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Financing Receivables (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Sep. 30, 2017
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Accounts Notes And Loans Receivable [Line Items] |  |
Total financing receivables | $ 11,179 | $ 12,887
Total unearned income | (332) | (617)
Total financing receivables, net of unearned income | 10,847 | 12,270
Allowance for doubtful notes | (1,849) | (1,020)
Less current portion | (4,258) | (3,055)
Non-current financing receivables | 4,740 | 8,195
Promissory Notes |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total financing receivables | 5,646 | 4,306
Total unearned income | (95) | (90)
Sales Type Lease |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total financing receivables | 5,533 | 8,581
Total unearned income | $ (237) | $ (527)

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- Definition An amount representing an agreement for an unconditional promise by the maker to pay the Company (holder) a definite sum of money within one year from the balance sheet date (or the normal operating cycle, whichever is longer), net of any write-downs taken for collection uncertainty on the part of the holder. Such amount may include accrued interest receivable in accordance with the terms of the debt. The debt also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. This amount does not include amounts related to receivables held-for-sale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4531-111522 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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