Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000909832-17-000014-index-headers.html | 2017-10-17 21:17:47 | |
| 0000909832-17-000014-index.html | 2017-10-17 21:17:47 | |
| 0000909832-17-000014.txt | 2017-10-17 21:17:47 | |
 0000909832-17-000014-xbrl.zip | 236522 | 2017-10-17 21:17:47 |
| cost-20170903.xml | 1975401 | 2017-10-17 21:17:47 |
| cost-20170903.xsd | 44437 | 2017-10-17 21:17:47 |
| cost-20170903_cal.xml | 112595 | 2017-10-17 21:17:47 |
| cost-20170903_def.xml | 191815 | 2017-10-17 21:17:47 |
| cost-20170903_lab.xml | 725770 | 2017-10-17 21:17:47 |
| cost-20170903_pre.xml | 429484 | 2017-10-17 21:17:47 |
| cost10k90317.htm | 1954659 | 2017-10-17 21:17:47 |
| costex21110k90317.htm | 17343 | 2017-10-17 21:17:47 |
| costex23110k90317.htm | 4104 | 2017-10-17 21:17:47 |
| costex31110k90317.htm | 23872 | 2017-10-17 21:17:47 |
| costex32110k90317.htm | 12515 | 2017-10-17 21:17:47 |
| FilingSummary.xml | 36955 | 2017-10-17 21:17:47 |
| Financial_Report.xlsx | 96383 | 2017-10-17 21:17:47 |
| R1.htm | 29997 | 2017-10-17 21:17:47 |
| R10.htm | 64752 | 2017-10-17 21:17:47 |
| R11.htm | 35515 | 2017-10-17 21:17:47 |
| R12.htm | 61172 | 2017-10-17 21:17:47 |
| R13.htm | 29363 | 2017-10-17 21:17:47 |
| R14.htm | 17586 | 2017-10-17 21:17:47 |
| R15.htm | 38262 | 2017-10-17 21:17:47 |
| R16.htm | 118166 | 2017-10-17 21:17:47 |
| R17.htm | 19569 | 2017-10-17 21:17:47 |
| R18.htm | 14904 | 2017-10-17 21:17:47 |
| R19.htm | 86250 | 2017-10-17 21:17:47 |
| R2.htm | 95486 | 2017-10-17 21:17:47 |
| R20.htm | 198079 | 2017-10-17 21:17:47 |
| R21.htm | 134039 | 2017-10-17 21:17:47 |
| R22.htm | 14543 | 2017-10-17 21:17:47 |
| R23.htm | 62183 | 2017-10-17 21:17:47 |
| R24.htm | 31875 | 2017-10-17 21:17:47 |
| R25.htm | 56946 | 2017-10-17 21:17:47 |
| R26.htm | 26551 | 2017-10-17 21:17:47 |
| R27.htm | 14462 | 2017-10-17 21:17:47 |
| R28.htm | 30816 | 2017-10-17 21:17:47 |
| R29.htm | 117411 | 2017-10-17 21:17:47 |
| R3.htm | 19002 | 2017-10-17 21:17:47 |
| R30.htm | 19976 | 2017-10-17 21:17:47 |
| R31.htm | 88745 | 2017-10-17 21:17:47 |
| R32.htm | 198170 | 2017-10-17 21:17:47 |
| R33.htm | 81602 | 2017-10-17 21:17:47 |
| R34.htm | 14217 | 2017-10-17 21:17:47 |
| R35.htm | 37683 | 2017-10-17 21:17:47 |
| R36.htm | 4949 | 2017-10-17 21:17:47 |
| R37.htm | 37743 | 2017-10-17 21:17:47 |
| R38.htm | 28416 | 2017-10-17 21:17:47 |
| R39.htm | 45548 | 2017-10-17 21:17:47 |
| R4.htm | 65389 | 2017-10-17 21:17:47 |
| R40.htm | 18536 | 2017-10-17 21:17:47 |
| R41.htm | 19868 | 2017-10-17 21:17:47 |
| R42.htm | 64384 | 2017-10-17 21:17:47 |
| R43.htm | 46323 | 2017-10-17 21:17:47 |
| R44.htm | 10738 | 2017-10-17 21:17:47 |
| R45.htm | 21097 | 2017-10-17 21:17:47 |
| R46.htm | 10591 | 2017-10-17 21:17:47 |
| R47.htm | 55155 | 2017-10-17 21:17:47 |
| R48.htm | 26582 | 2017-10-17 21:17:47 |
| R49.htm | 9077 | 2017-10-17 21:17:47 |
| R5.htm | 15883 | 2017-10-17 21:17:47 |
| R50.htm | 27295 | 2017-10-17 21:17:47 |
| R51.htm | 11880 | 2017-10-17 21:17:47 |
| R52.htm | 35918 | 2017-10-17 21:17:47 |
| R53.htm | 40851 | 2017-10-17 21:17:47 |
| R54.htm | 20611 | 2017-10-17 21:17:47 |
| R55.htm | 15620 | 2017-10-17 21:17:47 |
| R56.htm | 17547 | 2017-10-17 21:17:47 |
| R57.htm | 9235 | 2017-10-17 21:17:47 |
| R58.htm | 40261 | 2017-10-17 21:17:47 |
| R59.htm | 16520 | 2017-10-17 21:17:47 |
| R6.htm | 68462 | 2017-10-17 21:17:47 |
| R60.htm | 73116 | 2017-10-17 21:17:47 |
| R7.htm | 85530 | 2017-10-17 21:17:47 |
| R8.htm | 4514 | 2017-10-17 21:17:47 |
| R9.htm | 71692 | 2017-10-17 21:17:47 |
| report.css | 2767 | 2017-10-17 21:17:47 |
| Show.js | 1410 | 2017-10-17 21:17:47 |