Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001415889-15-002221-index-headers.html | 2015-06-29 17:29:54 | |
| 0001415889-15-002221-index.html | 2015-06-29 17:29:54 | |
| 0001415889-15-002221.txt | 2015-06-29 17:29:54 | |
 0001415889-15-002221-xbrl.zip | 187123 | 2015-06-29 17:29:54 |
 av101.jpg | 44581 | 2015-06-29 17:29:54 |
| ex31-1.htm | 9130 | 2015-06-29 17:29:54 |
| ex31-2.htm | 10130 | 2015-06-29 17:29:54 |
| ex32.htm | 5353 | 2015-06-29 17:29:54 |
| FilingSummary.xml | 41057 | 2015-06-29 17:29:54 |
| Financial_Report.xlsx | 102298 | 2015-06-29 17:29:54 |
 image_01n.jpg | 34199 | 2015-06-29 17:29:54 |
 image_02n.jpg | 29433 | 2015-06-29 17:29:54 |
 image_03.jpg | 24277 | 2015-06-29 17:29:54 |
 image_04.jpg | 23793 | 2015-06-29 17:29:54 |
 image_05.jpg | 23673 | 2015-06-29 17:29:54 |
 image_06.jpg | 23536 | 2015-06-29 17:29:54 |
| R1.htm | 28397 | 2015-06-29 17:29:54 |
| R10.htm | 31738 | 2015-06-29 17:29:54 |
| R11.htm | 11141 | 2015-06-29 17:29:54 |
| R12.htm | 15760 | 2015-06-29 17:29:54 |
| R13.htm | 10401 | 2015-06-29 17:29:54 |
| R14.htm | 201276 | 2015-06-29 17:29:54 |
| R15.htm | 128835 | 2015-06-29 17:29:54 |
| R16.htm | 7592 | 2015-06-29 17:29:54 |
| R17.htm | 25299 | 2015-06-29 17:29:54 |
| R18.htm | 10674 | 2015-06-29 17:29:54 |
| R19.htm | 76206 | 2015-06-29 17:29:54 |
| R2.htm | 82971 | 2015-06-29 17:29:54 |
| R20.htm | 11278 | 2015-06-29 17:29:54 |
| R21.htm | 29568 | 2015-06-29 17:29:54 |
| R22.htm | 18491 | 2015-06-29 17:29:54 |
| R23.htm | 98052 | 2015-06-29 17:29:54 |
| R24.htm | 119715 | 2015-06-29 17:29:54 |
| R25.htm | 41318 | 2015-06-29 17:29:54 |
| R26.htm | 24711 | 2015-06-29 17:29:54 |
| R27.htm | 11044 | 2015-06-29 17:29:54 |
| R28.htm | 13962 | 2015-06-29 17:29:54 |
| R29.htm | 9695 | 2015-06-29 17:29:54 |
| R3.htm | 37701 | 2015-06-29 17:29:54 |
| R30.htm | 145142 | 2015-06-29 17:29:54 |
| R31.htm | 84422 | 2015-06-29 17:29:54 |
| R32.htm | 22085 | 2015-06-29 17:29:54 |
| R33.htm | 66839 | 2015-06-29 17:29:54 |
| R34.htm | 29460 | 2015-06-29 17:29:54 |
| R35.htm | 96498 | 2015-06-29 17:29:54 |
| R36.htm | 58261 | 2015-06-29 17:29:54 |
| R37.htm | 35021 | 2015-06-29 17:29:54 |
| R38.htm | 22057 | 2015-06-29 17:29:54 |
| R39.htm | 11654 | 2015-06-29 17:29:54 |
| R4.htm | 44876 | 2015-06-29 17:29:54 |
| R40.htm | 9831 | 2015-06-29 17:29:54 |
| R41.htm | 14291 | 2015-06-29 17:29:54 |
| R42.htm | 18292 | 2015-06-29 17:29:54 |
| R43.htm | 14569 | 2015-06-29 17:29:54 |
| R44.htm | 36986 | 2015-06-29 17:29:54 |
| R45.htm | 69550 | 2015-06-29 17:29:54 |
| R46.htm | 26796 | 2015-06-29 17:29:54 |
| R47.htm | 36419 | 2015-06-29 17:29:54 |
| R48.htm | 40944 | 2015-06-29 17:29:54 |
| R49.htm | 23834 | 2015-06-29 17:29:54 |
| R5.htm | 84557 | 2015-06-29 17:29:54 |
| R50.htm | 27408 | 2015-06-29 17:29:54 |
| R51.htm | 6746 | 2015-06-29 17:29:54 |
| R52.htm | 12410 | 2015-06-29 17:29:54 |
| R53.htm | 15930 | 2015-06-29 17:29:54 |
| R54.htm | 10550 | 2015-06-29 17:29:54 |
| R55.htm | 20937 | 2015-06-29 17:29:54 |
| R56.htm | 14087 | 2015-06-29 17:29:54 |
| R57.htm | 15750 | 2015-06-29 17:29:54 |
| R58.htm | 33218 | 2015-06-29 17:29:54 |
| R59.htm | 18196 | 2015-06-29 17:29:54 |
| R6.htm | 49035 | 2015-06-29 17:29:54 |
| R60.htm | 20293 | 2015-06-29 17:29:54 |
| R61.htm | 31493 | 2015-06-29 17:29:54 |
| R62.htm | 13334 | 2015-06-29 17:29:54 |
| R63.htm | 18017 | 2015-06-29 17:29:54 |
| R64.htm | 11751 | 2015-06-29 17:29:54 |
| R65.htm | 16471 | 2015-06-29 17:29:54 |
| R66.htm | 4637 | 2015-06-29 17:29:54 |
| R67.htm | 46163 | 2015-06-29 17:29:54 |
| R68.htm | 55528 | 2015-06-29 17:29:54 |
| R69.htm | 6397 | 2015-06-29 17:29:54 |
| R7.htm | 10993 | 2015-06-29 17:29:54 |
| R8.htm | 18168 | 2015-06-29 17:29:54 |
| R9.htm | 64832 | 2015-06-29 17:29:54 |
| report.css | 2767 | 2015-06-29 17:29:54 |
| Show.js | 1410 | 2015-06-29 17:29:54 |
| vsta-20150331.xml | 1831036 | 2015-06-29 17:29:54 |
| vsta-20150331.xsd | 80289 | 2015-06-29 17:29:54 |
| vsta-20150331_cal.xml | 56374 | 2015-06-29 17:29:54 |
| vsta-20150331_def.xml | 183321 | 2015-06-29 17:29:54 |
| vsta-20150331_lab.xml | 392883 | 2015-06-29 17:29:54 |
| vsta-20150331_pre.xml | 333686 | 2015-06-29 17:29:54 |
| vsta10k_mar312015.htm | 3708736 | 2015-06-29 17:29:54 |