Annual report pursuant to Section 13 and 15(d)

Notes Payable (Details Narrative)

v3.8.0.1
Notes Payable (Details Narrative) - USD ($)
1 Months Ended 12 Months Ended
Apr. 04, 2017
Mar. 31, 2014
Dec. 31, 2017
Dec. 31, 2015
Dec. 31, 2016
Debt Instrument [Line Items]          
Unamortized discount     $ 2,024,228    
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 all of the Company’s assets, which security interest is junior and subordinate to the security interest that collateralizes the New Brainlab note.

     
Unamortized discount     67,770   $ 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     32,660   $ 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] | Common Stock [Member]          
Debt Instrument [Line Items]          
Number of common shares issued     1    
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    
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 all of the assets of the Company.