The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
The reader should not assume that the information is accurate and complete.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F INFORMATION TABLE
OMB APPROVAL
OMB Number: 3235-0006
Estimated average burden
hours per response: 23.8
COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5 COLUMN 6 COLUMN 7 COLUMN 8
VALUE SHRS OR SH/ PUT/ INVESTMENT OTHER VOTING AUTHORITY
NAME OF ISSUER TITLE OF CLASS CUSIP (x$1000) PRN AMT PRN CALL DISCRETION MANAGER SOLE SHARED NONE
ARC Document Solutions COM 00191G103 3,322 4,100,776 SH   SOLE   2,050,388 0 2,050,388
AXT Inc COM 00246W103 12,170 3,791,174 SH   SOLE   1,895,587 0 1,895,587
Acacia Research Corp COM 003881307 5,608 2,526,090 SH   SOLE   1,263,045 0 1,263,045
Alpine Income Property Trust COM 02083X103 7,427 603,302 SH   SOLE   301,651 0 301,651
American River Bankshares COM 029326105 6,969 808,516 SH   SOLE   404,258 0 404,258
Amtech Systems COM 032332504 7,739 1,779,012 SH   SOLE   889,506 0 889,506
Asure Software COM 04649U102 12,328 2,068,484 SH   SOLE   1,034,242 0 1,034,242
Atlantic Capital Bank COM 048269203 5,031 423,828 SH   SOLE   211,914 0 211,914
Axos Financial COM 05465C100 809 44,640 SH   SOLE   22,320 0 22,320
BG Staffing COM 05544A109 5,143 687,544 SH   SOLE   343,772 0 343,772
Banc of California Inc COM 05990K106 1,256 156,960 SH   SOLE   78,480 0 78,480
Bank of Commerce Hlds COM 06424J103 8,718 1,107,814 SH   SOLE   553,907 0 553,907
Barrett Business Services Inc COM 068463108 10,015 252,650 SH   SOLE   126,325 0 126,325
BayCom Corp COM 07272M107 2,646 219,598 SH   SOLE   109,799 0 109,799
Bed Bath and Beyond COM 075896100 662 157,260 SH   SOLE   78,630 0 78,630
Big 5 Sporting Goods Corp COM 08915P101 931 870,524 SH   SOLE   435,262 0 435,262
Blucora Inc COM 095229100 689 57,180 SH   SOLE   28,590 0 28,590
Bridgewater Bancshares COM 108621103 2,057 211,000 SH   SOLE   105,500 0 105,500
Build A Bear Workshop COM 120076104 2,241 1,567,438 SH   SOLE   783,719 0 783,719
CAI International Inc COM 12477X106 9,867 697,774 SH   SOLE   348,887 0 348,887
CRH Medical COM 12626F105 7,283 5,435,044 SH   SOLE   2,717,522 0 2,717,522
Caleres Inc COM 129500104 442 85,060 SH   SOLE   42,530 0 42,530
Capital Bancorp COM 139737100 8,200 654,948 SH   SOLE   327,474 0 327,474
Citi Trends Inc COM 17306X102 415 46,660 SH   SOLE   23,330 0 23,330
Civista Bancshares COM 178867107 4,969 332,178 SH   SOLE   166,089 0 166,089
Cohu Inc COM 192576106 12,645 1,021,372 SH   SOLE   510,686 0 510,686
Columbus McKinnon Corp COM 199333105 6,739 269,576 SH   SOLE   134,788 0 134,788
Comfort Systems USA Inc COM 199908104 1,774 48,540 SH   SOLE   24,270 0 24,270
Comtech Telecom Corp COM 205826209 7,856 591,124 SH   SOLE   295,562 0 295,562
ConnectOne Bancorp COM 20786W107 1,609 119,740 SH   SOLE   59,870 0 59,870
Cra Intl Inc COM 12618T105 9,909 296,586 SH   SOLE   148,293 0 148,293
Customers Bancorp COM 23204G100 1,614 147,680 SH   SOLE   73,840 0 73,840
DMC Global Inc COM 23291C103 4,344 188,774 SH   SOLE   94,387 0 94,387
DXP Enterprises, Inc COM 233377407 575 46,880 SH   SOLE   23,440 0 23,440
Daktronics, Inc COM 234264109 916 185,860 SH   SOLE   92,930 0 92,930
EPlus Inc COM 294268107 948 15,140 SH   SOLE   7,570 0 7,570
