Note 1 - The Company and Operations	12 Months Ended
Sep. 30, 2020
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	1. THE COMPANY AND OPERATIONS Daily Journal Corporation (“Daily Journal”) publishes newspapers and websites covering California and Arizona and produces several specialized information services. It also serves as a newspaper representative specializing in public notice advertising. Journal Technologies, Inc. (“Journal Technologies”), a wholly-owned subsidiary of Daily Journal, supplies case management software systems and related products to courts, prosecutor and public defender offices, probation departments and other justice agencies, including administrative law organizations, city and county governments and bar associations. These organizations use the Journal Technologies family of products to help manage cases and information electronically, to interface with other critical justice partners and to extend electronic services to the public, including efiling and a website to pay traffic citations and fees online, and bar members. These products are licensed to more than 500 organizations in 42 states and internationally. Essentially all of the Company’s U.S. operations are based in California, Arizona and Utah. The Company also has a presence in Australia where Journal Technologies is working on three software installation projects.

Note 1 - The Company and Operations

12 Months Ended

Sep. 30, 2020

Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]

1. THE COMPANY AND OPERATIONS

Daily Journal Corporation (“Daily Journal”) publishes newspapers and websites covering California and Arizona and produces several specialized information services. It also serves as a newspaper representative specializing in public notice advertising.

Journal Technologies, Inc. (“Journal Technologies”), a wholly-owned subsidiary of Daily Journal, supplies case management software systems and related products to courts, prosecutor and public defender offices, probation departments and other justice agencies, including administrative law organizations, city and county governments and bar associations. These organizations use the Journal Technologies family of products to help manage cases and information electronically, to interface with other critical justice partners and to extend electronic services to the public, including efiling and a website to pay traffic citations and fees online, and bar members. These products are licensed to more than 500 organizations in 42 states and internationally.

Essentially all of the Company’s U.S. operations are based in California, Arizona and Utah. The Company also has a presence in Australia where Journal Technologies is working on three software installation projects.