STOCK BASED COMPENSATION - Summary of Restricted Stock Units (RSUs) Activity (Details)
|
12 Months Ended |
|
Dec. 31, 2016
USD ($)
$ / shares
shares
|
|---|
| Shares vested |
|
| Total fair value of shares vested | $ |
$ 7.37
|
| Restricted Stock Award |
|
| Restricted stock awards |
|
| Balance at beginning of year (in shares) |
75,718
|
| Settled (in shares) |
(32,453)
|
| Balance at end of year (in shares) |
43,265
|
| Unvested remaining from the early exercise of stock options (in shares) |
39,247
|
| Weighted-average purchase price per share |
|
| Balance at beginning of year (in dollars per share) | $ / shares |
$ 5.73
|
| Settled (in dollars per share) | $ / shares |
5.73
|
| Balance at end of year (in dollars per share) | $ / shares |
$ 5.73
|
| Unrecognized compensation cost |
|
| Unrecognized stock-based compensation expense | $ |
$ 233,000
|
| Period over which unrecognized compensation cost is expected to be recognized as expense |
1 year 2 months 12 days
|
| Shares vested |
|
| Total fair value of shares vested | $ |
$ 186,000
|
| Restricted Stock Units (RSUs) |
|
| Restricted stock awards |
|
| Granted (in shares) |
41,741
|
| Balance at end of year (in shares) |
41,741
|
| Weighted-average purchase price per share |
|
| Granted (in dollars per share) | $ / shares |
$ 16.15
|
| Balance at end of year (in dollars per share) | $ / shares |
$ 16.15
|
| Unrecognized compensation cost |
|
| Unrecognized stock-based compensation expense | $ |
$ 509,000
|
| Period over which unrecognized compensation cost is expected to be recognized as expense |
3 years
|