Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 29, 2018	Dec. 30, 2017	[1]
Current assets:
Cash and cash equivalents	$ 23,725	$ 21,707
Accounts receivable, net of allowance for doubtful accounts of $213 as of September 29, 2018 and $226 as of December 30, 2017	8,430	7,863
Inventories	8,725	9,381
Prepaid expenses and other current assets	492	500
Total current assets	41,372	39,451
Property and equipment, net	1,312	1,403
Intangible assets, net	104	116
Goodwill	533	533
Other long-term assets	216	143
Total assets	43,537	41,646
Current liabilities:
Accounts payable	2,552	1,724
Accrued compensation	2,284	2,459
Accrued expenses	2,643	2,153
Accrued warranty	694	1,536
Deferred revenue	2,217	2,520
Total current liabilities	10,390	10,392
Long-term liabilities:
Accrued warranty	138	199
Other long-term liabilities	400	533
Total liabilities	10,928	11,124
Commitments and contingencies (Note 6)
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 13,594,799 and 11,596,274 shares as of September 29, 2018 and December 30, 2017, respectively	145	126
Additional paid-in capital	71,283	59,385
Accumulated other comprehensive income	127
Accumulated deficit	(38,946)	(28,989)
Total stockholders’ equity	32,609	30,522
Total liabilities and stockholders’ equity	$ 43,537	$ 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.