Condensed consolidated balance sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents (Note 3)	$ 47,105	$ 32,301
Short-term investments (Note 8)	72,590	70,758
Receivables, prepayments and deposits	878	426
Total current assets	120,573	103,485
Property and equipment, net	1,029	849
Long-term investments (Note 8)		50,046
Total assets	121,602	154,380
Current liabilities
Accounts payable and other liabilities	6,997	9,519
Total current liabilities	6,997	9,519
Other liabilities (Note 4)	513	197
Total liabilities	7,510	9,716
Share capital: (Note 5)
Common stock	0	0
Additional paid-in capital	296,429	293,111
Accumulated deficit	(182,234)	(148,278)
Accumulated other comprehensive loss	(103)	(169)
Total stockholders' equity	114,092	144,664
Total liabilities and stockholders' equity	$ 121,602	$ 154,380