Equity Incentive Plan - Compensation Expense (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Compensation expense | $ 904 | $ 1,563 |
| General and Administrative Expense [Member] | ||
| Compensation expense | 836 | 1,524 |
| Selling and Marketing Expense [Member] | ||
| Compensation expense | $ 68 | $ 39 |