CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 16,284	$ 25,737
Research and development incentive receivable	836	1,744
Prepaid expenses and other current assets	202	177
Total current assets	17,322	27,658
Property and equipment, net	86	135
Deferred tax assets	124	158
Other assets	1,542	1,111
Total assets	19,074	29,062
Current liabilities:
Accounts payable	3,579	2,622
Accrued expenses	2,872	3,461
Total current liabilities	6,451	6,083
Non current liabilities:
Warrant liability	3,448	11,862
Total liabilities	9,899	17,945
Commitments and contingencies (Note 13)
Stockholders' equity:
Common stock, $0.001 par value; 100,000,000 shares authorized as of December 31, 2018 and 2017, 14,703,159 and 12,354,014 shares issued and outstanding as of December 31, 2018 and 2017, respectively	15	12
Additional paid-in capital	162,393	141,770
Accumulated other comprehensive income (loss)	302	(268)
Accumulated deficit	(153,535)	(130,397)
Total stockholders' equity	9,175	11,117
Total liabilities and stockholders' equity	$ 19,074	$ 29,062