Consolidated Balance Sheets - USD ($) $ in Thousands	Jan. 02, 2021	Dec. 28, 2019
Current assets:
Cash and cash equivalents	$ 11,626	$ 12,653
Accounts receivable, net of allowance for doubtful accounts of $244 as of January 2, 2021 and $187 as of December 28, 2019	7,289	9,323
Inventories	5,714	8,174
Prepaid expenses and other current assets	730	401
Total current assets	25,359	30,551
Property and equipment, net	449	730
Intangible assets, net	68	84
Goodwill	533	533
Operating lease right-of-use assets, net	1,428	2,764
Other long-term assets	132	151
Total assets	27,969	34,813
Current liabilities:
Accounts payable	1,148	2,592
Accrued compensation	1,965	2,398
Accrued expenses	1,806	1,544
Current portion of PPP loan	1,249
Accrued warranty	166	380
Deferred revenue	938	1,450
Operating lease liabilities	1,409	1,414
Total current liabilities	8,681	9,778
Long-term liabilities:
PPP loan	1,248
Accrued warranty	81	156
Deferred revenue	289	360
Operating lease liabilities	282	1,795
Other long-term liabilities	22	19
Total liabilities	10,603	12,108
Commitments and contingencies (Note 10)
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 13,899,683 and 13,785,233 shares as of January 2, 2021 and December 28, 2019, respectively	148	147
Additional paid-in capital	74,181	73,093
Accumulated other comprehensive income (loss)	(19)	80
Accumulated deficit	(56,944)	(50,615)
Total stockholders’ equity	17,366	22,705
Total liabilities and stockholders’ equity	$ 27,969	$ 34,813