| Cannell Capital, LLC |
2,922,329 |
8.22 |
137,789 |
12/31/20 |
| AIGH Capital Management, LLC. |
2,310,364 |
6.50 |
2,310,364 |
12/31/20 |
| Lytton (Laurence W) |
1,718,303 |
4.83 |
-1,040,575 |
12/31/20 |
| North Sound Management, LLC |
1,652,721 |
4.54 |
-47,279 |
12/31/20 |
| The Vanguard Group, Inc. |
1,530,804 |
4.30 |
-58,167 |
12/31/20 |
| Needham Investment Management L.L.C. |
1,500,000 |
4.22 |
115,000 |
12/31/20 |
| Renaissance Technologies LLC |
1,337,283 |
4.49 |
-9,267 |
12/31/20 |
| Solas Capital Management, LLC |
1,175,000 |
3.30 |
-996,927 |
12/31/20 |
| Dimensional Fund Advisors, L.P. |
1,119,353 |
3.76 |
897 |
12/31/20 |
| Royce Investment Partners |
706,300 |
2.37 |
-- |
12/31/20 |
| Ariel Investments, LLC |
692,171 |
1.95 |
-54,030 |
12/31/20 |
| Worth Venture Partners, LLC |
585,833 |
1.61 |
408,248 |
12/31/20 |
| P.A.W. Capital Partners, LP |
550,000 |
1.85 |
-30,000 |
12/31/20 |
| AWM Investment Company, Inc. |
392,801 |
1.10 |
313,093 |
12/31/20 |
| BlackRock Institutional Trust Company, N.A. |
301,647 |
1.01 |
21,970 |
12/31/20 |
| Rittichier (Jeffrey) |
263,448 |
0.89 |
-3,201 |
12/31/20 |
| EAM Investors, LLC |
239,735 |
0.80 |
239,735 |
12/31/20 |
| Geode Capital Management, L.L.C. |
220,210 |
0.62 |
25,938 |
12/31/20 |
| Bridgeway Capital Management, LLC |
138,627 |
0.39 |
-- |
12/31/20 |
| Susquehanna International Group, LLP |
136,631 |
0.38 |
47,192 |
12/31/20 |
| Kovack Advisors Inc |
131,150 |
0.44 |
131,150 |
12/31/20 |
| Arrowstreet Capital, Limited Partnership |
128,590 |
0.36 |
128,590 |
12/31/20 |
| Fine Gerald J |
92,442 |
0.32 |
25,130 |
3/19/20 |
| Hightower Advisors, LLC |
92,442 |
0.31 |
92,442 |
12/31/20 |
| Argent Wealth Management, LLC |
92,442 |
0.31 |
-- |
6/30/20 |
| Jacobs Levy Equity Management, Inc. |
92,261 |
0.26 |
-34,738 |
12/31/20 |
| Marshall Wace LLP |
85,020 |
0.24 |
85,020 |
12/31/20 |
| Mellon Investments Corporation |
80,000 |
0.27 |
-- |
12/31/20 |
| Adirondack Research & Management Inc. |
76,317 |
0.26 |
-54,224 |
12/31/20 |
| California Public Employees' Retirement System |
75,395 |
0.25 |
-- |
12/31/20 |
| Domenik (Stephen L) |
74,778 |
0.25 |
10,000 |
12/31/20 |
| Northern Trust Investments, Inc. |
69,523 |
0.23 |
-10,615 |
12/31/20 |
| Morgan Stanley Smith Barney LLC |
64,719 |
0.18 |
64,154 |
12/31/20 |
| ExodusPoint Capital Management, LP |
64,285 |
0.18 |
64,285 |
12/31/20 |
| Millennium Management LLC |
61,188 |
0.17 |
41,799 |
12/31/20 |
| Acadian Asset Management LLC |
53,935 |
0.18 |
53,935 |
12/31/20 |
| Boothbay Fund Management, LLC |
42,608 |
0.12 |
42,608 |
12/31/20 |
| Dimensional Fund Advisors, Ltd. |
41,642 |
0.14 |
-- |
12/31/20 |
| SBAuer Funds, LLC |
40,000 |
0.13 |
40,000 |
12/31/20 |
| Two Sigma Investments, LP |
38,825 |
0.11 |
-4,200 |
12/31/20 |
| Jackson (Rex S) |
37,023 |
0.13 |
-- |
12/31/20 |
| Connor, Clark & Lunn Investment Management Ltd. |
36,963 |
0.10 |
36,519 |
12/31/20 |
| Morgan Stanley & Co. LLC |
34,381 |
0.10 |
34,381 |
12/31/20 |
| LMR Partners LLP |
28,281 |
0.08 |
-245 |
12/31/20 |
| GMT Capital Corp. |
27,405 |
0.09 |
-- |
12/31/20 |
| Lu (Albert) |
27,368 |
0.09 |
4,996 |
12/31/20 |
| T. Rowe Price Associates, Inc. |
25,700 |
0.09 |
-- |
11/30/20 |
| Simplex Trading, LLC |
23,224 |
0.08 |
17,539 |
12/31/20 |
| State Street Global Advisors (US) |
22,165 |
0.06 |
-- |
12/31/20 |
| Altium Wealth Management LLC |
22,020 |
0.07 |
-- |
12/31/20 |
