OWNERSHIP PROFILE

SHAREHOLDER BREAKDOWN

Shareholder	Holders	Value ($MM)	% O/S	Shares
Institution	55	113.57	83.39	13,058,362
Mutual Fund	57	23.46	16.16	2,529,791
Insider	4	3.70	3.03	474,963

INSTITUTIONAL SHAREHOLDER ROTATION

Shareholder	Holders	Value Chg ($MM)	% O/S	Share Change
Buyers	15	3.80	3.59	562,945
Sellers	22	-9.59	9.12	-1,428,460
Net	--	-5.79	5.53	-865,515

INSTITUTIONAL SHAREHOLDER CONCENTRATION

	Value ($MM)	% O/S	Shares
Total Inst.	113.57	83.39	13,058,362
Top 10 Inst.	98.22	69.40	10,867,026
Top 20 Inst.	109.40	79.69	12,479,028
Top 50 Inst.	113.56	83.38	13,056,955

INSTITUTIONAL SHAREHOLDER STYLE

	Holders	Value ($MM)	% Inst Shares	Shares
Growth	11	11.72	11.07	1,733,845
Aggressive Growth	4	4.19	3.97	621,401
Core Growth	7	7.52	7.10	1,112,444
Income	2	0.21	0.20	30,899
Income Value	2	0.21	0.20	30,899
Index	8	7.50	6.16	964,043
Other	15	74.50	48.66	7,619,223
Broker Dealer	3	0.09	0.08	13,273
GARP	3	4.47	4.21	658,600
Hedge Fund	8	60.05	38.29	5,996,629
VC/Private Equi	1	9.89	6.07	950,721
Value	10	14.04	13.41	2,100,620
Core Value	6	10.90	10.45	1,635,870
Deep Value	4	3.14	2.97	464,750

TOP HOLDERS: INSTITUTIONAL INVESTOR

Holder	Shares Held	% O/S	Share Change	Filing Date
Grace Brothers Management, LLC	5,363,073	34.25	--	5/29/18
Dimensional Fund Advisors, L.P.	1,060,836	6.77	10,628	12/31/18
NGP Energy Technology Partners, L.P.	950,721	6.07	--	5/29/18
Eliot Rose Asset Management, L.L.C.	727,090	4.64	-502,625	12/31/17
Wellington Management Company, LLP	642,427	4.10	--	12/31/18
Thomson Horstmann & Bryant, Inc.	635,400	4.06	46,587	12/31/18
The Vanguard Group, Inc.	444,652	2.84	953	12/31/18
Franklin Mutual Advisers, LLC	426,600	2.72	426,600	12/31/18
Global X Management Company LLC	345,939	2.21	-17,906	6/30/18
Popielec (Michael D)	270,288	1.73	--	5/29/18
Renaissance Technologies LLC	266,000	1.70	7,900	12/31/18
NorthPointe Capital, LLC	232,823	1.49	-101,221	12/31/18
Monashee Investment Management, LLC	223,155	1.43	-26,845	12/31/18
Mirae Asset Global Investments (USA) LLC	214,515	1.37	-102,996	12/31/18
Bridgeway Capital Management, Inc.	177,000	1.13	-25,000	12/31/18
Essex Investment Management Company, LLC	170,586	1.09	-11,431	12/31/18
Fain (Philip A)	92,229	0.59	22,229	12/28/18
Algert Global LLC	85,089	0.54	-38,645	12/31/18
Singh (Ranjit C)	79,801	0.51	--	5/29/18
Geode Capital Management, L.L.C.	70,804	0.45	--	12/31/18
Saeli (Thomas Louis)	60,446	0.39	2,000	11/14/18
Teton Advisors, Inc.	59,300	0.38	34,300	12/31/18
Shaw (Robert W II)	52,000	0.33	2,000	12/14/18
Manatuck Hill Partners, LLC	48,299	0.31	-92,502	12/31/18
Acadian Asset Management LLC	36,011	0.23	--	12/31/18
BlackRock Institutional Trust Company, N.A.	32,674	0.21	45	12/31/18
California Public Employees' Retirement System	31,400	0.20	--	12/31/18
Tibra Equities Europe, Ltd.	30,888	0.20	30,888	3/31/19
Shikiar Asset Management, Inc.	26,000	0.17	--	12/31/18
Deutsche Asset Management Americas	25,600	0.16	-1,000	12/31/18
Northern Trust Investments, Inc.	25,277	0.16	-300	12/31/18
Alambic Investment Management, L.P.	20,899	0.13	20,899	12/31/18
Anderson (Steven Mark)	18,500	0.12	--	5/29/18
Carosa Stanton Asset Management, LLC	17,400	0.11	--	1/31/19
O'Shaughnessy Asset Management, LLC	11,469	0.07	-2,818	12/31/18
Barclays Capital Inc.	11,433	0.07	6,923	12/31/18
State Street Global Advisors (US)	10,116	0.06	-342	12/31/18
Saturna Capital Corporation	10,000	0.06	--	12/31/18
Morgan Stanley Smith Barney LLC	8,652	0.06	244	12/31/18
T. Rowe Price Associates, Inc.	5,800	0.04	--	12/31/18
Guggenheim Investments	5,591	0.04	33	7/31/17
Prelude Capital Management, LLC	5,349	0.03	3,470	12/31/18
Tower Research Capital LLC	5,264	0.03	4,147	12/31/18
Vericimetry Advisors LLC	5,000	0.03	--	12/31/18
Dimensional Fund Advisors, Ltd.	3,705	0.02	--	2/28/19
Invesco Capital Management LLC	3,181	0.02	-454	1/31/19
Northern Trust Global Investments	1,982	0.01	-300	12/31/18
BlackRock Investment Management, LLC	1,939	0.01	189	12/31/18
AXA Rosenberg Investment Management LLC	1,939	0.01	--	2/28/19
Morgan Stanley & Co. LLC	1,813	0.01	-118	12/31/18

* Insider values reflect direct beneficial ownership.