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Basis of Presentation Details (Details) - USD ($) $ in Millions | Jun. 30, 2020 | Oct. 05, 2017 | Oct. 01, 2019 | Sep. 30, 2019
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Entity Information [Line Items] |  |  |  |
Operating Lease, Right-of-Use Asset | $ 3.2 |  | $ 2.7 | $ 0.0
Operating Lease, Liability | $ 3.4 |  | $ 2.9 | $ 0.0
Majority Shareholder [Member] | D.R. Horton, Inc. [Member] |  |  |  |
Entity Information [Line Items] |  |  |  |
Sale of Stock, Percentage of Ownership after Transaction | 65.00% | 75.00% |  |

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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977 + Details
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