CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Current assets:
Cash and cash equivalents	$ 19,767	$ 18,715
Short-term investments	16,720	16,076
Trade and other accounts receivable, net of allowances of $0 at both December 28, 2019 and December 29, 2018	28,619	27,717
Inventories	24,907	30,597
Prepaid expenses and other current assets	1,504	2,528
Total current assets	91,517	95,633
Long-term investments	5,537	4,372
Restricted cash	787	1,169
Property, plant and equipment, net	11,598	11,198
Operating lease right-of-use assets	10,279
Intangible assets, net of amortization of $8,113 and $7,498 at December 28, 2019 and December 29, 2018, respectively	274	889
Deferred income taxes and other long-term assets	6,330	8,809
Total assets	126,322	122,070
Current liabilities:
Current operating lease liabilities	2,524
Accounts payable	4,199	6,053
Accrued payroll and related liabilities	6,488	4,689
Other accrued liabilities	3,593	4,952
Customer advances	4,007	14,314
Total current liabilities	20,811	30,008
Noncurrent liabilities:
Noncurrent operating lease liabilities	9,532
Other long-term liabilities	186	2,438
Total noncurrent liabilities	9,718	2,438
Stockholders' equity:
Undesignated preferred stock, $0.001 par value, 10,000 shares authorized, no shares issued and outstanding
Common stock, $0.001 par value : Authorized shares—50,000 issued and outstanding shares—23,346 and 22,700 at December 28, 2019 and December 29, 2018, respectively	23	23
Additional paid-in capital	188,290	183,204
Treasury stock, 4,989 shares at December 28, 2019 and 4,965 shares at December 29, 2018	(29,158)	(29,047)
Accumulated other comprehensive income	424	378
Accumulated deficit	(63,786)	(64,934)
Total stockholders' equity	95,793	89,624
Total liabilities and stockholders' equity	$ 126,322	$ 122,070