Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 78,101	$ 102,003
Restricted cash	228
Short-term investments	175	225
Accounts receivable, net and other receivables	6,540	3,871
Contract asset		1,500
Inventory	162
Prepaid expenses	1,202	1,154
Total current assets	86,408	108,753
Property, plant and equipment, net	2,655	1,139
Intangible assets, net	343	98
Long-term receivables	716	428
Total assets	90,122	110,418
Current liabilities:
Accounts payable	3,221	3,304
Accrued expense and other current liabilities	11,663	14,502
Total current liabilities	14,884	17,806
Non-current liabilities
Long-term debt	34,241	23,718
Other non-current liabilities	1,782	264
Total non-current liabilities	36,023	23,982
Total liabilities	50,907	41,788
Commitments and contingencies (Note 12)
Stockholders’ Equity:
Ordinary shares, nominal value $0.01, 1,000,000,000 ordinary shares authorized at September 30, 2019; 67,019,094 and 77,994,207 issued and outstanding at December 31, 2018 and September 30, 2019, respectively	780	670
Preferred shares, par value $0.01, 100,000,000 shares authorized at September 30, 2019; None issued and outstanding
Additional paid in capital	492,105	461,911
Accumulated other comprehensive income	27	27
Accumulated deficit	(453,697)	(393,978)
Total stockholders’ equity	39,215	68,630
Total liabilities and stockholders’ equity	$ 90,122	$ 110,418