Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 61,140	$ 41,359
Restricted cash	180	231
Short-term investments	16	16
Accounts receivable, net and other receivables	11,576	3,909
Inventory	10,113	5,823
Prepaid expenses	11,595	5,880
Total current assets	94,620	57,218
Property, plant and equipment, net	355	768
Intangible assets, net	54	80
Other non-current assets	380	370
Total assets	95,409	58,436
Current liabilities:
Current portion of long-term debt	1,823	2,041
Accounts payable	1,582	2,889
Accrued expense and other current liabilities	15,243	12,844
Deferred revenue	563	750
Total current liabilities	19,211	18,524
Non-current liabilities
Long-term debt	6,046	5,686
Other non-current liabilities	951	1,091
Total non-current liabilities	6,997	6,777
Total liabilities	26,208	25,301
Commitments and contingencies (Note 12)
Stockholders' Equity:
Ordinary shares, nominal value $0.01, 100,000,000 ordinary shares authorized at June 30, 2021; 21,078,781 and 49,737,552 issued and outstanding at December 31, 2020 and June 30, 2021, respectively	497	211
Preferred shares, nominal value $0.01, 100,000,000 shares authorized at June 30, 2021; None issued and outstanding
Additional paid in capital	640,638	579,123
Accumulated other comprehensive income	27	27
Accumulated deficit	(571,961)	(546,226)
Total stockholders' equity	69,201	33,135
Total liabilities and stockholders' equity	$ 95,409	$ 58,436