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| 0001437749-19-009769-index.html | 2019-05-14 12:31:04 | |
| 0001437749-19-009769.txt | 2019-05-14 12:31:04 | |
 0001437749-19-009769-xbrl.zip | 84440 | 2019-05-14 12:31:04 |
| ex_143836.htm | 8772 | 2019-05-14 12:31:04 |
| ex_143837.htm | 9162 | 2019-05-14 12:31:04 |
| ex_143838.htm | 4044 | 2019-05-14 12:31:04 |
| ex_143839.htm | 4221 | 2019-05-14 12:31:04 |
| FilingSummary.xml | 16258 | 2019-05-14 12:31:04 |
| Financial_Report.xlsx | 31967 | 2019-05-14 12:31:04 |
| R1.htm | 29538 | 2019-05-14 12:31:04 |
| R10.htm | 128603 | 2019-05-14 12:31:04 |
| R11.htm | 7271 | 2019-05-14 12:31:04 |
| R12.htm | 6595 | 2019-05-14 12:31:04 |
| R13.htm | 54367 | 2019-05-14 12:31:04 |
| R14.htm | 254744 | 2019-05-14 12:31:04 |
| R15.htm | 119330 | 2019-05-14 12:31:04 |
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| R17.htm | 24608 | 2019-05-14 12:31:04 |
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| R19.htm | 29977 | 2019-05-14 12:31:04 |
| R2.htm | 72881 | 2019-05-14 12:31:04 |
| R20.htm | 39989 | 2019-05-14 12:31:04 |
| R21.htm | 44416 | 2019-05-14 12:31:04 |
| R22.htm | 20991 | 2019-05-14 12:31:04 |
| R23.htm | 7443 | 2019-05-14 12:31:04 |
| R3.htm | 14809 | 2019-05-14 12:31:04 |
| R4.htm | 51582 | 2019-05-14 12:31:04 |
| R5.htm | 29630 | 2019-05-14 12:31:04 |
| R6.htm | 3904 | 2019-05-14 12:31:04 |
| R7.htm | 77887 | 2019-05-14 12:31:04 |
| R8.htm | 45633 | 2019-05-14 12:31:04 |
| R9.htm | 258987 | 2019-05-14 12:31:04 |
| report.css | 2767 | 2019-05-14 12:31:04 |
| Show.js | 1085 | 2019-05-14 12:31:04 |
| usac-20190331.xml | 1181475 | 2019-05-14 12:31:04 |
| usac-20190331.xsd | 24286 | 2019-05-14 12:31:04 |
| usac-20190331_cal.xml | 35400 | 2019-05-14 12:31:04 |
| usac-20190331_def.xml | 179264 | 2019-05-14 12:31:04 |
| usac-20190331_lab.xml | 169799 | 2019-05-14 12:31:04 |
| usac-20190331_pre.xml | 193509 | 2019-05-14 12:31:04 |
| usac20190331_10q.htm | 869013 | 2019-05-14 12:31:04 |