CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash	$ 6,500	$ 7,478
Milestone receivable	7,000	0
Refundable tax credits receivable, current portion	970	0
Other current assets	70	94
Total current assets	14,540	7,572
Refundable tax credits receivable, net of current portion	970	1,940
Total assets	15,510	9,512
Current liabilities:
Accounts payable	439	225
Accrued expenses and other current liabilities	78	143
Total current liabilities	517	368
Commitments and contingencies
Stockholders' equity:
Preferred stock - $0.01 par value, authorized 3,000,000 shares; no shares issued and outstanding at December 31, 2018 and 2017	0	0
Common stock - $0.01 par value, authorized 170,000,000 shares; issued and outstanding 44,214,603 shares at December 31, 2018 and 2017	442	442
Additional paid-in capital	83,649	83,649
Accumulated deficit	(69,098)	(74,947)
Total stockholders' equity	14,993	9,144
Total liabilities and stockholders' equity	$ 15,510	$ 9,512