| Symbol | Relationship | Date | Transaction | Cost | # Shares | Value($) | Total Shares | Form 4 |
| NSYS | Director | Apr 12, 2022 | Buy | $10.00 | 1 | 10 | 64,497 | Apr 12, 2022, 04:11 PM |
| NSYS | Director | Apr 11, 2022 | Buy | $10.02 | 585 | 5,863 | 64,496 | Apr 12, 2022, 04:11 PM |
| NSYS | Director | Apr 08, 2022 | Buy | $10.00 | 296 | 2,960 | 63,911 | Apr 12, 2022, 04:11 PM |
| NSYS | Director | Mar 31, 2022 | Buy | $10.10 | 13 | 131 | 63,615 | Apr 04, 2022, 04:25 PM |
| NSYS | Director | Mar 30, 2022 | Buy | $10.13 | 1,587 | 16,076 | 63,602 | Mar 30, 2022, 06:25 PM |
| NSYS | Director | Mar 29, 2022 | Buy | $10.17 | 1,587 | 16,140 | 62,015 | Mar 30, 2022, 06:25 PM |
| NSYS | Director | Mar 28, 2022 | Buy | $9.99 | 1,578 | 15,766 | 60,428 | Mar 30, 2022, 06:25 PM |
| NSYS | Director | Mar 25, 2022 | Buy | $9.93 | 744 | 7,385 | 58,850 | Mar 25, 2022, 05:34 PM |
| NSYS | Director | Mar 24, 2022 | Buy | $9.66 | 744 | 7,188 | 58,106 | Mar 25, 2022, 05:34 PM |
| NSYS | Director | Mar 23, 2022 | Buy | $10.15 | 744 | 7,553 | 57,362 | Mar 25, 2022, 05:34 PM |
| NSYS | Director | Mar 17, 2022 | Option Exercise | $11.80 | 3,000 | 35,400 | 56,618 | Mar 21, 2022, 09:57 PM |
| NSYS | Director | Feb 25, 2022 | Buy | $10.15 | 845 | 8,576 | 53,618 | Mar 01, 2022, 05:16 PM |
| NSYS | Director | Feb 24, 2022 | Buy | $9.95 | 845 | 8,408 | 52,773 | Feb 25, 2022, 04:50 PM |
| NSYS | Director | Feb 23, 2022 | Buy | $10.13 | 767 | 7,767 | 51,928 | Feb 25, 2022, 04:50 PM |
| NSYS | Director | Feb 17, 2022 | Buy | $10.15 | 838 | 8,506 | 50,316 | Feb 22, 2022, 06:08 PM |
| NSYS | Director | Feb 22, 2022 | Buy | $9.95 | 845 | 8,408 | 51,161 | Feb 22, 2022, 06:08 PM |
| NSYS | Director | Feb 08, 2022 | Buy | $10.00 | 767 | 7,670 | 47,035 | Feb 10, 2022, 05:01 PM |
| NSYS | Director | Feb 07, 2022 | Buy | $10.18 | 767 | 7,808 | 46,268 | Feb 07, 2022, 02:55 PM |
| NSYS | Director | Feb 03, 2022 | Buy | $10.16 | 995 | 10,114 | 45,501 | Feb 07, 2022, 02:55 PM |
| NSYS | Director | Feb 01, 2022 | Buy | $10.17 | 995 | 10,123 | 43,511 | Feb 02, 2022, 04:44 PM |
| NSYS | Director | Jan 31, 2022 | Buy | $10.05 | 995 | 9,995 | 42,516 | Feb 02, 2022, 04:44 PM |
| NSYS | Director | Feb 02, 2022 | Buy | $10.18 | 995 | 10,129 | 44,506 | Feb 02, 2022, 04:44 PM |
| NSYS | Director | Jan 28, 2022 | Buy | $10.00 | 964 | 9,640 | 41,521 | Jan 28, 2022, 05:40 PM |
| NSYS | Director | Jan 27, 2022 | Buy | $10.10 | 678 | 6,849 | 40,557 | Jan 28, 2022, 05:40 PM |
| NSYS | Director | Jan 26, 2022 | Buy | $10.15 | 964 | 9,781 | 39,879 | Jan 28, 2022, 05:40 PM |
| NSYS | Director | Jan 24, 2022 | Buy | $10.10 | 100 | 1,010 | 37,951 | Jan 26, 2022, 11:20 AM |
| NSYS | Director | Jan 25, 2022 | Buy | $10.04 | 964 | 9,675 | 38,915 | Jan 26, 2022, 11:20 AM |
| NSYS | Director | Jan 20, 2022 | Buy | $10.05 | 60 | 603 | 37,851 | Jan 20, 2022, 04:43 PM |
| NSYS | Director | Jan 19, 2022 | Buy | $10.16 | 852 | 8,656 | 37,791 | Jan 20, 2022, 04:43 PM |
| NSYS | Director | May 08, 2019 | Buy | $4.00 | 510 | 2,040 | 36,939 | May 08, 2019, 04:26 PM |
| NSYS | Director | May 07, 2019 | Buy | $4.00 | 1,281 | 5,124 | 36,429 | May 08, 2019, 04:26 PM |
| NSYS | Director | May 06, 2019 | Buy | $4.00 | 1,318 | 5,272 | 35,148 | May 06, 2019, 03:55 PM |
| NSYS | Director | May 02, 2019 | Buy | $3.95 | 100 | 395 | 33,830 | May 06, 2019, 03:55 PM |
| NSYS | Director | Dec 21, 2018 | Buy | $4.00 | 10 | 40 | 33,730 | Dec 21, 2018, 06:36 PM |
