Notes Payable (Details Narrative) - USD ($) |
6 Months Ended | 12 Months Ended | |
|---|---|---|---|
Jun. 30, 2018 |
Dec. 31, 2017 |
Sep. 30, 2018 |
|
| Debt Instrument [Line Items] | |||
| Unamortized discount | $ 1,647,601 | ||
| 12% Junior Secured Notes Payable 2014 [Member] | |||
| Debt Instrument [Line Items] | |||
| 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 | <p><font style="font: 10pt Times New Roman, Times, Serif">Semi-annually</font></p> | ||
| Description of collateral terms | <p style="text-indent: 0.25in"><font style="font: 10pt Times New Roman, Times, Serif">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.</font></p> | ||
| Unamortized discount | $ 67,770 | $ 27,108 | |
| 12% Junior Secured Notes Payable 2014 [Member] | Placement Agents [Member] | Private Placement (Securities Purchase Agreements) [Member] | |||
| Debt Instrument [Line Items] | |||
| Placement agents cash commission | $ 145,500 | ||
| Other offering expenses | 32,660 | 13,064 | |
| 2010 Junior Secured Notes Payable [Member] | |||
| Debt Instrument [Line Items] | |||
| 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 | <p><font style="font: 10pt Times New Roman, Times, Serif">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</font></p> | ||
| Unamortized discount | 1,956,458 | $ 1,607,429 | |
| Interest expense terms | <p><font style="font: 10pt Times New Roman, Times, Serif">10-year term of the notes using the effective interest method.</font></p> | ||
| Description of payment terms | <p><font style="font: 10pt Times New Roman, Times, Serif">Interest on the 2010 Secured Notes will be due and payable in a single payment upon maturity.</font></p> | ||
| 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 | <p style="margin-top: 0pt; margin-bottom: 0pt"><font style="font: 10pt Times New Roman, Times, Serif">Note is collateralized by a senior security interest in all the assets of the Company.</font></p> | ||
| Brainlab Senior Secured Note Payable [Member] | |||
| Debt Instrument [Line Items] | |||
| Debt face amount | $ 2,000,000 | $ 2,000,000 | |
| Maturity date | Dec. 31, 2018 | Dec. 31, 2018 | |
| Warrant [Member] | 12% Junior Secured Notes Payable 2014 [Member] | Private Placement (Securities Purchase Agreements) [Member] | |||
| Debt Instrument [Line Items] | |||
| Number of each common stock called | 0.01 |