CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jan. 01, 2022	Jan. 02, 2021
Current assets:
Cash and cash equivalents	$ 102,728	$ 29,341
Short-term investments	10,221	14,839
Trade and other accounts receivable, net of allowances of $0 at both January 1, 2022 and January 2, 2021	14,261	28,646
Inventories	5,791	21,689
Prepaid expenses and other current assets	1,827	1,893
Total current assets	134,828	96,408
Property, plant and equipment, net	4,759	11,004
Operating lease right-of-use assets	4,520	8,165
Long-term investments	7,427	5,388
Restricted cash	786	787
Deferred income taxes and other long-term assets	5,449	5,486
Total assets	157,769	127,238
Current liabilities:
Current operating lease liabilities	3,119	2,853
Accounts payable	5,320	4,259
Accrued payroll and related liabilities	5,505	7,679
Other accrued liabilities	3,665	3,598
Customer advances	2,107	33
Total current liabilities	19,716	18,422
Noncurrent liabilities:
Noncurrent operating lease liabilities	3,675	6,803
Other long-term liabilities	363	457
Total noncurrent liabilities	4,038	7,260
Commitments and contingencies
Stockholders' equity:
Undesignated preferred stock, $0.001 par value, 10,000 shares authorized, no shares issued and outstanding		0
Common stock, $0.001 par value: Authorized shares — 50,000 issued and outstanding shares — 24,636 and 23,874 at January 1, 2022 and January 2, 2021, respectively	25	24
Additional paid-in capital	199,073	193,173
Treasury stock, 5,087 shares at both January 1, 2022 and January 2, 2021	(29,551)	(29,551)
Accumulated other comprehensive income	578	640
Accumulated deficit	(36,110)	(62,730)
Total stockholders' equity	134,015	101,556
Total liabilities and stockholders' equity	$ 157,769	$ 127,238