Eagle Bancorp Montana COM 26942G100 3,664 226,014 SH   SOLE   113,007 0 113,007
Enerpac Tool Group COM 292765104 1,032 62,360 SH   SOLE   31,180 0 31,180
Ennis Inc COM 293389102 2,240 119,300 SH   SOLE   59,650 0 59,650
Esquire Financial Hld COM 29667J101 10,157 674,896 SH   SOLE   337,448 0 337,448
FS Bancorp COM 30263Y104 8,671 240,860 SH   SOLE   120,430 0 120,430
Farmers National Banc Corp COM 309627107 8,176 703,052 SH   SOLE   351,526 0 351,526
First Bancshares Inc COM 318916103 5,159 270,542 SH   SOLE   135,271 0 135,271
First Business Financial Servi COM 319390100 6,682 431,122 SH   SOLE   215,561 0 215,561
First Financial Corp COM 320218100 1,190 35,300 SH   SOLE   17,650 0 17,650
First Northwest COM 335834107 6,144 565,244 SH   SOLE   282,622 0 282,622
FormFactor COM 346375108 1,628 81,060 SH   SOLE   40,530 0 40,530
FreightCar America Inc COM 357023100 902 970,202 SH   SOLE   485,101 0 485,101
Global Medical REIT COM 37954A204 9,851 973,378 SH   SOLE   486,689 0 486,689
Great Ajax Corp COM 38983D300 6,320 993,730 SH   SOLE   496,865 0 496,865
Hallmark Financial Services In COM 40624Q203 806 199,520 SH   SOLE   99,760 0 99,760
Hanger Inc COM 41043F208 1,457 93,540 SH   SOLE   46,770 0 46,770
Healthcare Services Group Inc COM 421906108 1,943 81,280 SH   SOLE   40,640 0 40,640
Heritage Insurance Hlds Inc COM 42727J102 10,822 1,010,422 SH   SOLE   505,211 0 505,211
Hibbett Sports Inc COM 428567101 284 25,980 SH   SOLE   12,990 0 12,990
Horizon Bancorp COM 440407104 6,416 650,710 SH   SOLE   325,355 0 325,355
Houston Wire & Cable Co COM 44244K109 740 337,680 SH   SOLE   168,840 0 168,840
Hurco Companies Inc COM 447324104 9,018 309,900 SH   SOLE   154,950 0 154,950
Ichor Holdings COM G4740B105 1,519 79,300 SH   SOLE   39,650 0 39,650
InTest Corp COM 461147100 2,185 821,576 SH   SOLE   410,788 0 410,788
InnerWorkings COM 45773Y105 2,394 2,046,084 SH   SOLE   1,023,042 0 1,023,042
Insight Enterprises Inc COM 45765U103 2,445 58,040 SH   SOLE   29,020 0 29,020
Intevac Inc COM 461148108 1,366 334,020 SH   SOLE   167,010 0 167,010
LCNB Corp COM 50181P100 6,819 541,172 SH   SOLE   270,586 0 270,586
Landec Corp COM 514766104 9,378 1,079,126 SH   SOLE   539,563 0 539,563
Lifetime Brands Inc COM 53222Q103 6,713 1,188,114 SH   SOLE   594,057 0 594,057
MTS Systems Corp COM 553777103 448 19,900 SH   SOLE   9,950 0 9,950
Manitex International Inc COM 563420108 8,197 1,984,778 SH   SOLE   992,389 0 992,389
Matrix Service Co COM 576853105 1,057 111,620 SH   SOLE   55,810 0 55,810
Medifast Inc COM 58470H101 498 7,960 SH   SOLE   3,980 0 3,980
Meta Financial Group COM 59100U108 2,012 92,620 SH   SOLE   46,310 0 46,310
Metropolitan Bank Hld COM 591774104 9,116 338,518 SH   SOLE   169,259 0 169,259
MidWestOne Financial Group COM 598511103 1,490 71,140 SH   SOLE   35,570 0 35,570
Midland States COM 597742105 7,837 448,086 SH   SOLE   224,043 0 224,043
Mistras Group Inc COM 60649T107 1,750 410,716 SH   SOLE   205,358 0 205,358
NN Inc COM 629337106 1,753 1,013,354 SH   SOLE   506,677 0 506,677
NV5 Global Inc COM 62945V109 1,592 38,560 SH   SOLE   19,280 0 19,280
Natural Gas Services Group Inc COM 63886Q109 4,322 968,980 SH   SOLE   484,490 0 484,490
Netgear Inc COM 64111Q104 990 43,360 SH   SOLE   21,680 0 21,680
Newpark Resources Inc COM 651718504 182 202,640 SH   SOLE   101,320 0 101,320
