| ☐ |
Rule 13d-1(b)
|
| ý |
Rule 13d-1(c)
|
| ☐ |
Rule 13d-1(d)
|
|
CUSIP No. 451731103
|
13G
|
Page 2 of 8 Pages
|
||||
|
1
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NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) TANG CAPITAL PARTNERS, LP
|
|||||
|
2
|
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
|
(a) ☐
(b) ý |
||||
|
3
|
SEC USE ONLY
|
|||||
|
4
|
CITIZENSHIP OR PLACE OF ORGANIZATION
DELAWARE
|
|||||
|
NUMBER OF
|
5
|
SOLE VOTING POWER
0
|
||||
|
SHARES
BENEFICIALLY
OWNED BY |
6
|
SHARED VOTING POWER
1,390,802
|
||||
|
EACH REPORTING
PERSON WITH |
7
|
SOLE DISPOSITIVE POWER
0
|
||||
|
8
|
SHARED DISPOSITIVE POWER
1,390,802
|
|||||
|
9
|
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
1,390,802
|
|||||
|
10
|
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
☐
|
|||||
|
11
|
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
2.1%
|
|||||
|
12
|
TYPE OF REPORTING PERSON
PN
|
|||||
|
CUSIP No. 451731103
|
13G
|
Page 3 of 8 Pages
|
||||
|
1
|
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) TANG CAPITAL MANAGEMENT, LLC
|
|||||
|
2
|
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
|
(a) ☐
(b) ý |
||||
|
3
|
SEC USE ONLY
|
|||||
|
4
|
CITIZENSHIP OR PLACE OF ORGANIZATION
DELAWARE
|
|||||
|
NUMBER OF
|
5
|
SOLE VOTING POWER
0
|
||||
|
SHARES
BENEFICIALLY
OWNED BY |
6
|
SHARED VOTING POWER
1,390,802
|
||||
|
EACH REPORTING
PERSON WITH |
7
|
SOLE DISPOSITIVE POWER
0
|
||||
|
8
|
SHARED DISPOSITIVE POWER
1,390,802
|
|||||
|
9
|
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
1,390,802
|
|||||
|
10
|
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
☐
|
|||||
|
11
|
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
2.1%
|
|||||
|
12
|
TYPE OF REPORTING PERSON
OO
|
|||||
|
CUSIP No. 451731103
|
13G
|
Page 4 of 8 Pages
|
||||
|
1
|
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) KEVIN C. TANG
|
|||||
|
2
|
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
|
(a) ☐
(b) ý |
||||
|
3
|
SEC USE ONLY
|
|||||
|
4
|
CITIZENSHIP OR PLACE OF ORGANIZATION
UNITED STATES
|
|||||
|
NUMBER OF
|
5
|
SOLE VOTING POWER
0
|
||||
|
SHARES
BENEFICIALLY
OWNED BY |
6
|
SHARED VOTING POWER
1,390,802
|
||||
|
EACH REPORTING
PERSON WITH |
7
|
SOLE DISPOSITIVE POWER
0
|
||||
|
8
|
SHARED DISPOSITIVE POWER
1,390,802
|
|||||
|
9
|
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
1,390,802
|
|||||
|
10
|
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
☐
|
|||||
|
11
|
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
2.1%
|
|||||
|
12
|
TYPE OF REPORTING PERSON
IN
|
|||||
| Item 1(a). |
Name of Issuer:
|
| Item 1(b). |
Address of Issuer’s Principal Executive Offices:
|
| Item 2(a). |
Name of Person Filing:
|
| Item 2(b). |
Address of Principal Business Office or, if none, Residence:
|
| Item 2(c). |
Citizenship:
|
| Item 2(d). |
Title of Class of Securities:
|
| Item 2(e). |
CUSIP Number: 451731103
|
| Item 3. |
Not applicable.
|
| Item 4. |
Ownership.
|
| (a) |
Amount Beneficially Owned:
|
| (b) |
Percent of Class:
|
|
Tang Capital Partners
|
2.1%
|
|
Tang Capital Management
|
2.1%
|
|
Kevin C. Tang
|
2.1%
|
| (c) |
Number of shares as to which such person has:
|
| (i) |
sole power to vote or to direct the vote:
|
|
Tang Capital Partners
|
0 shares
|
|
Tang Capital Management
|
0 shares
|
|
Kevin C. Tang
|
0 shares
|
| (ii) |
shared power to vote or to direct the vote:
|
|
Tang Capital Partners
|
1,390,802 shares
|
|
Tang Capital Management
|
1,390,802 shares
|
|
Kevin C. Tang
|
1,390,802 shares
|
| (iii) |
sole power to dispose or to direct the disposition of:
|
|
Tang Capital Partners
|
0 shares
|
|
Tang Capital Management
|
0 shares
|
|
Kevin C. Tang
|
0 shares
|
| (iv) |
shared power to dispose or to direct the disposition of:
|
|
Tang Capital Partners
|
1,390,802 shares
|
|
Tang Capital Management
|
1,390,802 shares
|
|
Kevin C. Tang
|
1,390,802 shares
|
| Item 5. |
Ownership of Five Percent or Less of a Class.
|
| Item 6. |
Ownership of More than Five Percent on Behalf of Another Person.
|
| Item 7. |
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company.
|
| Item 8. |
Identification and Classification of Members of the Group.
|
| Item 9. |
Notice of Dissolution of Group.
|
| Item 10. |
Certification.
|
|
Date:
|
February 14, 2018
|
|
|
|
|
|
|
|
|
|
|
|
|
|
TANG CAPITAL PARTNERS, LP
|
|
||
|
|
|
|
|
|
By:
|
Tang Capital Management, LLC, its General Partner
|
|
|
|
|
|
|
|
|
|
|
|
|
|
By:
|
/s/ Kevin C. Tang
|
|
|
|
|
Kevin C. Tang, Manager
|
|
|
|
|
|
|
|
|
|
|
|
|
|
TANG CAPITAL MANAGEMENT, LLC
|
|
||
|
|
|
|
|
|
|
|
|
|
|
By:
|
/s/ Kevin C. Tang
|
|
|
|
|
Kevin C. Tang, Manager
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/s/ Kevin C. Tang
|
|
||
|
Kevin C. Tang
|
|
||