Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 34,234	$ 31,807
Trade and other receivables, net	12,127	6,955
Inventories, net	2,839	2,461
Prepaid expenses and other current assets	1,798	3,402
Total current assets	50,998	44,625
Property and equipment, net	5,791	6,873
Right-of-use assets, net	3,102	3,448
Intangible assets, net	76	102
Other non-current assets	6,908	7,836
Total assets	66,875	62,884
Current liabilities:
Accounts payable	8,100	7,089
Accrued expenses	6,583	8,569
Lease liabilities, current	823	728
Deferred revenue, current	642	693
Liability related to the sale of future revenue, current	1,737	1,450
Loans payable, current	5,150	2,575
Total current liabilities	23,035	21,104
Loans payable, net	34,070	34,329
Liability related to the sale of future revenue, net	53,003	47,524
Lease liabilities	2,415	2,846
Deferred revenue	6,351	3,633
Other non-current liabilities	1,770	1,945
Total liabilities	120,644	111,381
Contingencies (Note 19)
Stockholders’ deficit:
Common stock, $0.001 par value. Authorized 250,000,000 shares; 38,568,242 and 34,569,254 shares issued and outstanding at June 30, 2021 and December 31, 2020, respectively	39	35
Additional paid-in capital	159,488	137,725
Accumulated deficit	(213,296)	(186,257)
Total stockholders’ deficit	(53,769)	(48,497)
Total liabilities and stockholders’ deficit	$ 66,875	$ 62,884