Quarterly report pursuant to Section 13 or 15(d)

Notes Payable (Details Narrative)

v3.7.0.1
Notes Payable (Details Narrative) - USD ($)
 1 Months Ended 6 Months Ended 12 Months Ended
Apr. 04, 2017
Mar. 31, 2014
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2015
Dec. 31, 2016
Debt Instrument [Line Items]            
Proceeds from common stock called     $ 13,250,000    
Unamortized discount     $ 2,236,278      
Common stock par value (in dollars per share)     $ 0.01     $ 0.01
12% Junior Secured Notes Payable 2014 [Member] | Private Placement (Securities Purchase Agreements) [Member]            
Debt Instrument [Line Items]            
Debt face amount   $ 3,725,000        
Maturity period   5 years        
Debt frequency of periodic payment  

Semi-annually

        
Description of collateral terms  

The 2014 Secured Notes are collateralized by a security interest in the Company’s property and assets, which security interest is junior and subordinate to the security interest that collateralizes the New Brainlab note.

        
Unamortized discount     $ 94,877     $ 121,985
12% Junior Secured Notes Payable 2014 [Member] | Private Placement (Securities Purchase Agreements) [Member] | Non-Employee Directors [Member]            
Debt Instrument [Line Items]            
Debt face amount   $ 1,100,000        
Other offering expenses     45,725     $ 58,789
12% Junior Secured Notes Payable 2014 [Member] | Private Placement (Securities Purchase Agreements) [Member] | Placement Agents [Member]            
Debt Instrument [Line Items]            
Fair value   30,210        
Placement agents cash commission   145,500        
Other offering expenses   $ 76,186        
12% Junior Secured Notes Payable 2014 [Member] | Private Placement (Securities Purchase Agreements) [Member] | Warrant [Member]            
Debt Instrument [Line Items]            
Number of each common stock called   0.01        
Proceeds from common stock called   $ 3,725,000        
Warrant exercise price (in dollars per share)   $ 70.00        
Fair value   $ 413,057        
12% Junior Secured Notes Payable 2014 [Member] | Private Placement (Securities Purchase Agreements) [Member] | Warrant [Member] | Maximum [Member]            
Debt Instrument [Line Items]            
Number of common stock called   27,937        
12% Junior Secured Notes Payable 2014 [Member] | Private Placement (Securities Purchase Agreements) [Member] | Warrant [Member] | Placement Agents [Member]            
Debt Instrument [Line Items]            
Number of warrants issued to placement agent   1,818        
Brainlab Senior Secured Note Payable [Member]            
Debt Instrument [Line Items]            
Stated interest rate         5.50%  
Debt face amount         $ 5,000,000  
Maturity date         Apr. 30, 2016  
Accrued interest         $ 740,000  
Brainlab Senior Secured Note Payable [Member] | Securities Purchase Agreement (the "2016 PIPE Purchase Agreement") [Member]            
Debt Instrument [Line Items]            
Accrued interest     740,000      
Debt cancelled principal amount     $ 1,300,000      
Number of units issued     99,310      
Gain on foregoing of debt     $ 941,000      
Brainlab Senior Secured Note Payable [Member] | 2016 Securities Purchase Agreement (Patent And Technology License Agreement) [Member]            
Debt Instrument [Line Items]            
Debt cancelled principal amount     $ 1,000,000      
Brainlab Senior Secured Note Payable [Member] | 2016 Securities Purchase Agreement (Patent And Technology License Agreement) [Member] | 2016 Series A Warrants [Member]            
Debt Instrument [Line Items]            
Warrant exercise price (in dollars per share)     $ 16.23      
Number of common shares issued     0.4      
Brainlab Senior Secured Note Payable [Member] | 2016 Securities Purchase Agreement (Patent And Technology License Agreement) [Member] | 2016 Series B Warrants [Member]            
Debt Instrument [Line Items]            
Warrant exercise price (in dollars per share)     $ 21.10      
Number of common shares issued     0.3      
Brainlab Senior Secured Note Payable [Member] | 2016 Securities Purchase Agreement (Patent And Technology License Agreement) [Member] | Common Stock [Member]            
Debt Instrument [Line Items]            
Number of common shares issued     1      
New Brainlab Note (amended and restated secured note) [Member] | Securities Purchase Agreement (the "2016 PIPE Purchase Agreement") [Member]            
Debt Instrument [Line Items]            
Debt face amount $ 2,000,000          
Maturity date Dec. 31, 2018          
Description of collateral terms

Note is collateralized by a senior security interest in the assets of the Company.