EQUITY INCENTIVE PLAN (Summary of Stock Option Activity) (Details) - Employee Stock Option	3 Months Ended
	Mar. 31, 2018 $ / shares shares
Number of Options
Outstanding at beginning of period (in shares) | shares	236,484
Granted (in shares) | shares	3,286,528
Forfeited (in shares) | shares	(2,953)
Outstanding at end of period (in shares) | shares	3,520,059
Exercisable at end of period (in shares) | shares	42,249
Weighted-Average Exercise Price
Outstanding at beginning of period (in dollars per share) | $ / shares	$ 7.12
Granted (in dollars per share) | $ / shares	0.71
Forfeited (in dollars per share) | $ / shares	110.23
Outstanding at end of period (in dollars per share) | $ / shares	1.06
Exercisable at end of period (in dollars per share) | $ / shares	$ 22.75