Note 1 - Description of Business and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Schedule of Error Corrections and Prior Period Adjustments [Table Text Block]

	Year Ended December 31, 2018
			Change in
	Previously		Presentation		Current
	Reported		Reclassification		Presentation
Revenues:
Design-to-silicon-yield solutions	$	60,081	$	(60,081)		N/A
Gainshare performance incentives		25,713		(25,713)		N/A
Analytics		N/A		38,502	$	38,502
Integrated Yield Ramp		N/A		47,292		47,292
Total revenues	$	85,794	$	—	$	85,794

Allowance for Doubtful Accounts [Table Text Block]

	Balance at Beginning of Period		Charged to Costs and Expenses		Deductions/ Write-offs of Accounts		Balance at End of Period
Allowance for doubtful accounts
2019	$	332	$	—	$	119	$	213
2018	$	374	$	—	$	42	$	332

Property Plant and Equipment Estimated Useful Lives [Table Text Block]

Computer equipment	3
Software	3
Furniture, fixtures, and equipment	3 - 10
Laboratory and test equipment	3 - 10
Leasehold improvements	Shorter of estimated useful life or term of lease