Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001558370-18-008533-index-headers.html | 2018-11-05 19:34:00 | |
| 0001558370-18-008533-index.html | 2018-11-05 19:34:00 | |
| 0001558370-18-008533.txt | 2018-11-05 19:34:00 | |
 0001558370-18-008533-xbrl.zip | 208397 | 2018-11-05 19:34:00 |
| FilingSummary.xml | 40723 | 2018-11-05 19:34:00 |
| Financial_Report.xlsx | 100056 | 2018-11-05 19:34:00 |
| prim-20180930.xml | 2804450 | 2018-11-05 19:34:00 |
| prim-20180930.xsd | 67416 | 2018-11-05 19:34:00 |
| prim-20180930ex311b93886.htm | 19526 | 2018-11-05 19:34:00 |
| prim-20180930ex312736835.htm | 19682 | 2018-11-05 19:34:00 |
| prim-20180930ex3158aac82.htm | 32293 | 2018-11-05 19:34:00 |
| prim-20180930ex321a0d182.htm | 7814 | 2018-11-05 19:34:00 |
| prim-20180930ex32227618d.htm | 7861 | 2018-11-05 19:34:00 |
| prim-20180930x10q.htm | 2713498 | 2018-11-05 19:34:00 |
| prim-20180930_cal.xml | 74743 | 2018-11-05 19:34:00 |
| prim-20180930_def.xml | 265759 | 2018-11-05 19:34:00 |
| prim-20180930_lab.xml | 615882 | 2018-11-05 19:34:00 |
| prim-20180930_pre.xml | 467391 | 2018-11-05 19:34:00 |
| R1.htm | 25908 | 2018-11-05 19:34:00 |
| R10.htm | 212043 | 2018-11-05 19:34:00 |
| R11.htm | 97625 | 2018-11-05 19:34:00 |
| R12.htm | 138669 | 2018-11-05 19:34:00 |
| R13.htm | 104998 | 2018-11-05 19:34:00 |
| R14.htm | 26248 | 2018-11-05 19:34:00 |
| R15.htm | 57737 | 2018-11-05 19:34:00 |
| R16.htm | 54825 | 2018-11-05 19:34:00 |
| R17.htm | 142094 | 2018-11-05 19:34:00 |
| R18.htm | 6189 | 2018-11-05 19:34:00 |
| R19.htm | 16718 | 2018-11-05 19:34:00 |
| R2.htm | 76669 | 2018-11-05 19:34:00 |
| R20.htm | 10161 | 2018-11-05 19:34:00 |
| R21.htm | 103056 | 2018-11-05 19:34:00 |
| R22.htm | 9823 | 2018-11-05 19:34:00 |
| R23.htm | 15563 | 2018-11-05 19:34:00 |
| R24.htm | 203468 | 2018-11-05 19:34:00 |
| R25.htm | 5647 | 2018-11-05 19:34:00 |
| R26.htm | 38507 | 2018-11-05 19:34:00 |
| R27.htm | 195384 | 2018-11-05 19:34:00 |
| R28.htm | 93539 | 2018-11-05 19:34:00 |
| R29.htm | 122198 | 2018-11-05 19:34:00 |
| R3.htm | 17708 | 2018-11-05 19:34:00 |
| R30.htm | 108548 | 2018-11-05 19:34:00 |
| R31.htm | 24259 | 2018-11-05 19:34:00 |
| R32.htm | 44376 | 2018-11-05 19:34:00 |
| R33.htm | 53057 | 2018-11-05 19:34:00 |
| R34.htm | 140700 | 2018-11-05 19:34:00 |
| R35.htm | 12594 | 2018-11-05 19:34:00 |
| R36.htm | 103911 | 2018-11-05 19:34:00 |
| R37.htm | 195749 | 2018-11-05 19:34:00 |
| R38.htm | 35807 | 2018-11-05 19:34:00 |
| R39.htm | 48965 | 2018-11-05 19:34:00 |
| R4.htm | 66662 | 2018-11-05 19:34:00 |
| R40.htm | 10782 | 2018-11-05 19:34:00 |
| R41.htm | 12539 | 2018-11-05 19:34:00 |
| R42.htm | 6402 | 2018-11-05 19:34:00 |
| R43.htm | 13159 | 2018-11-05 19:34:00 |
| R44.htm | 13064 | 2018-11-05 19:34:00 |
| R45.htm | 50815 | 2018-11-05 19:34:00 |
| R46.htm | 18055 | 2018-11-05 19:34:00 |
| R47.htm | 37128 | 2018-11-05 19:34:00 |
| R48.htm | 99464 | 2018-11-05 19:34:00 |
| R49.htm | 68522 | 2018-11-05 19:34:00 |
| R5.htm | 20439 | 2018-11-05 19:34:00 |
| R50.htm | 23831 | 2018-11-05 19:34:00 |
| R51.htm | 18122 | 2018-11-05 19:34:00 |
| R52.htm | 43724 | 2018-11-05 19:34:00 |
| R53.htm | 19955 | 2018-11-05 19:34:00 |
| R54.htm | 22743 | 2018-11-05 19:34:00 |
| R55.htm | 133673 | 2018-11-05 19:34:00 |
| R56.htm | 14994 | 2018-11-05 19:34:00 |
| R57.htm | 12306 | 2018-11-05 19:34:00 |
| R58.htm | 55504 | 2018-11-05 19:34:00 |
| R59.htm | 17801 | 2018-11-05 19:34:00 |
| R6.htm | 110613 | 2018-11-05 19:34:00 |
| R60.htm | 30260 | 2018-11-05 19:34:00 |
| R61.htm | 16066 | 2018-11-05 19:34:00 |
| R62.htm | 35814 | 2018-11-05 19:34:00 |
| R63.htm | 37234 | 2018-11-05 19:34:00 |
| R64.htm | 7350 | 2018-11-05 19:34:00 |
| R65.htm | 55665 | 2018-11-05 19:34:00 |
| R66.htm | 30596 | 2018-11-05 19:34:00 |
| R67.htm | 10890 | 2018-11-05 19:34:00 |
| R68.htm | 25348 | 2018-11-05 19:34:00 |
| R7.htm | 12684 | 2018-11-05 19:34:00 |
| R8.htm | 14183 | 2018-11-05 19:34:00 |
| R9.htm | 18452 | 2018-11-05 19:34:00 |
| report.css | 2767 | 2018-11-05 19:34:00 |
| Show.js | 1085 | 2018-11-05 19:34:00 |