CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash	$ 1,422	$ 2,448
Accounts receivable, net	1,258	918
Inventories, net	1,593	1,516
Prepaid expenses and other current assets	450	729
Total current assets	4,723	5,611
Non-current assets:
Property and equipment, net	531	543
Right-of-use asset, net	1,200	1,623
Other assets	71	71
Total non-current assets	1,802	2,237
Total assets	6,525	7,848
Current liabilities:
Accounts payable and accrued expenses	2,525	2,516
Derivative liability	4,444	4,144
Lease liabilities	456	426
Notes payable	1,400	0
Dividends payable	1,650	0
Deferred revenue	268	91
Total current liabilities	10,743	7,177
Non-current liabilities:
Notes payable, net of current portion	1,016	0
Lease liabilities, net of current portion	762	1,218
Total non-current liabilities	1,778	1,218
Total liabilities	12,521	8,395
Commitments and contingencies (see Note 14)
Stockholders' equity (deficit):
Common stock ($0.001 par value); 50 billion shares authorized; 18,991 million shares and 18,974 million shares issued and outstanding as of December 31, 2020 and 2019, respectively	18,991	18,974
Additional paid-in capital	(15,324)	(17,045)
Accumulated deficit	(9,663)	(2,476)
Total stockholders' deficit	(5,996)	(547)
Total liabilities and stockholders' equity (deficit)	6,525	7,848
Series A Preferred Stock
Stockholders' equity (deficit):
Preferred stock	0	0
Series B Preferred Stock
Stockholders' equity (deficit):
Preferred stock	$ 0	$ 0