CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash	$ 8,090	$ 3,495
Restricted cash		388
Accounts receivable	2,098	1,692
Accounts receivable - pledged	2,434
Other receivable	28	2
Inventory	2,782	2,129
Operating lease - right-of-use asset		553
Prepaid expenses and other current assets	2,360	1,263
Total current assets	17,792	9,522
Property and equipment, net	677	710
Intangible assets, net	24,337	26,024
Other assets	37	154
Total assets	42,843	36,410
Current liabilities:
Accounts payable	4,759	5,352
Accrued liabilities	4,493	2,922
Warrant liability	179	3
Operating lease liability		337
Notes payable, net of discount, current	3,789	6,778
Total current liabilities	13,220	15,392
Notes payable, net of current portion	12,421	450
Total liabilities	25,641	15,842
Commitments and contingencies (See Note 5)
Stockholders' equity
Additional paid-in capital	184,090	142,046
Accumulated deficit	(166,899)	(133,090)
Total stockholders' equity	17,202	10,673
Total liabilities, convertible preferred stock and stockholders' equity	42,843	36,410
Series A
Current liabilities:
Temporary equity value		9,895
Series B convertible preferred stock
Current liabilities:
Temporary equity value		476
Stockholders' equity
Preferred stock value		476
Series B-2 convertible preferred stock
Current liabilities:
Temporary equity value		1,236
Stockholders' equity
Preferred stock value		1,236
Common stock - voting
Stockholders' equity
Common stock value	11	1
Total stockholders' equity	$ 11	1
Common stock - non-voting
Stockholders' equity
Common stock value		4
Total stockholders' equity		$ 4