{"cik":807863,"taxonomy":"us-gaap","tag":"EarningsPerShareBasicAndDiluted","label":"Earnings Per Share, Basic and Diluted","description":"The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.","entityName":"MITEK SYSTEMS, INC.","units":{"USD/shares":[{"start":"2009-10-01","end":"2010-09-30","val":-0.04,"accn":"0001193125-11-342502","fy":2011,"fp":"FY","form":"10-K","filed":"2011-12-15","frame":"CY2010"},{"start":"2010-10-01","end":"2011-09-30","val":-0.01,"accn":"0001193125-11-342502","fy":2011,"fp":"FY","form":"10-K","filed":"2011-12-15"},{"start":"2010-10-01","end":"2011-09-30","val":-0.01,"accn":"0001193125-12-495286","fy":2012,"fp":"FY","form":"10-K","filed":"2012-12-07"},{"start":"2010-10-01","end":"2011-09-30","val":-0.01,"accn":"0001193125-13-471705","fy":2013,"fp":"FY","form":"10-K","filed":"2013-12-12","frame":"CY2011"},{"start":"2011-10-01","end":"2012-03-31","val":-0.11,"accn":"0001193125-13-205834","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-05-08"},{"start":"2012-01-01","end":"2012-03-31","val":-0.11,"accn":"0001193125-13-205834","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-05-08","frame":"CY2012Q1"},{"start":"2011-10-01","end":"2012-06-30","val":-0.19,"accn":"0001193125-13-321455","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-08-06"},{"start":"2012-04-01","end":"2012-06-30","val":-0.08,"accn":"0001193125-13-321455","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-08-06","frame":"CY2012Q2"},{"start":"2011-10-01","end":"2012-09-30","val":-0.31,"accn":"0001193125-12-495286","fy":2012,"fp":"FY","form":"10-K","filed":"2012-12-07"},{"start":"2011-10-01","end":"2012-09-30","val":-0.31,"accn":"0001193125-13-471705","fy":2013,"fp":"FY","form":"10-K","filed":"2013-12-12"},{"start":"2011-10-01","end":"2012-09-30","val":-0.31,"accn":"0001193125-14-434645","fy":2014,"fp":"FY","form":"10-K","filed":"2014-12-05","frame":"CY2012"},{"start":"2012-09-27","end":"2012-12-31","val":-0.05,"accn":"0001193125-14-040698","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-02-07","frame":"CY2012Q4"},{"start":"2012-09-27","end":"2013-03-31","val":-0.14,"accn":"0001193125-14-194431","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-05-12"},{"start":"2012-10-01","end":"2013-03-31","val":-0.14,"accn":"0001193125-13-205834","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-05-08"},{"start":"2013-01-01","end":"2013-03-31","val":-0.09,"accn":"0001193125-13-205834","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-05-08"},{"start":"2013-01-01","end":"2013-03-31","val":-0.09,"accn":"0001193125-14-194431","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2012-10-01","end":"2013-06-30","val":-0.22,"accn":"0001193125-13-321455","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-08-06"},{"start":"2012-10-01","end":"2013-06-30","val":-0.22,"accn":"0001193125-14-302858","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-08-08"},{"start":"2013-04-01","end":"2013-06-30","val":-0.08,"accn":"0001193125-13-321455","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-08-06"},{"start":"2013-04-01","end":"2013-06-30","val":-0.08,"accn":"0001193125-14-302858","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-08-08","frame":"CY2013Q2"},{"start":"2012-10-01","end":"2013-09-30","val":-0.26,"accn":"0001193125-13-471705","fy":2013,"fp":"FY","form":"10-K","filed":"2013-12-12"},{"start":"2012-10-01","end":"2013-09-30","val":-0.26,"accn":"0001193125-14-434645","fy":2014,"fp":"FY","form":"10-K","filed":"2014-12-05","frame":"CY2013"},{"start":"2013-10-01","end":"2013-12-31","val":-0.05,"accn":"0001193125-14-040698","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-02-07"},{"start":"2013-10-01","end":"2013-12-31","val":-0.05,"accn":"0001193125-15-037050","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-02-06","frame":"CY2013Q4"},{"start":"2013-10-01","end":"2014-03-31","val":-0.12,"accn":"0001193125-14-194431","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-05-12"},{"start":"2014-01-01","end":"2014-03-31","val":