NATURE OF BUSINESS (Details) $ / shares in Units, $ in Thousands |
1 Months Ended | |||||
|---|---|---|---|---|---|---|
|
Oct. 31, 2016
USD ($)
$ / shares
shares
|
Jan. 31, 2016
USD ($)
$ / shares
shares
|
May 31, 2015
USD ($)
$ / shares
shares
|
Apr. 30, 2015 |
Dec. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
|
| Common stock split ratio | 0.1449 | |||||
| Accumulated deficit | ||||||
| Accumulated deficit | $ | $ 223,184 | $ 129,008 | ||||
| Initial public offering | ||||||
| Stock Issued During Period, Shares, New Issues | 5,750,000 | 2,750,000 | 6,670,000 | |||
| Issue price (in dollars per share) | $ / shares | $ 16.00 | $ 20.00 | $ 12.00 | |||
| Net proceeds from IPO | $ | $ 86,166 | $ 51,174 | $ 72,029 | |||
| Conversion into common stock | 12,591,463 | |||||
| Underwriters over-allotment option | ||||||
| Stock Issued During Period, Shares, New Issues | 870,000 | |||||