SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Schedule of Redeemable Convertible Preferred Stock

A roll forward of the balance of Series A Redeemable Preferred Stock for the year ended December 31, 2018 is as follows (in thousands):

Balance at December 31, 2017	$	—
Issuance of redeemable preferred stock, less issuance costs	22,000
Less issuance costs, net of accretion	(253		)
Balance at December 31, 2018	$	21,747

A roll forward of the balance of Series B Redeemable Convertible Preferred Stock for the years ended December 31, 2018 and 2017 is as follows (in thousands):

Balance at December 31, 2016	$	32,143
Deemed dividend on redeemable convertible preferred stock	2,716
Balance at December 31, 2017	34,859
Issuance of redeemable convertible preferred stock, less issuance costs and warrant	7,311
Deemed dividend on redeemable convertible preferred stock	3,493
Balance at December 31, 2018	$	45,663