CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Net revenue	$ 116,383,000	$ 112,915,000	$ 103,769,000
Cost of revenue	74,219,000	71,971,000	66,702,000
Gross profit	42,164,000	40,944,000	37,067,000
Operating expenses:
Research and development	11,590,000	9,916,000	8,673,000
Selling and marketing	22,555,000	20,730,000	17,033,000
General and administrative	12,360,000	10,429,000	11,891,000
Restructuring and severance	714,000	202,000	817,000
Total operating expenses	47,219,000	41,277,000	38,414,000
Loss from operations	(5,055,000)	(333,000)	(1,347,000)
Non-operating income (expense):
Interest expense, net	(427,000)	(143,000)	(483,000)
Gain on forgiveness of Paycheck Protection Program note			2,946,000
Gain on investment	132,000	30,000	611,000
Foreign currency gains (losses), net	25,000	155,000	(79,000)
Income (loss) before income tax provision	(5,325,000)	(291,000)	1,648,000
Income tax provision	(164,000)	(101,000)	(28,000)
Net income (loss)	(5,489,000)	(392,000)	1,620,000
Other comprehensive income (loss):
Foreign currency translation adjustment, net of tax	228,000	(848,000)	(629,000)
Comprehensive income (loss)	$ (5,261,000)	$ (1,240,000)	$ 991,000
Net income (loss) per common share:
Basic	$ (0.29)	$ (0.07)	$ 0.02
Diluted	$ (0.29)	$ (0.07)	$ 0.02
Weighted average shares used in computing net income (loss) per common share:
Basic	23,068	22,659	21,340
Diluted	23,068	22,659	22,267