Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash	$ 398	$ 171
Accounts receivable, net	902	844
Inventory, net	1,322	1,184
Prepaid expenses and other current assets	338	135
Total current assets	2,960	2,334
Non-current inventory, net	390	372
Property and equipment, net	348	384
Intangible assets, net	933	949
Operating right-of-use assets	835	868
Deposits and other assets	35	39
Total assets	5,501	4,946
Current liabilities:
Accounts payable	635	508
Accrued liabilities	505	404
Operating lease liabilities, current	196	179
Advances	250	250
Related party note payable	3,225	2,943
Total current liabilities	4,811	4,284
Operating lease liabilities, net of current portion	896	950
Total liabilities	5,707	5,234
Commitments and contingencies (Note 8)
Stockholders' deficit:
Common stock, $0.001 par value; 120,000,000 shares authorized; 8,004,389 shares issued and outstanding at March 31, 2022 and December 31, 2021, respectively	8	8
Additional paid-in capital	105,504	105,413
Accumulated deficit	(110,023)	(110,014)
Total stockholders' deficit	(4,506)	(4,588)
Total liabilities, redeemable convertible preferred stock and stockholders' deficit	5,501	4,946
Series D Redeemable Convertible Preferred Stock [Member]
Current liabilities:
Series D redeemable convertible preferred stock, $0.001 par value; 50 shares authorized; 43 shares issued and outstanding; liquidation preference of $4,300 at March 31, 2022 and December 31, 2021, respectively	4,300	4,300
Nonredeemable Convertible Preferred Stock [Member]
Stockholders' deficit:
Non-redeemable convertible preferred stock, $0.001 par value; 10,004,310 shares authorized; 5,254,310 shares issued and outstanding; liquidation preference of $9,770 and $9,766 at March 31, 2022 and December 31, 2021, respectively	$ 5	$ 5