Stock Based Compensation -Valuation Assumptions Non-Employees (Details) - USD ($)
|
11 Months Ended |
12 Months Ended |
Dec. 31, 2014 |
Dec. 31, 2016 |
Dec. 31, 2015 |
| Stock Option Plans |
|
|
|
| Stock-based compensation expense |
|
$ 3,828,000
|
$ 428,000
|
| Weighted-average assumptions used to estimate fair value of share-based awards |
|
|
|
| Expected term (in years) |
6 years 1 month 6 days
|
6 years
|
6 years 1 month 6 days
|
| Expected dividend yield |
0.00%
|
0.00%
|
0.00%
|
| Non-employee stock options |
|
|
|
| Stock Option Plans |
|
|
|
| Stock-based compensation expense |
|
$ 142,500
|
$ 42,848
|
| Weighted-average assumptions used to estimate fair value of share-based awards |
|
|
|
| Risk-free interest rate, minimum |
|
1.90%
|
1.80%
|
| Risk-free interest rate, maximum |
|
1.94%
|
2.20%
|
| Expected Volatility, minimum |
|
92.10%
|
82.00%
|
| Expected Volatility, maximum |
|
92.70%
|
84.70%
|
| Expected dividend yield |
|
0.00%
|
0.00%
|
| Non-employee stock options | Minimum |
|
|
|
| Weighted-average assumptions used to estimate fair value of share-based awards |
|
|
|
| Expected term (in years) |
|
8 years 1 month 6 days
|
9 years 1 month 6 days
|
| Non-employee stock options | Maximum |
|
|
|
| Weighted-average assumptions used to estimate fair value of share-based awards |
|
|
|
| Expected term (in years) |
|
8 years 7 months 6 days
|
10 years
|