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Business Combination - Additional Information (Detail) - USD ($) $ in Thousands |  |  |  | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
May 23, 2018 | May 03, 2018 | Oct. 16, 2017 | Jun. 30, 2018 | Jun. 30, 2018 | Jun. 30, 2017 | Apr. 30, 2018 | Sep. 30, 2017
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Acquisition, net of cash acquired |  |  |  |  | $ 29,744 | $ 0 |  |
Acquisition-related contingent consideration |  |  |  | $ 2,361 | 2,361 |  |  | $ 354
Revenue from business combinations, actual |  |  |  | 2,100 | 4,600 |  |  |
Net loss from business combinations, actual |  |  |  | 2,700 | 3,700 |  |  |
A2iA Group II, S.A.S. |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Acquisition, net of cash acquired | $ 26,800 |  |  |  |  |  |  |
Stock issued as consideration | 2,514,588 |  |  |  |  |  |  |
Common stock issued during acquisition, value |  | $ 21,900 |  |  |  |  |  |
Acquisition consideration, incurred liabilities | $ 200 |  |  |  |  |  |  |
Business acquisition, transaction costs | 2,000 |  |  |  |  |  |  |
Payments of cash for collateral | $ 700 |  |  |  |  |  |  |
Payments for collateral, equity, shares | 508,479 |  |  |  |  |  |  |
Payments for collateral, equity, value | $ 4,400 |  |  |  |  |  |  |
ICAR Vision Systems, S.L. |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Acquisition, net of cash acquired |  |  | $ 3,000 |  |  |  |  |
Stock issued as consideration |  |  | 584,291 |  |  |  |  |
Common stock issued during acquisition, value |  |  | $ 5,600 |  |  |  |  |
Business acquisition, transaction costs |  |  | 500 |  |  |  |  |
Acquisition-related contingent consideration |  |  | 2,900 |  |  |  |  |
Contingent consideration, change in amount of contingent consideration liability |  |  |  | $ 300 | $ 1,000 |  |  |
Escrow deposit |  |  | 1,500 |  |  |  | $ 1,500 |
ICAR Vision Systems, S.L. | Contingent Consideration, Fourth Quarter Consideration |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Contingent consideration arrangement, range of outcomes, high |  |  | 1,500 |  |  |  |  |
ICAR Vision Systems, S.L. | Contingent Consideration, Earnout Consideration |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Contingent consideration arrangement, range of outcomes, high |  |  | $ 3,800 |  |  |  |  |

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- Definition Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition. + References No definition available. + Details
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- Definition Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
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- Definition Amount of liability recognized arising from contingent consideration in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 35 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6911338&loc=d3e6819-128478 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476 + Details
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- Definition This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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