Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 41,359	$ 86,019
Restricted cash	231	392
Short-term investments	16	175
Accounts receivable, net and other receivables	3,909	2,744
Inventory	5,823	682
Prepaid expenses	5,880	1,158
Total current assets	57,218	91,170
Property, plant and equipment, net	768	2,474
Intangible assets, net	80	91
Long-term receivables	370	378
Total assets	58,436	94,113
Current liabilities:
Current portion of long-term debt	2,041
Accounts payable	2,889	4,673
Accrued expense and other current liabilities	12,844	11,966
Deferred revenue	750
Total current liabilities	18,524	16,639
Non-current liabilities
Long-term debt	5,686	34,502
Other non-current liabilities	1,091	1,698
Total non-current liabilities	6,777	36,200
Total liabilities	25,301	52,839
Commitments and contingencies (Note 17)
Stockholders' Equity:
Ordinary shares, nominal value $0.01, 100,000,000 ordinary shares authorized at December 31, 2020; 9,454,511 and 21,078,781 issued and outstanding at December 31, 2019 and December 31, 2020, respectively	211	95
Preferred shares, par value $0.01, 10,000,000 shares authorized at December 31, 2020; None issued and outstanding
Additional paid in capital	579,123	517,894
Accumulated other comprehensive income	27	27
Accumulated deficit	(546,226)	(476,742)
Total stockholders' equity	33,135	41,274
Total liabilities and stockholders' equity	$ 58,436	$ 94,113