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Sale and Leaseback Transaction (Details) - USD ($) | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2006 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2006 | Oct. 24, 2006
Sale and Leaseback Transaction |  |  |  |  |
Purchase price |  |  |  |  | $ 6,200,000
Realized gain on sale | $ 1,051,000 | $ 38,000 | $ 38,000 | $ 300,000 |
Unrecognized gain on sale |  | $ 219,000 | $ 257,000 |  |
Recognized remaining term, description |  | The remaining $751,000 is being recognized ratably over the remaining term of the twenty - year lease at approximately $38,000 per year. |  |  |
Purchaser for the property, description |  | Simultaneous with the closing of the sale of the Bay Shore Property, the Company entered into a 20-year triple- net lease (the "Lease") with the purchaser for the property. Base annual rent is approximately $540,000 for the first five years, $560,000 for the sixth year, and thereafter increases 3% per year. The Lease grants the Company an option to renew the Lease for an additional period of five years. The Company has on deposit with the purchaser of $89,000 as security for the performance of its obligations under the Lease. In addition, at December 31, 2019, the Company had on deposit $150,000 with the landlord as security for the completion of certain repairs and upgrades to the Bay Shore Property. |  |  |

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- Definition Amount of gain (loss) on sale of financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121570589&loc=d3e107425-111719 + Details
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- Definition Amount of gain (loss) on sale and leaseback transaction from transfer of asset accounted for as sale. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 40 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121606570&loc=SL77919786-209982 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=121568110&loc=SL77918982-209971 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980 + Details
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- Definition A description of the transaction and the assets involved in the sale of property to another party and the lease of the property back to the seller. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121606570&loc=SL77919784-209982 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 40 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121606570&loc=SL77919786-209982 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121586228&loc=d3e50796-112755 + Details
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- Definition The historical cost of the asset(s) sold in connection with the sale of the property to another party and the lease of the property back to the seller. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 55 -Paragraph 51 -URI http://asc.fasb.org/extlink&oid=121602674&loc=d3e51840-112757 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=121602674&loc=d3e51843-112757 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 55 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=121602674&loc=d3e51831-112757 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 40 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121606570&loc=SL77919786-209982 + Details
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- Definition A description of the terms of the lease(s) related to the assets being leased-back in connection with the transaction involving the sale of property to another party and the lease of the property back to the seller. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121586228&loc=d3e50796-112755 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 40 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121606570&loc=SL77919786-209982 + Details
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