Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000910638-20-000025-index-headers.html | 2020-08-05 16:13:23 | |
| 0000910638-20-000025-index.html | 2020-08-05 16:13:23 | |
| 0000910638-20-000025.txt | 2020-08-05 16:13:23 | |
 0000910638-20-000025-xbrl.zip | 238383 | 2020-08-05 16:13:23 |
| ddd-20200630.htm | 1824691 | 2020-08-05 16:13:23 |
| ddd-20200630.xsd | 36258 | 2020-08-05 16:13:23 |
| ddd-20200630ex311.htm | 14325 | 2020-08-05 16:13:23 |
| ddd-20200630ex312.htm | 14664 | 2020-08-05 16:13:23 |
| ddd-20200630ex321.htm | 6669 | 2020-08-05 16:13:23 |
| ddd-20200630ex322.htm | 6645 | 2020-08-05 16:13:23 |
| ddd-20200630_cal.xml | 97459 | 2020-08-05 16:13:23 |
| ddd-20200630_def.xml | 137012 | 2020-08-05 16:13:23 |
 ddd-20200630_g1.jpg | 13081 | 2020-08-05 16:13:23 |
| ddd-20200630_htm.xml | 1309349 | 2020-08-05 16:13:23 |
| ddd-20200630_lab.xml | 484784 | 2020-08-05 16:13:23 |
| ddd-20200630_pre.xml | 293828 | 2020-08-05 16:13:23 |
| FilingSummary.xml | 32285 | 2020-08-05 16:13:23 |
| Financial_Report.xlsx | 81292 | 2020-08-05 16:13:23 |
| MetaLinks.json | 528447 | 2020-08-05 16:13:23 |
| R1.htm | 52255 | 2020-08-05 16:13:23 |
| R10.htm | 25203 | 2020-08-05 16:13:23 |
| R11.htm | 199324 | 2020-08-05 16:13:23 |
| R12.htm | 16963 | 2020-08-05 16:13:23 |
| R13.htm | 59890 | 2020-08-05 16:13:23 |
| R14.htm | 38991 | 2020-08-05 16:13:23 |
| R15.htm | 9690 | 2020-08-05 16:13:23 |
| R16.htm | 20892 | 2020-08-05 16:13:23 |
| R17.htm | 7072 | 2020-08-05 16:13:23 |
| R18.htm | 27608 | 2020-08-05 16:13:23 |
| R19.htm | 43979 | 2020-08-05 16:13:23 |
| R2.htm | 104324 | 2020-08-05 16:13:23 |
| R20.htm | 10605 | 2020-08-05 16:13:23 |
| R21.htm | 18945 | 2020-08-05 16:13:23 |
| R22.htm | 5808 | 2020-08-05 16:13:23 |
| R23.htm | 8204 | 2020-08-05 16:13:23 |
| R24.htm | 34140 | 2020-08-05 16:13:23 |
| R25.htm | 126768 | 2020-08-05 16:13:23 |
| R26.htm | 16419 | 2020-08-05 16:13:23 |
| R27.htm | 59043 | 2020-08-05 16:13:23 |
| R28.htm | 39768 | 2020-08-05 16:13:23 |
| R29.htm | 14591 | 2020-08-05 16:13:23 |
| R3.htm | 13410 | 2020-08-05 16:13:23 |
| R30.htm | 25484 | 2020-08-05 16:13:23 |
| R31.htm | 37995 | 2020-08-05 16:13:23 |
| R32.htm | 16422 | 2020-08-05 16:13:23 |
| R33.htm | 9387 | 2020-08-05 16:13:23 |
| R34.htm | 19042 | 2020-08-05 16:13:23 |
| R35.htm | 18611 | 2020-08-05 16:13:23 |
| R36.htm | 40284 | 2020-08-05 16:13:23 |
| R37.htm | 8763 | 2020-08-05 16:13:23 |
| R38.htm | 12986 | 2020-08-05 16:13:23 |
| R39.htm | 11851 | 2020-08-05 16:13:23 |
| R4.htm | 66080 | 2020-08-05 16:13:23 |
| R40.htm | 7359 | 2020-08-05 16:13:23 |
| R41.htm | 5619 | 2020-08-05 16:13:23 |
| R42.htm | 34100 | 2020-08-05 16:13:23 |
| R43.htm | 24326 | 2020-08-05 16:13:23 |
| R44.htm | 16184 | 2020-08-05 16:13:23 |
| R45.htm | 33887 | 2020-08-05 16:13:23 |
| R46.htm | 34952 | 2020-08-05 16:13:23 |
| R47.htm | 9870 | 2020-08-05 16:13:23 |
| R48.htm | 17440 | 2020-08-05 16:13:23 |
| R49.htm | 4856 | 2020-08-05 16:13:23 |
| R5.htm | 38006 | 2020-08-05 16:13:23 |
| R50.htm | 17430 | 2020-08-05 16:13:23 |
| R51.htm | 13897 | 2020-08-05 16:13:23 |
| R52.htm | 29859 | 2020-08-05 16:13:23 |
| R53.htm | 11989 | 2020-08-05 16:13:23 |
| R54.htm | 22045 | 2020-08-05 16:13:23 |
| R6.htm | 99029 | 2020-08-05 16:13:23 |
| R7.htm | 8170 | 2020-08-05 16:13:23 |
| R8.htm | 55229 | 2020-08-05 16:13:23 |
| R9.htm | 15198 | 2020-08-05 16:13:23 |
| report.css | 2767 | 2020-08-05 16:13:23 |
| Show.js | 1085 | 2020-08-05 16:13:23 |