CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 29,408	$ 34,905
Investments	2,457	10,656
Trade accounts receivable, net	2,427	2,416
Inventory	5,270	5,194
Prepaid expenses	1,697	818
Other current assets	1,575	2,025
Total current assets	42,834	56,014
Property and equipment, net	3,216	3,478
Finance lease assets, net	2,161	2,422
Operating lease right of use assets, net	1,696	1,859
Other non-current assets	1,095	1,242
Total assets	51,002	65,015
Current liabilities:
Accounts payable	3,524	4,501
Accrued liabilities	4,836	2,682
Accrued interest	707	472
Deferred revenue	468	547
Current portion of convertible notes	56,595	56,413
Finance lease, current	1,113	1,113
Operating lease, current	882	829
Total current liabilities	68,125	66,557
Finance lease, non-current	705	782
Operating lease, non-current	1,308	1,545
Other non-current liabilities	1,055	874
Accrued interest related-party	1,104	663
Long-term debt related-party	17,430	16,858
Total liabilities	89,727	87,279
Commitments and contingencies (see Note 14)
Stockholders’ deficit:
Preferred shares, $0.001 par value; 5,000,000 preferred shares authorized and 3,954,546 outstanding as of March 31, 2023 and December 31, 2022	4	4
Common stock, $0.001 par value; 200,000,000 common shares authorized with 97,240,983 shares issued and outstanding on March 31, 2023 and 100,000,000 common shares authorized with 67,649,018 shares issued and outstanding on December 31, 2022	100	97
Contributed capital	630,903	630,341
Treasury stock	(45,067)	(45,067)
Accumulated deficit	(624,034)	(607,239)
Accumulated other comprehensive loss	(631)	(400)
Total stockholders’ deficit	(38,725)	(22,264)
Total liabilities and stockholders’ deficit	$ 51,002	$ 65,015