Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 47,659	$ 41,359
Restricted cash	175	231
Short-term investments	16	16
Accounts receivable, net and other receivables	12,751	3,909
Inventory	14,509	5,823
Prepaid expenses	5,155	5,880
Total current assets	80,265	57,218
Property, plant and equipment, net	233	768
Intangible assets, net	31	80
Other non-current assets	380	370
Total assets	80,909	58,436
Current liabilities:
Current portion of long-term debt	3,765	2,041
Accounts payable	4,372	2,889
Accrued expense and other current liabilities	13,829	12,844
Deferred revenue	374	750
Total current liabilities	22,340	18,524
Non-current liabilities:
Long-term debt	4,265	5,686
Other non-current liabilities	954	1,091
Total non-current liabilities	5,219	6,777
Total liabilities	27,559	25,301
Commitments and contingencies (Note 15)
Stockholders' equity:
Ordinary shares, nominal value $0.01, 100,000,000 ordinary shares authorized at December 31, 2021; 56,715,306 and 21,078,781 issued and outstanding at December 31, 2021 and December 31, 2020, respectively	567	211
Preferred shares, nominal value $0.01, 100,000,000 shares authorized at December 31, 2021; None issued and outstanding
Additional paid in capital	648,432	579,123
Accumulated other comprehensive income	27	27
Accumulated deficit	(595,676)	(546,226)
Total stockholders' equity	53,350	33,135
Total liabilities and stockholders' equity	$ 80,909	$ 58,436