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Revenue Recognition - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Revenue	$ 17,683	$ 12,136
Deposits revenue
Disaggregation of Revenue [Line Items]
Revenue	11,870	7,101
Identity verification revenue
Disaggregation of Revenue [Line Items]
Revenue	5,813	5,035
Transferred at Point in Time | Deposits software and hardware
Disaggregation of Revenue [Line Items]
Revenue	9,050	5,147
Transferred at Point in Time | Identity verification software and hardware
Disaggregation of Revenue [Line Items]
Revenue	945	2,059
Transferred over Time | Deposits services and other
Disaggregation of Revenue [Line Items]
Revenue	2,820	1,954
Transferred over Time | Identity verification services and other
Disaggregation of Revenue [Line Items]
Revenue	$ 4,868	$ 2,976

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

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