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Subsequent Event - Textual (Details) - Subsequent Event [Member] $ / shares in Units, $ in Millions |  |  | 12 Months Ended
--- | --- | --- | ---
Oct. 31, 2018 USD ($) Condominium | Oct. 26, 2018 USD ($) $ / shares shares | Dec. 29, 2018 USD ($)
Subsequent Event [Line Items] |  |  |
Condominium sale price | $ 1.0 |  |
Scenario Forecast [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Gain on the sale of the asset, net of certain fees and commissions |  |  | $ 0.9
Milpitas [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Number of condominiums units sold | Condominium | 1 |  |
Number of condominiums units | Condominium | 2 |  |
4D [Member] | Stock Purchase Agreement [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Acquire paid in cash |  | $ 36.0 |
4D [Member] | Stock Purchase Agreement [Member] | Common Stock [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Acquire share | shares |  | 125,117 |
Acquire share price | $ / shares |  | $ 0.001 |
Acquire share value |  | $ 4.0 |
4D [Member] | Stock Purchase Agreement and related Escrow Agreement [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Acquire paid in cash |  | $ 4.0 |
4D [Member] | Stock Purchase Agreement and related Escrow Agreement [Member] | Common Stock [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Acquire share | shares |  | 125,117 |

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- Definition Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4582445-111684 + Details
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