Quarterly report pursuant to Section 13 or 15(d)

Notes Payable (Details Narrative)

v3.19.1
Notes Payable (Details Narrative) - USD ($)
 3 Months Ended
Sep. 25, 2018
Mar. 31, 2019
Dec. 31, 2018
Debt Instrument [Line Items]      
Unamortized discount   $ 1,325,181  
Other offering expenses   100,000  
12% Junior Secured Notes Payable 2014 [Member]      
Debt Instrument [Line Items]      
Debt face amount   1,975,000 $ 1,975,000
Unamortized discount   $ 20,331 23,719
Private Placement [Member] | 12% Junior Secured Notes Payable 2014 [Member]      
Debt Instrument [Line Items]      
Debt frequency of periodic payment   Semi-annually  
Private Placement [Member] | 12% Junior Secured Notes Payable 2014 [Member] | Placement Agents [Member]      
Debt Instrument [Line Items]      
Unamortized discount   $ 9,798 11,430
Brainlab Senior Secured Note Payable [Member]      
Debt Instrument [Line Items]      
Stated interest rate 5.50%    
Maturity date Dec. 31, 2018    
2010 Junior Secured Notes Payable [Member]      
Debt Instrument [Line Items]      
Stated interest rate   3.50%  
Debt face amount   $ 3,000,000 3,000,000
Maturity date   Nov. 30, 2020  
Description of collateral terms   Collateralized by a first-priority security interest in all the Company’s assets  
Unamortized discount   $ 1,295,052 1,459,209
2010 Junior Secured Notes Payable [Member] | Private Placement [Member]      
Debt Instrument [Line Items]      
Description of collateral terms   Collateralized by a security interest in all the Company’s assets, which security interest is junior and subordinate to the security interest that collateralizes the 2014 Secured Notes.  
Description of payment terms   Interest on the 2010 Secured Notes will be due and payable in a single payment upon maturity  
2010 Junior Secured Notes Payable [Member] | Chairman and Officer [Member]      
Debt Instrument [Line Items]      
Debt face amount   $ 197,000 $ 197,000
Maturity date   Sep. 30, 2020