Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 30, 2017	[1]
Current assets:
Cash and cash equivalents	$ 18,522	$ 21,707
Accounts receivable, net of allowance for doubtful accounts of $223 as of March 31, 2018 and $226 as of December 30, 2017	6,400	7,863
Inventories	9,306	9,381
Prepaid expenses and other current assets	681	500
Total current assets	34,909	39,451
Property and equipment, net	1,488	1,403
Intangible assets, net	112	116
Goodwill	533	533
Other long-term assets	170	143
Total assets	37,212	41,646
Current liabilities:
Accounts payable	1,976	1,724
Accrued compensation	1,741	2,459
Accrued expenses	2,358	2,153
Accrued warranty	935	1,536
Deferred revenue	2,245	2,520
Total current liabilities	9,255	10,392
Long-term liabilities:
Accrued warranty	180	199
Other long-term liabilities	522	533
Total liabilities	9,957	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 11,637,361 and 11,596,274 shares as of March 31, 2018 and December 30, 2017, respectively	126	126
Additional paid-in capital	59,698	59,385
Accumulated other comprehensive income	23
Accumulated deficit	(32,592)	(28,989)
Total stockholders’ equity	27,255	30,522
Total liabilities and stockholders’ equity	$ 37,212	$ 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.