Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001654954-22-002804-index-headers.html | 2022-03-09 16:24:32 | |
| 0001654954-22-002804-index.html | 2022-03-09 16:24:32 | |
| 0001654954-22-002804.txt | 2022-03-09 16:24:32 | |
 0001654954-22-002804-xbrl.zip | 142732 | 2022-03-09 16:24:32 |
| FilingSummary.xml | 29477 | 2022-03-09 16:24:32 |
| Financial_Report.xlsx | 64977 | 2022-03-09 16:24:32 |
| isig-20211231.xsd | 39230 | 2022-03-09 16:24:32 |
| isig-20211231_cal.xml | 50982 | 2022-03-09 16:24:32 |
| isig-20211231_def.xml | 115829 | 2022-03-09 16:24:32 |
| isig-20211231_lab.xml | 332139 | 2022-03-09 16:24:32 |
| isig-20211231_pre.xml | 260623 | 2022-03-09 16:24:32 |
| isig_10k.htm | 964728 | 2022-03-09 16:24:32 |
| isig_10k_htm.xml | 828974 | 2022-03-09 16:24:32 |
| isig_ex231.htm | 4987 | 2022-03-09 16:24:32 |
| isig_ex311.htm | 11351 | 2022-03-09 16:24:32 |
| isig_ex312.htm | 9184 | 2022-03-09 16:24:32 |
| isig_ex32.htm | 5266 | 2022-03-09 16:24:32 |
| MetaLinks.json | 496318 | 2022-03-09 16:24:32 |
| R1.htm | 64995 | 2022-03-09 16:24:32 |
| R10.htm | 9961 | 2022-03-09 16:24:32 |
| R11.htm | 89099 | 2022-03-09 16:24:32 |
| R12.htm | 53373 | 2022-03-09 16:24:32 |
| R13.htm | 8799 | 2022-03-09 16:24:32 |
| R14.htm | 6065 | 2022-03-09 16:24:32 |
| R15.htm | 10419 | 2022-03-09 16:24:32 |
| R16.htm | 91362 | 2022-03-09 16:24:32 |
| R17.htm | 37664 | 2022-03-09 16:24:32 |
| R18.htm | 25214 | 2022-03-09 16:24:32 |
| R19.htm | 15844 | 2022-03-09 16:24:32 |
| R2.htm | 110835 | 2022-03-09 16:24:32 |
| R20.htm | 43328 | 2022-03-09 16:24:32 |
| R21.htm | 86812 | 2022-03-09 16:24:32 |
| R22.htm | 53236 | 2022-03-09 16:24:32 |
| R23.htm | 10980 | 2022-03-09 16:24:32 |
| R24.htm | 14345 | 2022-03-09 16:24:32 |
| R25.htm | 12097 | 2022-03-09 16:24:32 |
| R26.htm | 13614 | 2022-03-09 16:24:32 |
| R27.htm | 10362 | 2022-03-09 16:24:32 |
| R28.htm | 65730 | 2022-03-09 16:24:32 |
| R29.htm | 19226 | 2022-03-09 16:24:32 |
| R3.htm | 100745 | 2022-03-09 16:24:32 |
| R30.htm | 7522 | 2022-03-09 16:24:32 |
| R31.htm | 12953 | 2022-03-09 16:24:32 |
| R32.htm | 17928 | 2022-03-09 16:24:32 |
| R33.htm | 10276 | 2022-03-09 16:24:32 |
| R34.htm | 20180 | 2022-03-09 16:24:32 |
| R35.htm | 14365 | 2022-03-09 16:24:32 |
| R36.htm | 14412 | 2022-03-09 16:24:32 |
| R37.htm | 5617 | 2022-03-09 16:24:32 |
| R38.htm | 10260 | 2022-03-09 16:24:32 |
| R39.htm | 11763 | 2022-03-09 16:24:32 |
| R4.htm | 44454 | 2022-03-09 16:24:32 |
| R40.htm | 36817 | 2022-03-09 16:24:32 |
| R41.htm | 24446 | 2022-03-09 16:24:32 |
| R42.htm | 21754 | 2022-03-09 16:24:32 |
| R43.htm | 26738 | 2022-03-09 16:24:32 |
| R44.htm | 11566 | 2022-03-09 16:24:32 |
| R45.htm | 21311 | 2022-03-09 16:24:32 |
| R46.htm | 30348 | 2022-03-09 16:24:32 |
| R47.htm | 6756 | 2022-03-09 16:24:32 |
| R48.htm | 12915 | 2022-03-09 16:24:32 |
| R49.htm | 6039 | 2022-03-09 16:24:32 |
| R5.htm | 95887 | 2022-03-09 16:24:32 |
| R50.htm | 10494 | 2022-03-09 16:24:32 |
| R51.htm | 15669 | 2022-03-09 16:24:32 |
| R6.htm | 54285 | 2022-03-09 16:24:32 |
| R7.htm | 38311 | 2022-03-09 16:24:32 |
| R8.htm | 17893 | 2022-03-09 16:24:32 |
| R9.htm | 46276 | 2022-03-09 16:24:32 |
| report.css | 2767 | 2022-03-09 16:24:32 |
| Show.js | 1085 | 2022-03-09 16:24:32 |