Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 30, 2017	[1]
Current assets:
Cash and cash equivalents	$ 16,045	$ 21,707
Accounts receivable, net of allowance for doubtful accounts of $213 as of June 30, 2018 and $226 as of December 30, 2017	7,142	7,863
Inventories	9,093	9,381
Prepaid expenses and other current assets	653	500
Total current assets	32,933	39,451
Property and equipment, net	1,396	1,403
Intangible assets, net	108	116
Goodwill	533	533
Other long-term assets	173	143
Total assets	35,143	41,646
Current liabilities:
Accounts payable	2,243	1,724
Accrued compensation	2,392	2,459
Accrued expenses	2,322	2,153
Accrued warranty	762	1,536
Deferred revenue	2,316	2,520
Total current liabilities	10,035	10,392
Long-term liabilities:
Accrued warranty	164	199
Other long-term liabilities	511	533
Total liabilities	10,710	11,124
Stockholders’ equity:
Preferred stock, $0.01 par value, 2,000,000 shares authorized, no shares issued and outstanding
Common stock, $0.01 par value: Authorized: 30,000,000 shares; Issued and outstanding 11,663,838 and 11,596,274 shares as of June 30, 2018 and December 30, 2017, respectively	126	126
Additional paid-in capital	60,138	59,385
Accumulated other comprehensive income	41
Accumulated deficit	(35,872)	(28,989)
Total stockholders’ equity	24,433	30,522
Total liabilities and stockholders’ equity	$ 35,143	$ 41,646

[1] Derived from the audited consolidated financial statements included in the Annual Report on Form 10-K filed with the SEC for the year ended December 30, 2017.