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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash

-URI http://asc.fasb.org/extlink&oid=6506951

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash Equivalents

-URI http://asc.fasb.org/extlink&oid=6507016

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- Definition

Fair value as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as a liability.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624163-113959

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- Definition

Fair value of asset after deduction of liability.

+ References

No definition available.

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- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Available-for-Sale Securities

-URI http://asc.fasb.org/extlink&oid=6505594

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Trading Securities

-URI http://asc.fasb.org/extlink&oid=6526789

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 25

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Subparagraph a, f, g

-Article 7

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 35

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=27723805&loc=d3e24584-111560

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- Definition

Fair value of financial and nonfinancial obligations.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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Fair Value Measurements (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Sep. 16, 2013
Marketable securities:
Marketable securities, fair value	$ 10,900,722us-gaap_InvestmentsFairValueDisclosure	$ 8,073,108us-gaap_InvestmentsFairValueDisclosure
Derivative instruments, fair value	137,171	159,134	170,337
Corporate debt and government securities
Marketable securities:
Marketable securities, fair value	10,900,722	8,073,108
Recurring
Cash equivalents:
Total cash equivalents	2,049,972	8,486,633
Marketable securities:
Marketable securities, fair value	10,900,722	8,073,108
Derivative instruments, fair value	137,171	159,134
Total derivative liabilities measured at fair value	137,171	159,134
Total assets and liabilities measured at fair value	13,087,865	16,718,875
Recurring \| Corporate debt and government securities
Marketable securities:
Marketable securities, fair value	10,900,722	8,073,108
Recurring \| Money market funds
Cash equivalents:
Total cash equivalents	2,049,972
Recurring \| Money market funds and commercial paper
Cash equivalents:
Total cash equivalents		8,486,633
Recurring \| Fair Value, Inputs, Level 1
Cash equivalents:
Total cash equivalents	2,049,972	8,486,633
Marketable securities:
Marketable securities, fair value	0	0
Derivative instruments, fair value	0	0
Total derivative liabilities measured at fair value	0	0
Total assets and liabilities measured at fair value	2,049,972	8,486,633
Recurring \| Fair Value, Inputs, Level 1 \| Corporate debt and government securities
Marketable securities:
Marketable securities, fair value	0	0
Recurring \| Fair Value, Inputs, Level 1 \| Money market funds
Cash equivalents:
Total cash equivalents	2,049,972
Recurring \| Fair Value, Inputs, Level 1 \| Money market funds and commercial paper
Cash equivalents:
Total cash equivalents		8,486,633
Recurring \| Fair Value, Inputs, Level 2
Cash equivalents:
Total cash equivalents	0	0
Marketable securities:
Marketable securities, fair value	10,900,722	8,073,108
Derivative instruments, fair value	0	0
Total derivative liabilities measured at fair value	0	0
Total assets and liabilities measured at fair value	10,900,722	8,073,108
Recurring \| Fair Value, Inputs, Level 2 \| Corporate debt and government securities
Marketable securities:
Marketable securities, fair value	10,900,722	8,073,108
Recurring \| Fair Value, Inputs, Level 2 \| Money market funds
Cash equivalents:
Total cash equivalents	0
Recurring \| Fair Value, Inputs, Level 2 \| Money market funds and commercial paper
Cash equivalents:
Total cash equivalents		0
Recurring \| Fair Value, Inputs, Level 3
Cash equivalents:
Total cash equivalents	0	0
Marketable securities:
Marketable securities, fair value	0	0
Derivative instruments, fair value	137,171	159,134
Total derivative liabilities measured at fair value	137,171	159,134
Total assets and liabilities measured at fair value	137,171	159,134
Recurring \| Fair Value, Inputs, Level 3 \| Corporate debt and government securities
Marketable securities:
Marketable securities, fair value	0	0
Recurring \| Fair Value, Inputs, Level 3 \| Money market funds
Cash equivalents:
Total cash equivalents	0
Recurring \| Fair Value, Inputs, Level 3 \| Money market funds and commercial paper
Cash equivalents:
Total cash equivalents		$ 0