Quarterly report pursuant to Section 13 or 15(d)

Equity (Details Textual)

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Equity (Details Textual) (USD $)
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
Mar. 24, 2014
Jun. 30, 2014
Apr. 28, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2013
Jun. 30, 2014
Stock Option Plan [Member]
Jun. 30, 2014
Stock Option Plan [Member]
Minimum [Member]
Jun. 30, 2014
Stock Option Plan [Member]
Maximum [Member]
Jun. 30, 2014
Employees, consultants and board members [Member]
Dec. 31, 2013
Employees, consultants and board members [Member]
Jun. 30, 2014
Employees, consultants and board members [Member]
Minimum [Member]
Jun. 30, 2014
Employees, consultants and board members [Member]
Maximum [Member]
Jun. 30, 2014
Investor [Member]
Jan. 10, 2014
Placement agent [Member]
Jun. 30, 2014
Placement agent [Member]
Jan. 31, 2014
Private Placement [Member]
Jan. 31, 2014
Warrant [Member]
Jun. 30, 2014
Warrant [Member]
Jun. 30, 2013
Warrant [Member]
Jan. 31, 2014
Common Stock [Member]
Jun. 30, 2014
Common Stock [Member]
Jan. 31, 2014
Common Stock [Member]
Placement agent [Member]
Jan. 31, 2014
Common Stock [Member]
Laidlaw and Co [Member]
Placement agent [Member]
Jun. 30, 2014
Public Offering [Member]
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.

                             
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
[1] The risk-free interest rate was determined by management using the Treasury Bill as of the respective measurement date.
[2] Because the Company does not have adequate trading history to determine its historical trading volatility, the volatility factor was estimated by management using the historical volatilities of comparable companies in the same industry and region.
[3] Management determined the dividend yield to be 0% based upon its expectation that it will not pay dividends for the foreseeable future.