Equity (Details Textual) (USD $)
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1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 0 Months Ended | 6 Months Ended | 1 Months Ended | 6 Months Ended | 1 Months Ended | 6 Months Ended | 1 Months Ended | 6 Months Ended | |||||||||||||||||||
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Mar. 24, 2014
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Jun. 30, 2014
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Apr. 28, 2014
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Jun. 30, 2013
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Jun. 30, 2014
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Jun. 30, 2013
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Dec. 31, 2013
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Jun. 30, 2014
Stock Option Plan [Member]
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Jun. 30, 2014
Stock Option Plan [Member]
Minimum [Member]
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Jun. 30, 2014
Stock Option Plan [Member]
Maximum [Member]
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Jun. 30, 2014
Employees, consultants and board members [Member]
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Dec. 31, 2013
Employees, consultants and board members [Member]
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Jun. 30, 2014
Employees, consultants and board members [Member]
Minimum [Member]
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Jun. 30, 2014
Employees, consultants and board members [Member]
Maximum [Member]
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Jun. 30, 2014
Investor [Member]
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Jan. 10, 2014
Placement agent [Member]
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Jun. 30, 2014
Placement agent [Member]
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Jan. 31, 2014
Private Placement [Member]
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Jan. 31, 2014
Warrant [Member]
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Jun. 30, 2014
Warrant [Member]
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Jun. 30, 2013
Warrant [Member]
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Jan. 31, 2014
Common Stock [Member]
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Jun. 30, 2014
Common Stock [Member]
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Jan. 31, 2014
Common Stock [Member]
Placement agent [Member]
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Jan. 31, 2014
Common Stock [Member]
Laidlaw and Co [Member]
Placement agent [Member]
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Jun. 30, 2014
Public Offering [Member]
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Equity (Textual) | ||||||||||||||||||||||||||||||||||
Fair value of warrants determined utilizing the Black-Scholes option pricing model | $ 600,000 | $ 200,000 | $ 200,000 | |||||||||||||||||||||||||||||||
Exercise price of warrants | $ 5.55 | $ 11.66 | $ 6.00 | $ 6.00 | ||||||||||||||||||||||||||||||
Fair value assumptions, risk free interest rate | 1.19% | [1] | 1.27% | [1] | 1.64% | |||||||||||||||||||||||||||||
Fair value assumptions, expected volatility rate | 73.00% | [2] | 73.00% | [2] | 87.06% | 87.76% | 88.00% | |||||||||||||||||||||||||||
Fair value assumptions, expected term | 3 years 6 months | 6 months | 6 years | 10 years | 5 years | |||||||||||||||||||||||||||||
Fair value assumptions, expected dividend rate | [3] | [3] | 0.00% | 0.00% | ||||||||||||||||||||||||||||||
Fair value assumptions, expected discount rate | 1.88% | 2.07% | ||||||||||||||||||||||||||||||||
Warrants issued to purchase common stock, shares | 137,952 | 68,976 | 68,976 | |||||||||||||||||||||||||||||||
Number of stock option granted | 100,000 | 979,100 | 200,000 | 312,500 | ||||||||||||||||||||||||||||||
Number of additional stock option granted | 445,167 | |||||||||||||||||||||||||||||||||
Number of stock option cancelled | 50,000 | |||||||||||||||||||||||||||||||||
Description restricted stock |
Of the total shares of restricted stock, 20,000 shares vest 3 months from the grant date, 22,500 shares vest 1 year from the grant date, 199,167 shares have a vesting period of 4 years and 200,000 shares vest at date of grant. The remaining restricted shares granted are performance based and vest over time. |
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Share-based compensation term | 10 years | |||||||||||||||||||||||||||||||||
Share-based Compensation vesting period | 4 years | |||||||||||||||||||||||||||||||||
Fair value of stock option | 7,100,000 | |||||||||||||||||||||||||||||||||
Stock option exercise prices | $ 0.78 | $ 5.55 | $ 11.95 | |||||||||||||||||||||||||||||||
Proceeds from the exercise of options | 5,220 | 2,873,557 | ||||||||||||||||||||||||||||||||
Number of option exercised | 11,655 | |||||||||||||||||||||||||||||||||
Expense related to common stock granted | 607,791 | 94,200 | 889,195 | 188,400 | 98,224 | 0 | ||||||||||||||||||||||||||||
Unrecognized compensation expense | 10,165,000 | 10,165,000 | ||||||||||||||||||||||||||||||||
Net proceeds from the public offering | 6,636,720 | 11,451,250 | ||||||||||||||||||||||||||||||||
Price per share | $ 9.00 | $ 6.00 | $ 7.50 | |||||||||||||||||||||||||||||||
Common stock, par value | $ 0.001 | $ 0.001 | $ 0.001 | $ 0.01 | ||||||||||||||||||||||||||||||
Common stock issued, shares | 500 | 551,810 | 573,299 | 1,670,000 | ||||||||||||||||||||||||||||||
Proceeds from common stock issued | 96,868 | 12,525,000 | ||||||||||||||||||||||||||||||||
Underwriting discount | 876,750 | |||||||||||||||||||||||||||||||||
Underwriting agreement description | Under the terms of the underwriting agreement entered into with Canaccord Genuity Inc. as representative (the "Representative") of the several underwriters (collectively, the "Underwriters"), the Company also granted the Underwriters a 30-day option to purchase up to an additional 250,000 shares of common stock to cover over-allotments, if any, at the offering price. | |||||||||||||||||||||||||||||||||
Proceeds from issuance of warrants | 3,300,000 | |||||||||||||||||||||||||||||||||
Placement agent cash fees | 395,000 | |||||||||||||||||||||||||||||||||
Placement agent attorney fees | 40,000 | |||||||||||||||||||||||||||||||||
Warrants granted | 137,952 | |||||||||||||||||||||||||||||||||
Warrants exercised by warrant holders | 662,160 | |||||||||||||||||||||||||||||||||
Registration statement description | This Registration Statement contained two prospectuses: (i) a base prospectus which covers the offering, issuance and sale by the Company of up to $200,000,000 of its common stock, preferred stock, warrants and/or units; and (ii) a sales agreement prospectus covering the offering, issuance and sale by us of up to a maximum aggregate offering price of $75,000,000 of its common stock that may be issued and sold under a sales agreement (the "Sales Agreement") with MLV & Co. LLC ("MLV") dated March 24, 2014. | |||||||||||||||||||||||||||||||||
Maximum offering price | 75,000,000 | |||||||||||||||||||||||||||||||||
Aggregate offering amount of securities sold to investors | The Company will pay MLV in cash, upon the sale of common stock pursuant to the Sales Agreement, an amount equal to 3.0% of the gross proceeds from the sale of common stock. On April 28, 2014 the Company issued 500 shares and received net proceeds of $6,000 under the Sales Agreement with MLV. | Aggregate offering amount of securities sold to investors was increased from $6,000,000 to $6,636,720 in order to cover over-allotments | ||||||||||||||||||||||||||||||||
Other offering expenses | 125,000 | |||||||||||||||||||||||||||||||||
Auditor fees | $ 72,000 | |||||||||||||||||||||||||||||||||
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