Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Current assets:
Cash and cash equivalents	$ 12,653	$ 21,194
Accounts receivable, net of allowance for doubtful accounts of $187 as of December 28, 2019 and $213 as of December 29, 2018	9,323	9,083
Inventories	8,174	8,794
Prepaid expenses and other current assets	401	547
Total current assets	30,551	39,618
Property and equipment, net	730	1,220
Intangible assets, net	84	100
Goodwill	533	533
Operating lease right-of-use assets, net	2,764
Other long-term assets	151	201
Total assets	34,813	41,672
Current liabilities:
Accounts payable	2,592	2,516
Accrued compensation	2,398	2,962
Accrued expenses	1,544	2,763
Accrued warranty	380	622
Deferred revenue	1,450	1,639
Operating lease liabilities	1,414
Total current liabilities	9,778	10,502
Long-term liabilities:
Accrued warranty	156	238
Deferred revenue	360	586
Operating lease liabilities	1,795
Other long-term liabilities	19	385
Total liabilities	12,108	11,711
Commitments and contingencies (Note 9)
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 13,785,233 and 13,602,052 shares as of December 28, 2019 and December 29, 2018, respectively	147	145
Additional paid-in capital	73,093	71,548
Accumulated other comprehensive income	80	70
Accumulated deficit	(50,615)	(41,802)
Total stockholders’ equity	22,705	29,961
Total liabilities and stockholders’ equity	$ 34,813	$ 41,672