Concentrations and Risks (Details Textual) $ in Thousands	12 Months Ended
Dec. 31, 2018 USD ($) Customer Manufacturers MU	Dec. 31, 2017 USD ($) Manufacturers MU
Retail Business [Member] \| Raw Material Suppliers One [Member]
Concentrations and Risks (Textual)
Concentration risk, percentage	24.00%	11.70%
Number of raw material suppliers	4	6
Retail Business [Member] \| Raw Material Supplier Two [Member]
Concentrations and Risks (Textual)
Concentration risk, percentage	18.20%	12.00%
Number of raw material suppliers	4	6
Retail Business [Member] \| Raw Material Supplier Three [Member]
Concentrations and Risks (Textual)
Concentration risk, percentage	15.10%	13.30%
Number of raw material suppliers	4	6
Retail Business [Member] \| Raw Material Suppliers Four [Member]
Concentrations and Risks (Textual)
Concentration risk, percentage	13.90%	13.90%
Number of raw material suppliers	4	6
Retail Business [Member] \| Raw Material Suppliers Five [Member]
Concentrations and Risks (Textual)
Concentration risk, percentage		15.70%
Number of raw material suppliers		6
Retail Business [Member] \| Raw Material Suppliers Six [Member]
Concentrations and Risks (Textual)
Concentration risk, percentage		17.10%
Number of raw material suppliers		6
Finished Goods [Member] \| Retail Business [Member]
Concentrations and Risks (Textual)
Concentration risk, percentage	10.00%	10.00%
Finished Goods [Member] \| Wholesale Business [Member] \| Manufacturer One [Member]
Concentrations and Risks (Textual)
Concentration risk, percentage	18.10%	24.00%
Number of manufacturers \| Manufacturers	1	1
Raw Materials [Member] \| Wholesale Business [Member]
Concentrations and Risks (Textual)
Concentration risk, percentage	10.00%	10.00%
Sales Revenue, Net [Member]
Concentrations and Risks (Textual)
Concentration risk, percentage	20.90%	13.50%
Number of customer	1	1
Accounts Receivable [Member]
Concentrations and Risks (Textual)
Allowance for doubtful accounts \| $	$ 5,900	$ 5,500

Concentrations and Risks.

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- Definition

Number of customer that hold major part of company's revenue.

+ References

No definition available.

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- Definition

Number of manufacturers that supply major part of finished goods.

+ References

No definition available.

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- Definition

Raw material suppliers.

+ References

No definition available.

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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://fasb.org/us-gaap/role/ref/legacyRef
-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://fasb.org/us-gaap/role/ref/legacyRef
-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

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
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