Note 1 - Organization and Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Schedule of Property, Plant and Equipment, Annual Depreciation Rates [Table Text Block]

	%
Computers, software and equipment	10	-	33
Office furniture and equipment	7	-	33
Leasehold improvements	10	-	20
	(the shorter of the expected lease term or useful economic life)

Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]

	2018			2019			2020
Expected dividend yield		0%			0%			0%
Expected volatility	35%	-	42%	42%	-	43%	32%	-	60%
Risk-free interest rate	0.7%	-	2.2%	2.0%	-	2.5%	0.1%	-	1.9%
Expected forfeiture		0%			0%			0%
Contractual term of up to (in months)	24			24			24

Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

	Year ended December 31,
	2018		2019		2020
Cost of revenue	$	588	$	630	$	639
Research and development, net		5,141		5,857		6,874
Sales and marketing		1,587		1,495		2,038
General and administrative		3,051		2,736		4,085
Total equity-based compensation expense	$	10,367	$	10,718	$	13,636

Financing Receivable, Allowance for Credit Loss [Table Text Block]

	Balance at beginning of period		Additions		Deduction			Balance at end of period
Year ended December 31, 2020
Allowance for credit losses	$	327	$	1,443	$	(1,470	)	$	300
Year ended December 31, 2019
Allowance for doubtful accounts	$	—	$	327	$	—		$	327
Year ended December 31, 2018
Allowance for doubtful accounts	$	—	$	—	$	—		$	—

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Year ended December 31,
	2018		2019		2020
Numerator:
Net income (loss)	$	574	$	28	$	(2,379	)
Denominator (in thousands):
Basic weighted-average common stock outstanding		22,034		21,932		22,107
Effect of stock-based awards		469		391		—
Diluted weighted-average common stock outstanding		22,503		22,323		22,107
Basic net income (loss) per share	$	0.03	$	0.00	$	(0.11	)
Diluted net income (loss) per share	$	0.03	$	0.00	$	(0.11	)

Immervision [Member]

Notes Tables

Schedule of Business Acquisitions, by Acquisition [Table Text Block]

Prepaid expenses	$	2,937
Intangible assets:
Core technologies		7,063
Total assets	$	10,000

Acquisition of Hillcrest Labs [Member]

Notes Tables

Schedule of Business Acquisitions, by Acquisition [Table Text Block]

Tangible assets (including inventory, property and equipment and other)	$	681
Intangible assets:
Developed technologies		2,475
Customer relationships		3,518
Customer backlog		72
Goodwill		4,458
Total assets	$	11,204