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Critical Accounting Policy (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017
Accounting Policies [Abstract] |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | $ (12,000) | $ (12,000) | $ (36,000) | $ (36,000) |
Postemployment Benefits Liability | 9,020,000 |  | 9,020,000 |  | $ 9,050,000
Self Insurance Reserve | 949,000 |  | 949,000 |  | 862,000
Goodwill, Impairment Loss |  |  | 0 | 0 |
Asset Impairment Charges |  |  | 0 | $ 0 |
Inventory Valuation Reserves | 715,000 |  | 715,000 |  | 624,000
Allowance for Doubtful Accounts Receivable | 18,000 |  | 18,000 |  | 0
Deferred Tax Liabilities, Net | 395,000 |  | 395,000 |  | 395,000
Accounts Receivable, Allowance for Chargebacks | $ 2,163,000 |  | 2,163,000 |  | $ 857,000
Contract with Customer, Liability, Revenue Recognized |  |  | $ 561,000 |  |

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- Definition For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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