UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jul. 01, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 22,815	$ 16,527
Accounts receivable, net of allowances for doubtful accounts of $0 and $0	2,191	925
Inventories	4,290	3,559
Other current assets	1,099	997
Total current assets	30,395	22,008
Property and equipment, net	1,790	2,375
Other assets	246	253
TOTAL ASSETS	32,431	24,636
Current liabilities:
Revolving line of credit	6,000	6,000
Trade payables	1,700	1,437
Accrued liabilities	1,828	1,653
Current portion of capital lease obligations	303	299
Total current liabilities	9,831	9,389
Long-term liabilities:
Capital lease obligations, less current portion	115	355
Other long-term liabilities	61	14
Total liabilities	10,007	9,758
Commitments and contingencies (see Note 12)
Stockholders' equity:
Preferred stock, $0.001 par value; 10,000 shares authorized; no shares issued and outstanding	0	0
Common stock, $0.001 par value; 200,000 authorized; 94,575 and 80,536 shares issued and outstanding as of July 1, 2018 and December 31, 2017, respectively	95	80
Additional paid-in capital	283,819	268,833
Accumulated deficit	(261,490)	(254,035)
Total stockholders' equity	22,424	14,878
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 32,431	$ 24,636