Property and Equipment, Net - Property and Equipment - Additional Information (Detail) - USD ($) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Property, Plant and Equipment [Line Items] | ||
| Depreciation expense | $ 361,382 | $ 307,906 |
| Germany [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Percentage of property and equipment | 86.00% | |
| United States [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Percentage of property and equipment | 14.00% | |
| X | ||||||||||
- Definition Percentage of property and equipment. No definition available.
|
| X | ||||||||||
- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|