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Contingent Liabilities and Commitments (Details Narrative) | 1 Months Ended |  |  |
--- | --- | --- | --- | ---
Jan. 31, 2018 USD ($) ft² | Apr. 30, 2017 USD ($) ft² | Apr. 30, 2012 USD ($) | Jul. 31, 2011 ft² | Jun. 30, 2018 USD ($) | Dec. 31, 2017 USD ($) | Jun. 30, 2014 ft²
Irrevocable and unconditional standby letter of credit |  |  |  |  | $ 908,556 | $ 665,373 |
Standby Letter of Credit [Member] |  |  |  |  |  |  |
Contractual obligation reduction nineteen months from initial term |  |  | $ 50,000 |  |  |  |
Contractual obligation remaining |  |  | 100,000 |  |  |  |
Lawrenceville New Jersey [Member] |  |  |  |  |  |  |
Area of premises | ft² |  | 7,565 |  | 10,870 |  |  |
Lease term |  | 64 months |  | 66 months |  |  |
The number of months in which free rent is provided |  | 4 months |  | 6 months |  |  |
Payment for rent |  |  | 23,000 |  |  |  |
Operating leases, monthly rent payment in first year |  | $ 18,900 |  |  |  |  |
Operating leases, monthly rent payment in final year |  | $ 20,500 |  |  |  |  |
Lawrenceville New Jersey [Member] | Standby Letter of Credit [Member] |  |  |  |  |  |  |
Irrevocable and unconditional standby letter of credit |  |  | $ 250,000 |  |  |  |
Huntsville Alabama [Member] | EGEN Asset Purchase Agreement [Member] |  |  |  |  |  |  |
Area of premises | ft² | 9,049 |  |  |  |  |  | 11,500
Lease term | 60 months |  |  |  |  |  |
Operating leases, monthly rent payment | $ 18,100 |  |  |  |  |  |

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