Condensed Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
ASSETS
Cash and cash equivalents	$ 8,425	$ 5,761
Short-term investment securities	25,002	30,582
Accounts receivable, net of allowances of $80 and $113 at June 30, 2021 and December 31, 2020, respectively	16,786	16,601
Inventories, net	12,391	9,984
Prepaid expenses and other assets	1,583	1,685
Total current assets	64,187	64,613
Property and equipment, net	12,390	12,505
Long-term investment securities	0	4,640
Goodwill	6,522	3,332
Intangible assets, net	1,873	0
Other noncurrent assets	2,573	2,441
TOTAL ASSETS	87,545	87,531
LIABILITIES AND STOCKHOLDERS’ EQUITY
Accounts payable	4,723	4,430
Accrued liabilities	9,454	7,316
Total current liabilities	14,177	11,746
Long-term liabilities	4,345	4,387
Total liabilities	18,522	16,133
Stockholders’ equity:
Common stock, $0.001 par value, 50,000,000 shares authorized at June 30, 2021 and December 31, 2020, respectively, and 18,518,515 and 18,429,350 shares issued and outstanding at June 30, 2021 and December 31, 2020, respectively	19	18
Additional paid-in capital	126,791	128,250
Accumulated deficit	(57,719)	(56,888)
Accumulated other comprehensive (loss) income	(68)	18
Total stockholders’ equity	69,023	71,398
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 87,545	$ 87,531