Quarterly report pursuant to Section 13 or 15(d)

Notes Payable (Details Narrative)

v3.8.0.1
Notes Payable (Details Narrative) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2018
Dec. 31, 2017
Debt Instrument [Line Items]    
Unamortized discount $ 1,920,459  
12% Junior Secured Notes Payable 2014 [Member]    
Debt Instrument [Line Items]    
Stated interest rate 12.00% 12.00%
Debt face amount $ 1,975,000 $ 1,975,000
Maturity date Mar. 25, 2019 Mar. 25, 2019
12% Junior Secured Notes Payable 2014 [Member] | Private Placement (Securities Purchase Agreements) [Member]    
Debt Instrument [Line Items]    
Debt frequency of periodic payment

Semi-annually

 
Description of collateral terms

The 2014 Secured Notes are 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 Brainlab Note.

 
Unamortized discount $ 54,216 $ 67,770
12% Junior Secured Notes Payable 2014 [Member] | Private Placement (Securities Purchase Agreements) [Member] | Placement Agents [Member]    
Debt Instrument [Line Items]    
Placement agents cash commission 145,500  
Other offering expenses $ 26,128 $ 32,660
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  
Brainlab Senior Secured Note Payable [Member]    
Debt Instrument [Line Items]    
Stated interest rate 5.50% 5.50%
Debt face amount $ 2,000,000 $ 2,000,000
Maturity date Dec. 31, 2018 Dec. 31, 2018
New Brainlab Note (amended and restated secured note) [Member] | Securities Purchase Agreement (the "2016 PIPE Purchase Agreement") [Member]    
Debt Instrument [Line Items]    
Description of collateral terms

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

 
2010 Junior Secured Notes Payable [Member]    
Debt Instrument [Line Items]    
Stated interest rate 3.50% 3.50%
Debt face amount $ 3,000,000 $ 3,000,000
2010 Junior Secured Notes Payable [Member] | Chairman and Officer [Member]    
Debt Instrument [Line Items]    
Debt face amount $ 197,000 197,000
2010 Junior Secured Notes Payable [Member] | Private Placement (Securities Purchase Agreements) [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 Brainlab Note and the 2014 Secured Notes

 
Unamortized discount $ 1,840,115 $ 1,956,458
Interest expense terms

10-year term of the notes using the effective interest method.

 
Description of payment terms

Interest on the 2010 Secured Notes will be due and payable in a single payment upon maturity.