Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 28,024	$ 31,807
Trade and other receivables, net	12,120	6,955
Inventories, net	4,038	2,461
Prepaid expenses and other current assets	3,077	3,402
Total current assets	47,259	44,625
Property and equipment, net	5,055	6,873
Right-of-use assets, net	2,725	3,448
Intangible assets, net	51	102
Other non-current assets	6,903	7,836
Total assets	61,993	62,884
Current liabilities:
Accounts payable	8,314	7,089
Accrued expenses	8,736	8,569
Lease liabilities, current	899	728
Deferred revenue	765	693
Liability related to the sale of future revenue, current	1,225	1,450
Loans payable, current	2,025	2,575
Total current liabilities	21,964	21,104
Loans payable, net	51,551	34,329
Liability related to the sale of future revenue, net	59,059	47,524
Lease liabilities	1,946	2,846
Deferred revenue, net of current portion	7,122	3,633
Other non-current liabilities	2,485	1,945
Total liabilities	144,127	111,381
Contingencies (note 20)
Stockholders’ deficit:
Common stock, $0.001 par value. Authorized 250,000,000 shares; 41,228,736 and 34,569,254 shares issued and outstanding at December 31, 2021 and December 31, 2020, respectively	41	35
Additional paid-in capital	174,621	137,725
Accumulated deficit	(256,796)	(186,257)
Total stockholders’ deficit	(82,134)	(48,497)
Total liabilities and stockholders’ deficit	$ 61,993	$ 62,884