Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 26,938	$ 86,019
Restricted cash	444	392
Short-term investments	175	175
Accounts receivable, net and other receivables	3,467	2,744
Inventory	4,224	682
Prepaid expenses	2,925	1,158
Total current assets	38,173	91,170
Property, plant and equipment, net	2,340	2,474
Intangible assets, net	111	91
Long-term receivables	378	378
Total assets	41,002	94,113
Current liabilities:
Accounts payable	2,033	4,673
Accrued expense and other current liabilities	9,929	11,966
Total current liabilities	11,962	16,639
Non-current liabilities
Long-term debt	7,374	34,502
Other non-current liabilities	1,752	1,698
Total non-current liabilities	9,126	36,200
Total liabilities	21,088	52,839
Commitments and contingencies (Note 12)
Stockholders’ Equity:
Ordinary shares, nominal value $0.01, 1,000,000,000 ordinary shares authorized at March 31, 2020; 94,545,116 and 95,109,047 issued and outstanding at December 31, 2019 and March 31, 2020, respectively	951	945
Preferred shares, par value $0.01, 100,000,000 shares authorized at March 31, 2020; None issued and outstanding
Additional paid in capital	518,937	517,044
Accumulated other comprehensive income	27	27
Accumulated deficit	(500,001)	(476,742)
Total stockholders’ equity	19,914	41,274
Total liabilities and stockholders’ equity	$ 41,002	$ 94,113