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PRKR        0000914139    
Filing Date Form Type Description Document
2020-04-21 SC 13G/A View Document
2020-04-21 S-1 S-1 View Document
2020-04-21 S-8 S-8 View Document
2020-04-20 424B3 PROSPECTUS SUPPLEMENT 6 View Document
2020-04-20 424B3 RESALE PROSPECTUS SUPPLEMENT 12 View Document
2020-04-20 424B3 UPDATE PROSPECTUS SUPPLEMENT 12 View Document
2020-04-14 10-K 10-K View Document
2020-04-14 8-K CURRENT REPORT View Document
2020-03-30 NT 10-K View Document
2020-03-17 D View Document
2020-03-17 D View Document
2020-03-06 424B3 PRIMARY DOCUMENT View Document
2020-03-06 424B3 PRIMARY DOCUMENT View Document
2020-03-06 424B3 PRIMARY DOCUMENT View Document
2020-03-05 8-K PRIMARY DOCUMENT View Document
2020-02-14 5 FORM 5 View Document
2020-02-14 5 FORM 5 View Document
2020-02-14 5 FORM 5 View Document
2020-02-13 5 PRIMARY DOCUMENT View Document
2020-02-13 8-K CURRENT REPORT View Document
2020-02-11 4 PRIMARY DOCUMENT View Document
2020-02-11 4 PRIMARY DOCUMENT View Document
2020-02-11 4 PRIMARY DOCUMENT View Document
2020-02-11 4 PRIMARY DOCUMENT View Document
2020-02-11 4 PRIMARY DOCUMENT View Document
2020-02-11 4 PRIMARY DOCUMENT View Document
2020-02-11 4 PRIMARY DOCUMENT View Document
2020-01-28 424B3 PRIMARY DOCUMENT View Document
2020-01-28 424B3 PRIMARY DOCUMENT View Document
2020-01-28 424B3 PRIMARY DOCUMENT View Document
2020-01-22 D View Document
2020-01-21 8-K CURRENT REPORT View Document
2020-01-14 D View Document
2020-01-14 424B3 PRIMARY DOCUMENT View Document
2020-01-14 424B3 PRIMARY DOCUMENT View Document
2020-01-14 424B3 PRIMARY DOCUMENT View Document
2020-01-10 8-K CURRENT REPORT View Document
2019-11-20 424B3 PRIMARY DOCUMENT View Document
2019-11-20 424B3 PRIMARY DOCUMENT View Document
2019-11-20 424B3 PRIMARY DOCUMENT View Document
2019-11-19 8-K CURRENT REPORT View Document
2019-11-14 10-Q PRIMARY DOCUMENT View Document
2019-11-14 8-K PRIMARY DOCUMENT View Document
2019-10-01 DEFA14A DEFA14A View Document
2019-10-01 DEF 14A INFORMATION STATEMENT View Document
2019-09-27 D View Document
2019-09-23 DEFA14A DEFA14A View Document
2019-09-20 PRE 14A PROXY STATEMENT View Document
2019-09-17 424B3 424B3 View Document
2019-09-17 424B3 PRIMARY DOCUMENT View Document
2019-09-17 424B3 PRIMARY DOCUMENT View Document
2019-09-16 8-K CURRENT REPORT View Document
2019-09-11 424B3 424B3 View Document
2019-09-09 EFFECT View Document
2019-09-09 POS AM POS AM View Document
2019-09-03 EFFECT View Document
2019-09-03 POS AM PRIMARY DOCUMENT View Document
2019-08-28 EFFECT View Document
2019-08-27 CORRESP View Document
2019-08-27 UPLOAD View Document
2019-08-21 S-1 S-1 View Document
2019-08-15 424B3 PRIMARY DOCUMENT View Document
2019-08-15 424B3 PRIMARY DOCUMENT View Document
2019-08-14 10-Q PRIMARY DOCUMENT View Document
2019-08-14 8-K CURRENT REPORT View Document
2019-08-09 4 PRIMARY DOCUMENT View Document
2019-08-09 4 PRIMARY DOCUMENT View Document
2019-08-09 4 PRIMARY DOCUMENT View Document
2019-08-09 4 PRIMARY DOCUMENT View Document
2019-08-09 4 PRIMARY DOCUMENT View Document
2019-08-09 4 PRIMARY DOCUMENT View Document
2019-08-09 8-K CURRENT REPORT View Document
2019-07-30 D View Document
2019-07-24 424B3 PRIMARY DOCUMENT View Document
2019-07-24 424B3 PRIMARY DOCUMENT View Document
2019-07-23 8-K CURRENT REPORT ON FORM 8-K View Document
2019-06-27 D View Document
2019-06-26 424B3 PRIMARY DOCUMENT View Document
2019-06-26 424B3 PRIMARY DOCUMENT View Document
2019-06-25 8-K PRIMARY DOCUMENT View Document
2019-06-14 424B3 PRIMARY DOCUMENT View Document
2019-06-14 424B3 PRIMARY DOCUMENT View Document
2019-06-13 8-K CURRENT REPORT View Document
2019-05-16 424B3 UPDATE PROSPECTUS SUPPLEMENT 2 CORRECTION View Document
2019-05-15 424B3 UPDATE PROSPECTUS SUPPLEMENT 2 View Document
2019-05-15 424B3 RESALE PROSPECTUS UPDATE 2 View Document
2019-05-15 8-K 8-K View Document
2019-05-15 10-Q 10-Q View Document
2019-04-29 424B3 View Document
2019-04-29 424B3 View Document
2019-04-29 8-K 8-K View Document
2019-04-22 424B3 UPDATE PROSPECTUS View Document
2019-04-22 424B3 View Document
2019-04-19 EFFECT View Document
2019-04-17 CORRESP View Document
2019-04-17 UPLOAD View Document
2019-04-15 S-1 S-1 View Document
2019-04-05 8-K View Document
2019-04-01 10-K 10-K View Document
2019-03-20 D View Document

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