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Stock Based Compensation (Details Textual) - USD ($)			12 Months Ended
	Apr. 04, 2013	Dec. 31, 2011	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock-Based Compensation (Textual)
Share-based compensation expense			$ 1,075,000	$ 1,729,000	$ 2,656,000
Weighted average grant date fair value			$ 1.24	$ 3.14
Options granted to purchase of common stock to employee			90,000	10,000
Options granted to purchase of common stock to board members			515,000	395,200	145,000
Stock based compensation options granted to purchase of common stock to employee fair value			$ 800,000	$ 1,300,000	$ 748,000
Stock options vesting period description					The options have a 7-year life and 1/3 of the options are vested on the one year anniversary date of grant with the remaining to vest monthly over the next 24-months.
Estimated fair value of the warrants	$ 166,000
Number of Options Outstanding				1,709,400
Stock Options [Member]
Stock-Based Compensation (Textual)
Share-based compensation expense			$ 1,100,000	$ 1,700,000	$ 2,700,000
Weighted average grant date fair value			$ 4.63
Vesting period			1 year 7 months 6 days
Number of Options Outstanding			2,184,117	1,709,400	1,600,583	1,715,200
Number of Shares, Options Granted			605,000	405,200	145,000
Two thousand fifteen Plan [Member] | Stock Options [Member]
Stock-Based Compensation (Textual)
Number of Shares, Options Granted			605,000
Aggregate shares of common stock, shares			2,100,000
Warrant [Member]
Stock-Based Compensation (Textual)
Share-based compensation expense					$ 26,000
Vesting period		24 months	1 year 7 months 6 days
Common stock issuable upon exercise of warrants		20,000		10,053	1,384,719
Exercise price of warrants per share		$ 3.90
Estimated fair value of the warrants		$ 75,000
Number of Options Outstanding		5,405,606	464,073	3,335,073	828,573	4,704,636
Number of Shares, Options Granted				2,575,000

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Stock-Based compensation.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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Amount of expense (income) related to adjustment to fair value of warrant liability.

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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