Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 86,769	$ 32,778
Short-term investments	110	51,106
Other receivables	5,402	5,561
Prepaid expenses	1,558	1,176
Total current assets	93,839	90,621
Property, plant and equipment, net	1,327	519
Intangible assets, net	172	270
Long-term receivables	425	420
Deferred tax assets		1,410
Total assets	95,763	93,240
Current liabilities:
Accounts payable	5,136	2,551
Accrued expense and other current liabilities	8,124	13,326
Total current liabilities	13,260	15,877
Non-current liabilities
Long-term debt	232
Other non-current liabilities	203	107
Total non-current liabilities	435	107
Total liabilities	13,695	15,984
Commitments and contingencies (Note 14)
Stockholders' Equity:
Common shares, no par value, 2,719,695 common shares issued and outstanding at December 31, 2016; None issued and outstanding at December 31, 2017		2,939
Ordinary shares, nominal value $0.01, 1,000,000,000 ordinary shares authorized at December 31, 2017; 36,707,685 issued and outstanding at December 31, 2017	367
Preferred shares, par value $0.01, 100,000,000 shares authorized at December 31, 2017; None issued and outstanding at December 31, 2017
Additional paid in capital	360,872	279,149
Accumulated other comprehensive income	27	10
Accumulated deficit	(279,198)	(204,842)
Total stockholders' equity	82,068	77,256
Total liabilities and stockholders' equity	$ 95,763	$ 93,240