-0.07,"accn":"0001193125-14-194431","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1"},{"start":"2013-10-01","end":"2014-06-30","val":-0.17,"accn":"0001193125-14-302858","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-08-08"},{"start":"2014-04-01","end":"2014-06-30","val":-0.05,"accn":"0001193125-14-302858","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-08-08","frame":"CY2014Q2"},{"start":"2013-10-01","end":"2014-09-30","val":-0.17,"accn":"0001193125-14-434645","fy":2014,"fp":"FY","form":"10-K","filed":"2014-12-05","frame":"CY2014"},{"start":"2014-10-01","end":"2014-12-31","val":0,"accn":"0001193125-15-037050","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-02-06","frame":"CY2014Q4"},{"start":"2015-10-01","end":"2015-12-31","val":-0.01,"accn":"0001564590-17-000968","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-02-03","frame":"CY2015Q4"},{"start":"2016-10-01","end":"2016-12-31","val":-0.02,"accn":"0001564590-17-000968","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-02-03"},{"start":"2016-10-01","end":"2016-12-31","val":-0.02,"accn":"0000807863-18-000008","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-02-01","frame":"CY2016Q4"},{"start":"2017-10-01","end":"2017-12-31","val":-0.17,"accn":"0000807863-18-000008","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-02-01"},{"start":"2017-10-01","end":"2017-12-31","val":-0.17,"accn":"0000807863-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-02-08"},{"start":"2017-10-01","end":"2017-12-31","val":-0.17,"accn":"0000807863-19-000080","fy":2019,"fp":"FY","form":"10-K","filed":"2019-12-06"},{"start":"2017-10-01","end":"2017-12-31","val":-0.17,"accn":"0000807863-20-000136","fy":2020,"fp":"FY","form":"10-K","filed":"2020-12-07","frame":"CY2017Q4"},{"start":"2017-10-01","end":"2018-03-31","val":-0.2,"accn":"0000807863-19-000030","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-05-07"},{"start":"2018-01-01","end":"2018-03-31","val":-0.03,"accn":"0000807863-19-000030","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-05-07"},{"start":"2018-01-01","end":"2018-03-31","val":-0.03,"accn":"0000807863-19-000080","fy":2019,"fp":"FY","form":"10-K","filed":"2019-12-06"},{"start":"2018-01-01","end":"2018-03-31","val":-0.03,"accn":"0000807863-20-000136","fy":2020,"fp":"FY","form":"10-K","filed":"2020-12-07","frame":"CY2018Q1"},{"start":"2017-10-01","end":"2018-06-30","val":-0.28,"accn":"0000807863-19-000039","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-08-06"},{"start":"2018-04-01","end":"2018-06-30","val":-0.08,"accn":"0000807863-19-000039","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-08-06"},{"start":"2018-04-01","end":"2018-06-30","val":-0.08,"accn":"0000807863-19-000080","fy":2019,"fp":"FY","form":"10-K","filed":"2019-12-06"},{"start":"2018-04-01","end":"2018-06-30","val":-0.08,"accn":"0000807863-20-000136","fy":2020,"fp":"FY","form":"10-K","filed":"2020-12-07","frame":"CY2018Q2"},{"start":"2018-07-01","end":"2018-09-30","val":-0.06,"accn":"0000807863-19-000080","fy":2019,"fp":"FY","form":"10-K","filed":"2019-12-06"},{"start":"2018-07-01","end":"2018-09-30","val":-0.06,"accn":"0000807863-20-000136","fy":2020,"fp":"FY","form":"10-K","filed":"2020-12-07","frame":"CY2018Q3"},{"start":"2018-10-01","end":"2018-12-31","val":-0.08,"accn":"0000807863-19-000010","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-02-08","frame":"CY2018Q4"},{"start":"2018-10-01","end":"2019-03-31","val":-0.1,"accn":"0000807863-19-000030","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-05-07"},{"start":"2019-01-01","end":"2019-03-31","val":-0.02,"accn":"0000807863-19-000030","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-05-07","frame":"CY2019Q1"},{"start":"2018-10-01","end":"2019-06-30","val":-0.1,"accn":"0000807863-19-000039","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-08-06"},{"start":"2019-04-01","end":"2019-06-30","val":0,"accn":"0000807863-19-000039","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-08-06","frame":"CY2019Q2"}]}}