CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 10,292	$ 14,456
Restricted cash	779	779
Trade accounts receivable, net of allowance of $186 and $118	4,929	4,733
Inventories, net	7,582	6,158
Prepaid expenses and other current assets	538	413
Total current assets	24,120	26,539
Property and equipment, net	6,240	6,449
Brand name and trademark	1,510	1,510
Purchased technology and license rights, net	217	215
Goodwill	185	185
Deposits	66	109
Other assets	218	103
Total assets	32,556	35,110
Current liabilities:
Accounts payable	2,077	1,606
Accrued payroll	416	419
Accrued vacation	375	404
Current portion of mortgage note payable	239	239
Accrued and other liabilities	2,511	2,604
Total current liabilities	5,618	5,272
Mortgage note payable, net of current portion	2,575	2,694
Note payable	140	140
Deferred rents	11	14
Deferred tax liability	564	564
Derivative liabilities	77	203
Total liabilities	8,985	8,887
STOCKHOLDERS' EQUITY
Series B convertible preferred stock, $0.001 par value; 3,588,139 authorized and 975,639 issued and outstanding as of June 30, 2017 and December 31, 2016	1	1
Common stock, $0.001 par value; 40,000,000 shares authorized; 31,002,832 issued and 30,859,753 outstanding as of June 30, 2017 and December 31, 2016	31	31
Additional paid-in capital	49,966	49,625
Accumulated deficit	(26,427)	(23,434)
Total stockholders' equity	23,571	26,223
Total liabilities and stockholders' equity	$ 32,556	$ 35,110