CONDENSED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash	$ 2,674	$ 11,826
Investment in securities held to maturity	2,950
Accounts receivable	9	10
Prepaid expenses	192	337
Inventory	300	57
Deposits	226	9
Total current assets	6,351	12,239
Property and equipment, net	1,656	631
Total assets	8,007	12,870
Current liabilities:
Short-term debt	160	45
Accounts payable	419	351
Accrued contract cancellation settlement		1,000
Accrued expenses	1,026	371
Notes payable, related parties	20	30
Total current liabilities	1,625	1,797
Notes payable, related parties		6
Long-term debt, net	642	138
Common stock warrant liability	33	69
Deferred rent	46	33
Total liabilities	2,346	2,043
Commitments and contingencies ( See note 15)
Stockholders' equity:
Common stock, $0.001 par value, 100,000,000 shares authorized, 10,320,254 and 10,157,292 shares issued and outstanding at June 30, 2017 and December 31, 2016, respectively	10	10
Additional paid-in capital	73,971	72,069
Stock subscribed, but not issued, consisting of 4,750 and 4,750 shares at June 30, 2017 and December 31, 2016, respectively	29	59
Accumulated deficit	(68,349)	(61,311)
Total stockholders' equity	5,661	10,827
Total liabilities and stockholders' equity	$ 8,007	$ 12,870