Stock Plans, Share-Based Payments and Warrants - Summary of Restricted Stock Activity (Details) - $ / shares |
12 Months Ended | |
|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Class of Warrant or Right [Line Items] | ||
| Shares, Granted | 2,311,542 | 510,520 |
| Weighted Average Grant Date Fair Value, Granted | $ 0.36 | $ 0.31 |
| Restricted Stock [Member] | ||
| Class of Warrant or Right [Line Items] | ||
| Shares, Nonvested Beginning Balance | 957,336 | 501,182 |
| Shares, Granted | 817,144 | 1,047,109 |
| Shares, Vested | (975,093) | (590,955) |
| Shares, Nonvested Ending Balance | 799,387 | 957,336 |
| Weighted Average Grant Date Fair Value, Nonvested Beginning Balance | $ 0.35 | $ 0.46 |
| Weighted Average Grant Date Fair Value, Granted | 0.50 | 0.35 |
| Weighted Average Grant Date Fair Value, Vested | 0.35 | 0.46 |
| Weighted Average Grant Date Fair Value, Nonvested Ending Balance | $ 0.50 | $ 0.35 |