Consolidated Balance Sheets - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Assets
Cash	$ 484,000	$ 1,075,000
Accounts receivable, net	1,515,000	651,000
Inventory, net	1,246,000	1,501,000
Prepaid expenses and other current assets	207,000	543,000
Total current assets	3,452,000	3,770,000
Non-current inventory	358,000	805,000
Property and equipment, net	668,000	469,000
Intangible assets, net	1,335,000	2,674,000
Right-of-use asset	717,000
Deposits and other assets	90,000	78,000
Total assets	6,620,000	7,796,000
Liabilities, Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit)
Accounts payable	654,000	458,000
Accrued liabilities	642,000	579,000
Operating lease liability, current	367,000
Advances	250,000	250,000
Related party note payable		2,045,000
Fair value of warrant liability		1,745,000
Total current liabilities	1,913,000	5,077,000
Related party note payable	2,370,000
Fair value of warrant liability	207,000
Long-term deferred rent		182,000
Operating lease liability, net of current portion	718,000
Total liabilities	5,208,000	5,259,000
Commitments and contingencies
Stockholders' Equity (Deficit)
Common stock, $0.001 par value, 120,000,000 shares authorized, 7,539,089 and 6,933,861 shares issued and outstanding at December 31, 2019 and 2018, respectively	8,000	7,000
Additional paid-in capital	103,490,000	109,188,000
Accumulated deficit	(106,391,000)	(106,663,000)
Total stockholders' equity (deficit)	(2,888,000)	2,537,000
Total liabilities, redeemable convertible preferred stock and stockholders' equity (deficit)	6,620,000	7,796,000
Series D Redeemable Convertible Preferred Stock [Member]
Liabilities, Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit)
Series D Redeemable Convertible Preferred stock, $0.001 par value, 50 shares authorized, 43 issued and outstanding, with liquidation preference of $4,300 at December 31, 2019	4,300,000
Series B Preferred Stock [Member]
Stockholders' Equity (Deficit)
Convertible Preferred stock
Series D Preferred Stock [Member]
Stockholders' Equity (Deficit)
Convertible Preferred stock
Series G Preferred Stock [Member]
Stockholders' Equity (Deficit)
Convertible Preferred stock	5,000	5,000
Series I-1 Preferred Stock [Member]
Stockholders' Equity (Deficit)
Convertible Preferred stock
Series I-2 Preferred Stock [Member]
Stockholders' Equity (Deficit)
Convertible Preferred stock