CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash	$ 3,015	$ 3,495
Restricted cash		388
Accounts receivable	2,212	1,692
Accounts receivable - pledged	1,738
Other receivable	5	2
Inventory	2,354	2,129
Operating lease - right-of-use asset	188	553
Prepaid expenses and other current assets	2,094	1,263
Total current assets	11,606	9,522
Property and equipment, net	697	710
Intangible assets, net	25,181	26,024
Other assets	96	154
Total assets	37,580	36,410
Current liabilities:
Accounts payable	5,240	5,352
Deferred revenue	1,500
Accrued liabilities	4,856	2,922
Warrant liability	4,086	3
Operating lease liability	116	337
Notes payable, net of discount	8,960	6,778
Total current liabilities	24,758	15,392
Notes payable long term	400	450
Total liabilities	25,158	15,842
Commitments and contingencies (See Note 6)
Stockholders' equity
Additional paid-in capital	150,885	142,046
Accumulated deficit	(150,264)	(133,090)
Total stockholders' equity	1,544	10,673
Total liabilities, convertible preferred stock and stockholders' equity	37,580	36,410
Series A
Current liabilities:
Series A redeemable convertible preferred stock: $0.0001 par value, 5,524,926 shares authorized at June 30, 2020 and December 31, 2019; 5,524,926 shares issued and outstanding at June 30, 2020 and December 31, 2019; (redemption amount of $12,738,822 at June 30, 2020 and December 31, 2019; liquidation preference of $9,199,002 at June 30, 2020 and December 31, 2019)	10,878	9,895
Series B convertible preferred stock
Stockholders' equity
Preferred stock value		476
Total stockholders' equity		476
Series B-2 convertible preferred stock
Stockholders' equity
Preferred stock value	916	1,236
Total stockholders' equity	916	1,236
Common stock - voting
Stockholders' equity
Common stock value	3	1
Common stock - non-voting
Stockholders' equity
Common stock value	$ 4	$ 4