BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash	$ 4,920	$ 2,101
Investment in securities		5,023
Accounts receivable	139	16
Prepaid expenses	342	170
Inventory	1,261	540
Deposits	9	19
Total current assets	6,671	7,869
Property and equipment, net	1,083	1,454
Total assets	7,754	9,323
Current liabilities:
Short-term debt	219	177
Accounts payable	173	391
Accrued expenses	771	589
Notes payable, related parties		12
Total current liabilities	1,163	1,169
Long-term debt, net	261	591
Deferred rent	16	41
Total liabilities	1,440	1,801
Commitments and contingencies (See note 15)
Stockholders' equity:
Common stock, $0.001 par value, 100,000,000 shares authorized, 23,471,999 and 16,404,195 shares issued and outstanding at December 31, 2018 and December 31, 2017, respectively	24	16
Additional paid-in capital	92,128	81,103
Accumulated deficit	(85,838)	(73,597)
Total stockholders' equity	6,314	7,522
Total liabilities and stockholders' equity	$ 7,754	$ 9,323