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Summary of Significant Accounting Policies - Inventory components (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Accounting Policies [Abstract]
Raw materials and sub-assemblies	$ 930,886us-gaap_InventoryRawMaterials	$ 1,045,356us-gaap_InventoryRawMaterials
Finished goods	26,441us-gaap_InventoryFinishedGoods	59,732us-gaap_InventoryFinishedGoods
Total	$ 957,327us-gaap_InventoryNet	$ 1,105,088us-gaap_InventoryNet

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- Definition

Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.6(a)(1))

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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://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.6(a))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



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-Name Accounting Standards Codification

-Topic 330

-SubTopic 10

-Section 35

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-URI http://asc.fasb.org/extlink&oid=51655945&loc=d3e3927-108312



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-Name Accounting Standards Codification

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.6(a)(4))

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