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Note 1 - Organization and Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

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	-	25
		(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]

		2017				2018				2019
Expected dividend yield			0%				0%				0%
Expected volatility		28%	-	46%		35%	-	42%		42%	-	43%
Risk-free interest rate		0.5%	-	1.1%		0.7%	-	2.2%		2.0%	-	2.5%
Expected forfeiture			0%				0%				0%
Contractual term of up to (months)			24				24				24

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

		Year ended December 31,
		2017				2018				2019
Cost of revenue		$	459			$	588			$	630
Research and development, net			3,839				5,141				5,857
Sales and marketing			1,428				1,587				1,495
General and administrative			2,967				3,051				2,736
Total equity-based compensation expense		$	8,693			$	10,367			$	10,718

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, 2019
Allowance for doubtful accounts		$	—			$	327			$	—			$	327
Year ended December 31, 2018
Allowance for doubtful accounts		$	—			$	—			$	—			$	—
Year ended December 31, 2017
Allowance for doubtful accounts		$	—			$	—			$	—			$	—

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

		Year ended December 31,
		2017				2018				2019
Numerator :
Net income		$	17,028			$	574			$	28
Denominator (in thousands) :
Basic weighted-average common stock outstanding			21,771				22,034				21,932
Effect of stock-based awards			790				469				391
Diluted weighted-average common stock outstanding			22,561				22,503				22,323
Basic net earnings per share		$	0.78			$	0.03			$	0.00
Diluted net earnings per share		$	0.75			$	0.03			$	0.00

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

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