Condensed consolidated balance sheets - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents (Note 3)	$ 27,147	$ 32,301
Short-term investments (Note 8)	104,130	70,758
Receivables, prepayments and deposits	915	426
Total current assets	132,192	103,485
Property and equipment, net	1,092	849
Long-term investments (Note 8)		50,046
Total assets	133,284	154,380
Current liabilities
Accounts payable and other liabilities	8,128	9,519
Total current liabilities	8,128	9,519
Other liabilities (Note 4)	548	197
Total liabilities	8,676	9,716
Share capital: (Note 5)
Common stock	0	0
Additional paid-in capital	295,214	293,111
Accumulated deficit	(170,401)	(148,278)
Accumulated other comprehensive loss	(205)	(169)
Total stockholders' equity	124,608	144,664
Total liabilities and stockholders' equity	$ 133,284	$ 154,380