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EQUITY INCENTIVE PLAN (Summary of Stock Option Activity) (Details) - Stock Options [Member]
 12 Months Ended
Dec. 31, 2017
$ / shares
shares
Number of Options  
Outstanding at beginning of period (in shares) | shares 24,600
Granted (in shares) | shares 232,332
Forfeited (in shares) | shares (20,448)
Outstanding at end of period (in shares) | shares 236,484
Exercisable at end of period (in shares) | shares 13,161
Weighted-Average Exercise Price  
Outstanding at beginning of period (in dollars per share) | $ / shares $ 107.83
Granted (in dollars per share) | $ / shares 1.85
Forfeited (in dollars per share) | $ / shares 68.39
Outstanding at end of period (in dollars per share) | $ / shares 7.12
Exercisable at end of period (in dollars per share) | $ / shares $ 93.27