| NSYS | Director | Dec 20, 2018 | Buy | $3.91 | 1,750 | 6,848 | 33,720 | Dec 21, 2018, 06:36 PM |
| NSYS | Director | Sep 13, 2018 | Buy | $4.00 | 490 | 1,960 | 31,970 | Sep 17, 2018, 04:44 PM |
| NSYS | Director | Aug 23, 2018 | Buy | $4.00 | 830 | 3,320 | 31,480 | Aug 27, 2018, 05:02 PM |
| NSYS | Director | Aug 21, 2017 | Buy | $3.40 | 750 | 2,549 | 30,650 | Aug 23, 2017, 10:02 AM |
| NSYS | Director | Nov 30, 2016 | Buy | $3.96 | 5,000 | 19,821 | 29,900 | Dec 02, 2016, 02:54 PM |
| NSYS | Director | Jun 03, 2016 | Buy | $3.78 | 11,333 | 42,872 | 24,900 | Jun 06, 2016, 04:31 PM |
| NSYS | Director | Jun 02, 2016 | Buy | $3.75 | 1,067 | 4,001 | 13,567 | Jun 06, 2016, 04:31 PM |
| NSYS | Director | Mar 16, 2016 | Buy | $4.00 | 12,500 | 50,000 | 12,500 | Mar 18, 2016, 06:15 PM |
| RGS | Director | Oct 26, 2010 | Option Exercise | $15.13 | 1,000 | 15,125 | 24,258 | Oct 28, 2010, 01:20 PM |
| RGS | Director | Jan 30, 2009 | Sale | $11.75 | 1,257 | 14,770 | 23,258 | Oct 14, 2010, 04:29 PM |
| RGS | Director | Dec 05, 2007 | Sale | $28.20 | 2,200 | 62,040 | 24,515 | Oct 14, 2010, 04:29 PM |
| Symbol | Relationship | Date | Transaction | Value($) |
| NSYS | Director | Apr 12, 2022 | Buy | 10 |
| NSYS | Director | Apr 11, 2022 | Buy | 5,863 |
| NSYS | Director | Apr 08, 2022 | Buy | 2,960 |
| NSYS | Director | Mar 31, 2022 | Buy | 131 |
| NSYS | Director | Mar 30, 2022 | Buy | 16,076 |
| NSYS | Director | Mar 29, 2022 | Buy | 16,140 |
| NSYS | Director | Mar 28, 2022 | Buy | 15,766 |
| NSYS | Director | Mar 25, 2022 | Buy | 7,385 |
| NSYS | Director | Mar 24, 2022 | Buy | 7,188 |
| NSYS | Director | Mar 23, 2022 | Buy | 7,553 |
| NSYS | Director | Mar 17, 2022 | Option Exercise | 35,400 |
| NSYS | Director | Feb 25, 2022 | Buy | 8,576 |
| NSYS | Director | Feb 24, 2022 | Buy | 8,408 |
| NSYS | Director | Feb 23, 2022 | Buy | 7,767 |
| NSYS | Director | Feb 17, 2022 | Buy | 8,506 |
| NSYS | Director | Feb 22, 2022 | Buy | 8,408 |
| NSYS | Director | Feb 08, 2022 | Buy | 7,670 |
| NSYS | Director | Feb 07, 2022 | Buy | 7,808 |
| NSYS | Director | Feb 03, 2022 | Buy | 10,114 |
| NSYS | Director | Feb 01, 2022 | Buy | 10,123 |
| NSYS | Director | Jan 31, 2022 | Buy | 9,995 |
| NSYS | Director | Feb 02, 2022 | Buy | 10,129 |
| NSYS | Director | Jan 28, 2022 | Buy | 9,640 |
| NSYS | Director | Jan 27, 2022 | Buy | 6,849 |
| NSYS | Director | Jan 26, 2022 | Buy | 9,781 |
| NSYS | Director | Jan 24, 2022 | Buy | 1,010 |
| NSYS | Director | Jan 25, 2022 | Buy | 9,675 |
| NSYS | Director | Jan 20, 2022 | Buy | 603 |
| NSYS | Director | Jan 19, 2022 | Buy | 8,656 |
| NSYS | Director | May 08, 2019 | Buy | 2,040 |
| NSYS | Director | May 07, 2019 | Buy | 5,124 |
| NSYS | Director | May 06, 2019 | Buy | 5,272 |
| NSYS | Director | May 02, 2019 | Buy | 395 |
| NSYS | Director | Dec 21, 2018 | Buy | 40 |
| NSYS | Director | Dec 20, 2018 | Buy | 6,848 |
| NSYS | Director | Sep 13, 2018 | Buy | 1,960 |
| NSYS | Director | Aug 23, 2018 | Buy | 3,320 |
| NSYS | Director | Aug 21, 2017 | Buy | 2,549 |
| NSYS | Director | Nov 30, 2016 | Buy | 19,821 |
| NSYS | Director | Jun 03, 2016 | Buy | 42,872 |
| NSYS | Director | Jun 02, 2016 | Buy | 4,001 |
| NSYS | Director | Mar 16, 2016 | Buy | 50,000 |
| RGS | Director | Oct 26, 2010 | Option Exercise | 15,125 |
| RGS | Director | Jan 30, 2009 | Sale | 14,770 |
| RGS | Director | Dec 05, 2007 | Sale | 62,040 |