common Stock 2019-06-30 4 M false 776.00 0.00 A 95927.00 D Common Stock 2019-06-30 4 M false 401.00 0.00 A 96328.00 D Common Stock 2019-06-30 4 M false 1.00 0.00 A 96329.00 D Common Stock 2019-07-01 4 F false 984.00 80.69 D 95345.00 D Common Stock 2019-07-01 4 F false 2952.00 80.69 D 92393.00 D Common Stock 2019-07-01 4 F false 2512.00 80.69 D 89881.00 D Common Stock 2019-07-01 4 F false 1987.00 80.69 D 87894.00 D Common Stock 2019-07-01 4 F false 306.00 80.69 D 87588.00 D Common Stock 2019-07-01 4 F false 158.00 80.69 D 87430.00 D Common Stock 2019-07-01 4 F false 1.00 80.69 D 87429.00 D Balance was incorrectly reported on the reporting person's form 4 filed on July 2, 2019. These balances have been updated. /s/ Anthony Harris, as attorney-in-fact 2019-07-16