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Inventories - Schedule of Inventories (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Jewelry	$ 6,818,262	$ 6,344,948
Scrap gold	1,112,262	1,512,156
Bullion	355,916	414,867
Rare coins and other	314,441	325,719
Total	$ 8,600,881	$ 8,597,690

X

- Definition

Carrying amount (lower of cost or market) as of the balance sheet date of bullion held in inventory.

+ References

No definition available.

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Balance Type:	debit
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X

- Definition

Carrying amount (lower of cost or market) as of the balance sheet date of jewelry held in inventory.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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X

- Definition

Carrying amount (lower of cost or market) as of the balance sheet date of rare coins and collectibles held in inventory.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- References

No definition available.

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- Definition

Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 330
-SubTopic 10
-Section 35
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=68049868&loc=d3e3927-108312

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.6(a))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Gross amount of residue from manufacturing or production process that has recovery value.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.6(a))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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