4. Short Term Investments (Details) - USD ($)	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Amortized Cost	$ 1,651,792	$ 7,406,084
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(451)	(6,448)
Fair Value	1,651,341	7,399,636
Corporate debt securities
Amortized Cost	1,401,904	6,806,150
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(451)	(6,448)
Fair Value	1,401,453	6,799,702
Commercial paper
Amortized Cost	249,888	599,934
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	$ 249,888	$ 599,934

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=51813488&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
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-Section 50
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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Amount of unrealized gain before deducting unrealized loss on investments in debt and equity securities classified as available-for-sale securities.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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Amount of unrealized loss before deducting unrealized gain on investments in available-for-sale securities.

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