CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 28, 2020	Dec. 28, 2019
Current assets:
Cash and cash equivalents	$ 21,450	$ 19,767
Short-term investments	16,441	16,720
Trade and other accounts receivable, net of allowances of $0 at both March 28, 2020 and at December 28, 2019	23,021	28,619
Inventories	27,208	24,907
Prepaid expenses and other current assets	1,897	1,504
Total current assets	90,017	91,517
Long-term investments	4,549	5,537
Restricted cash	787	787
Property, plant and equipment, net	12,038	11,598
Operating lease right-of-use assets	9,730	10,279
Intangible assets, net of accumulated amortization of $8,267 at March 28, 2020 and $8,113 at December 28, 2019	120	274
Deferred income taxes and other long-term assets	6,138	6,330
Total assets	123,379	126,322
Current liabilities:
Current operating lease liabilities	2,614	2,524
Accounts payable	4,747	4,199
Accrued payroll and related liabilities	4,030	6,488
Other accrued liabilities	2,651	3,593
Customer advances	4,696	4,007
Total current liabilities	18,738	20,811
Noncurrent liabilities:
Noncurrent operating lease liabilities	8,819	9,532
Other long-term liabilities	153	186
Total noncurrent liabilities	8,972	9,718
Stockholders' equity:
Common stock, $0.001 par value	23	23
Additional paid-in capital	189,876	188,290
Treasury stock, 5,087 shares at March 28, 2020 and 4,989 shares at December 28, 2019	(29,551)	(29,158)
Accumulated other comprehensive income	331	424
Accumulated deficit	(65,010)	(63,786)
Total stockholders' equity	95,669	95,793
Total liabilities and stockholders' equity	$ 123,379	$ 126,322