Condensed consolidated balance sheets - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents (Note 3)	$ 22,470	$ 39,526
Short-term investments (Note 8)	44,089	34,956
Receivables, prepayments and deposits	1,090	314
Total current assets	67,649	74,796
Property and equipment, net	387	89
Long-term investments (Note 8)	32,664	38,458
Total assets	100,700	113,343
Current liabilities
Accounts payable and other liabilities	8,497	4,792
Total current liabilities	8,497	4,792
Other liabilities (Note 4)	114	131
Total liabilities	8,611	4,923
Share capital: (Note 5)
Common stock	0	0
Additional paid-in capital	220,905	219,986
Accumulated deficit	(128,888)	(111,276)
Accumulated other comprehensive income (loss)	72	(290)
Total stockholders' equity	92,089	108,420
Total liabilities and stockholders' equity	$ 100,700	$ 113,343