Condensed Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
ASSETS
Cash and cash equivalents	$ 5,107	$ 8,192
Short-term investment securities	22,569	22,562
Accounts receivable, net of allowances of $49 and $64 at March 31, 2022 and December 31, 2021, respectively	17,329	18,905
Inventories, net	12,852	13,691
Prepaid expenses and other assets	1,956	1,747
Total current assets	59,813	65,097
Property and equipment, net	11,490	11,949
Goodwill	6,220	6,334
Intangible assets, net	1,429	1,579
Other noncurrent assets	2,346	2,438
TOTAL ASSETS	81,298	87,397
LIABILITIES AND STOCKHOLDERS’ EQUITY
Accounts payable	4,013	5,360
Accrued liabilities	8,953	11,117
Total current liabilities	12,966	16,477
Long-term liabilities	3,820	3,999
Total liabilities	16,786	20,476
Stockholders’ equity:
Common stock, $0.001 par value, 50,000,000 shares authorized at March 31, 2022 and December 31, 2021, respectively, and 18,453,698 and 18,238,030 shares issued and outstanding at March 31, 2022 and December 31, 2021, respectively	18	18
Additional paid-in capital	123,379	123,998
Accumulated deficit	(58,299)	(56,735)
Accumulated other comprehensive loss	(586)	(360)
Total stockholders’ equity	64,512	66,921
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 81,298	$ 87,397