Northeast Bank COM 66405S100 8,489 728,050 SH   SOLE   364,025 0 364,025
Northwest Pipe COM 667746101 12,727 571,984 SH   SOLE   285,992 0 285,992
One Stop Systems COM 68247W109 2,064 1,433,284 SH   SOLE   716,642 0 716,642
Onto Innovation Inc COM 683344105 1,870 63,042 SH   SOLE   31,521 0 31,521
Orrstown Financial Services COM 687380105 3,727 270,674 SH   SOLE   135,337 0 135,337
PAM Transportation Services, I COM 693149106 6,020 195,762 SH   SOLE   97,881 0 97,881
PC Connection COM 69318J100 1,954 47,420 SH   SOLE   23,710 0 23,710
PRA Group COM 69354N106 1,577 56,880 SH   SOLE   28,440 0 28,440
Pacific Premier Bancorp Inc COM 69478X105 871 46,220 SH   SOLE   23,110 0 23,110
Parke Bancorp COM 700885106 7,804 578,480 SH   SOLE   289,240 0 289,240
Patrick Industries COM 703343103 1,348 47,880 SH   SOLE   23,940 0 23,940
Pennantpark Floating Rate Capi COM 70806A106 4,007 824,400 SH   SOLE   412,200 0 412,200
Photronics Inc COM 719405102 2,258 220,100 SH   SOLE   110,050 0 110,050
Premier Financial Bancorp COM 74050M105 8,671 699,252 SH   SOLE   349,626 0 349,626
ProFire Energy COM 74316X101 2,510 3,187,126 SH   SOLE   1,593,563 0 1,593,563
Quantum Corp COM 747906501 1,858 629,808 SH   SOLE   314,904 0 314,904
Resources Connection COM 76122Q105 1,191 108,580 SH   SOLE   54,290 0 54,290
Ribbon Communications Inc COM 762544104 1,117 368,560 SH   SOLE   184,280 0 184,280
Riverview Bancorp COM 769397100 7,330 1,463,058 SH   SOLE   731,529 0 731,529
SMTC COM 832682207 233 100,000 SH   SOLE   50,000 0 50,000
SP Plus Corp COM 78469C103 1,301 62,680 SH   SOLE   31,340 0 31,340
Shoe Carnival Inc COM 824889109 3,997 192,440 SH   SOLE   96,220 0 96,220
Silvercrest Asset Mgmnt Grp Cl COM 828359109 7,681 811,936 SH   SOLE   405,968 0 405,968
Spartan Motors Inc COM 846819100 14,719 1,140,090 SH   SOLE   570,045 0 570,045
Standard Motor COM 853666105 1,888 45,420 SH   SOLE   22,710 0 22,710
Sterling Bancorp COM 85917W102 137 31,806 SH   SOLE   15,903 0 15,903
Sterling Construction Co Inc COM 859241101 6,914 727,780 SH   SOLE   363,890 0 363,890
Super Micro Computer, Inc COM 86800U104 1,153 54,180 SH   SOLE   27,090 0 27,090
Sykes Enterprises COM 871237103 1,267 46,720 SH   SOLE   23,360 0 23,360
Textainer Group Holdings COM G8766E109 2,036 247,660 SH   SOLE   123,830 0 123,830
Tristate Capital Hlds COM 89678F100 569 58,820 SH   SOLE   29,410 0 29,410
Triumph Bancorp COM 89679E300 874 33,600 SH   SOLE   16,800 0 16,800
TrueBlue Inc COM 89785X101 1,016 79,640 SH   SOLE   39,820 0 39,820
Twin Disc Inc COM 901476101 9,780 1,401,134 SH   SOLE   700,567 0 700,567
Ultra Clean Holdings COM 90385V107 12,939 937,578 SH   SOLE   468,789 0 468,789
Unique Fabricating COM 90915J103 3,552 1,518,060 SH   SOLE   759,030 0 759,030
Universal Electronics Inc COM 913483103 9,942 259,110 SH   SOLE   129,555 0 129,555
Univeste Financial Corp COM 915271100 992 60,780 SH   SOLE   30,390 0 30,390
Veritex Holdings COM 923451108 866 61,970 SH   SOLE   30,985 0 30,985
Wabash National Corp COM 929566107 1,336 184,980 SH   SOLE   92,490 0 92,490
West Bancorporation COM 95123P106 8,780 536,974 SH   SOLE   268,487 0 268,487
ZAGG Inc COM 98884U108 8,436 2,712,542 SH   SOLE   1,356,271 0 1,356,271
Zovio COM 98979V102 2,912 1,765,006 SH   SOLE   882,503 0 882,503