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Acquisition - Additional Information (Details) |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 30, 2017 USD ($) | Nov. 03, 2016 USD ($) $ / Unit | Sep. 30, 2019 USD ($) mi² | Sep. 30, 2018 USD ($) | Dec. 31, 2017 USD ($)
Business Acquisition [Line Items] |  |  |  |  |
Impairment charge of lease intangibles |  |  | $ 3,222,000 | $ 0 |
ApplianceSmart Inc |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business combination, total consideration paid | $ 6,500,000 |  |  |  |
Net liabilities assumed by ASH |  |  |  |  | $ (1,607,000)
Total notes payable |  |  | 2,826,000 | $ 3,822,000 |
ApplianceSmart Inc | Intangible Leases |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Acquired finite-lived intangible asset, residual value | 1,206,000 |  |  |  |
Impairment charge of lease intangibles |  |  | $ 760,000 |  |
Present value discount rate |  |  | 7.50% |  |
Number of mile radius of existing stores | mi² |  |  | 3 |  |
ApplianceSmart Inc | Maximum | Intangible Leases |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Amortization period of intangible asset |  |  | 10 years |  |
Percentage of square footage price difference of contracted lease rate |  |  | 10.00% |  |
Difference in overall discounted cash flow effect of lease |  |  | $ 150,000 |  |
ApplianceSmart Inc | Minimum | Intangible Leases |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Amortization period of intangible asset |  |  | 2 years |  |
ApplianceSmart Inc | Trade Names Intangible Asset |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Acquired finite-lived intangible asset, residual value |  |  | $ 2,015,000 |  |
Impairment charge of lease intangibles |  |  | $ 1,839,000 |  |
Intangible asset method for fair value determination |  |  | residual method |  |
Residual method percentage |  |  | 0.50% |  |
Present value discount rate |  |  | 18.60% |  |
Amortization period of intangible asset |  |  | 20 years |  |
ApplianceSmart Inc | Valuation, Cost Approach | Customer Lists |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Estimated fair value of intangible asset acquired cost per unit of email address | $ / Unit |  | 0.10 |  |  |
Acquired finite-lived intangible asset, residual value |  | $ 5,000 |  |  |
Acquired finite-lived intangible assets, weighted average useful life |  | 20 years |  |  |
Impairment charge of lease intangibles |  |  | $ 4,000 |  |
ApplianceSmart Inc | ASH |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business combination, total consideration paid | 6,500,000 |  |  |  |
Liabilities assumed by ASH | $ 0 |  |  |  |
Interest rate | 5.00% |  |  |  |
Debt instrument payment terms |  |  | three-year |  |
Original amount for the balance of purchase price | $ 3,919,000 |  |  |  |
Percentage of outstanding principal amount repaid | 10.00% |  |  |  |
Maturity date | Apr. 01, 2021 |  |  |  |
Cash paid purchase price | $ 2,581,000 |  |  |  |
Net liabilities assumed by ASH | $ 1,607,000 |  |  |  |

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