EQUITY (Tables)

9 Months Ended

Sep. 30, 2017

EQUITY

Summary of Changes in Shareholders' Equity

				Additional				Total
	Common Stock			Paid- In		Accumulated		Shareholders’
	Shares		Amount	Capital		Deficit		Equity (Deficit)
Balance, December 31, 2016	29,364,100	$	29	$	358,063	$	(223,184)	$	134,908
Exercise of common stock options	131,755		1		427		—		428
Issuance for employee stock purchase plan	110,841		—		1,141		—		1,141
Vesting of restricted stock units	14,757		—		—		—		—
Shares withheld for employee taxes upon vesting of restricted stock units	(4,819)		—		(68)		—		(68)
Issuance of common stock resulting from at-the-market transactions, net of issuance costs of $507	1,148,466		1		11,454		—		11,455
Stock-based compensation	—		—		5,867		—		5,867
Net loss	—		—		—		(57,462)		(57,462)
Balance, September 30, 2017	30,765,100	$	31	$	376,884	$	(280,646)	$	96,269