Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001564590-20-049605-index-headers.html | 2020-11-02 15:41:13 | |
| 0001564590-20-049605-index.html | 2020-11-02 15:41:13 | |
| 0001564590-20-049605.txt | 2020-11-02 15:41:13 | |
 0001564590-20-049605-xbrl.zip | 204096 | 2020-11-02 15:41:13 |
| ctg-10q_20200925.htm | 2813783 | 2020-11-02 15:41:13 |
| ctg-10q_20200925_htm.xml | 2309922 | 2020-11-02 15:41:13 |
| ctg-20200925.xsd | 68662 | 2020-11-02 15:41:13 |
| ctg-20200925_cal.xml | 80899 | 2020-11-02 15:41:13 |
| ctg-20200925_def.xml | 205312 | 2020-11-02 15:41:13 |
| ctg-20200925_lab.xml | 513230 | 2020-11-02 15:41:13 |
| ctg-20200925_pre.xml | 401941 | 2020-11-02 15:41:13 |
| ctg-ex31a_7.htm | 15472 | 2020-11-02 15:41:13 |
| ctg-ex31b_8.htm | 15671 | 2020-11-02 15:41:13 |
| ctg-ex32_6.htm | 9233 | 2020-11-02 15:41:13 |
| FilingSummary.xml | 46107 | 2020-11-02 15:41:13 |
| Financial_Report.xlsx | 103793 | 2020-11-02 15:41:13 |
| MetaLinks.json | 717663 | 2020-11-02 15:41:13 |
| R1.htm | 52248 | 2020-11-02 15:41:13 |
| R10.htm | 364012 | 2020-11-02 15:41:13 |
| R11.htm | 109068 | 2020-11-02 15:41:13 |
| R12.htm | 64692 | 2020-11-02 15:41:13 |
| R13.htm | 72880 | 2020-11-02 15:41:13 |
| R14.htm | 9107 | 2020-11-02 15:41:13 |
| R15.htm | 50765 | 2020-11-02 15:41:13 |
| R16.htm | 12121 | 2020-11-02 15:41:13 |
| R17.htm | 88422 | 2020-11-02 15:41:13 |
| R18.htm | 10235 | 2020-11-02 15:41:13 |
| R19.htm | 6974 | 2020-11-02 15:41:13 |
| R2.htm | 65144 | 2020-11-02 15:41:13 |
| R20.htm | 8641 | 2020-11-02 15:41:13 |
| R21.htm | 397983 | 2020-11-02 15:41:13 |
| R22.htm | 343919 | 2020-11-02 15:41:13 |
| R23.htm | 105908 | 2020-11-02 15:41:13 |
| R24.htm | 62533 | 2020-11-02 15:41:13 |
| R25.htm | 72881 | 2020-11-02 15:41:13 |
| R26.htm | 50859 | 2020-11-02 15:41:13 |
| R27.htm | 75360 | 2020-11-02 15:41:13 |
| R28.htm | 4461 | 2020-11-02 15:41:13 |
| R29.htm | 9423 | 2020-11-02 15:41:13 |
| R3.htm | 24390 | 2020-11-02 15:41:13 |
| R30.htm | 12804 | 2020-11-02 15:41:13 |
| R31.htm | 21484 | 2020-11-02 15:41:13 |
| R32.htm | 11759 | 2020-11-02 15:41:13 |
| R33.htm | 22447 | 2020-11-02 15:41:13 |
| R34.htm | 11051 | 2020-11-02 15:41:13 |
| R35.htm | 8234 | 2020-11-02 15:41:13 |
| R36.htm | 16502 | 2020-11-02 15:41:13 |
| R37.htm | 24985 | 2020-11-02 15:41:13 |
| R38.htm | 9960 | 2020-11-02 15:41:13 |
| R39.htm | 10475 | 2020-11-02 15:41:13 |
| R4.htm | 5620 | 2020-11-02 15:41:13 |
| R40.htm | 7374 | 2020-11-02 15:41:13 |
| R41.htm | 18601 | 2020-11-02 15:41:13 |
| R42.htm | 8947 | 2020-11-02 15:41:13 |
| R43.htm | 6474 | 2020-11-02 15:41:13 |
| R44.htm | 4131 | 2020-11-02 15:41:13 |
| R45.htm | 9367 | 2020-11-02 15:41:13 |
| R46.htm | 26722 | 2020-11-02 15:41:13 |
| R47.htm | 19701 | 2020-11-02 15:41:13 |
| R48.htm | 77965 | 2020-11-02 15:41:13 |
| R49.htm | 13858 | 2020-11-02 15:41:13 |
| R5.htm | 97603 | 2020-11-02 15:41:13 |
| R50.htm | 59983 | 2020-11-02 15:41:13 |
| R51.htm | 20733 | 2020-11-02 15:41:13 |
| R52.htm | 31215 | 2020-11-02 15:41:13 |
| R53.htm | 6879 | 2020-11-02 15:41:13 |
| R54.htm | 13176 | 2020-11-02 15:41:13 |
| R55.htm | 20877 | 2020-11-02 15:41:13 |
| R56.htm | 13593 | 2020-11-02 15:41:13 |
| R57.htm | 20862 | 2020-11-02 15:41:13 |
| R58.htm | 49606 | 2020-11-02 15:41:13 |
| R59.htm | 13288 | 2020-11-02 15:41:13 |
| R6.htm | 12928 | 2020-11-02 15:41:13 |
| R60.htm | 4991 | 2020-11-02 15:41:13 |
| R61.htm | 11512 | 2020-11-02 15:41:13 |
| R62.htm | 8789 | 2020-11-02 15:41:13 |
| R63.htm | 41753 | 2020-11-02 15:41:13 |
| R64.htm | 21242 | 2020-11-02 15:41:13 |
| R65.htm | 17639 | 2020-11-02 15:41:13 |
| R66.htm | 56014 | 2020-11-02 15:41:13 |
| R67.htm | 13372 | 2020-11-02 15:41:13 |
| R68.htm | 26716 | 2020-11-02 15:41:13 |
| R7.htm | 91479 | 2020-11-02 15:41:13 |
| R8.htm | 68944 | 2020-11-02 15:41:13 |
| R9.htm | 6994 | 2020-11-02 15:41:13 |
| report.css | 2767 | 2020-11-02 15:41:13 |
| Show.js | 1085 | 2020-11-02 15:41:13 |