Note 1 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]

	As reported under ASC Topic 606			Adjustments			Balances under Prior GAAP
	(In thousands)
Other long-term assets	$	5,971		$	(5,217	)	$	754
Deferred revenue		12,566			(106	)		12,460
Retained earnings (deficit)		(24,010	)		4,610			(19,400	)

	As reported under Topic 606			Adjustments		Balances under Prior GAAP
	(In thousands)
Products revenue	$	142,535		$	274	$	142,261
Service revenue		20,185			280		19,905
Sales and marketing		58,420			540		58,960
Interest and other income, net*		(123	)		297		174

	As reported under Topic 842			Adjustments			Balances under Prior GAAP
Operating lease right-of-use assets	$	10,049		$	(10,049	)	$	—
Operating lease liabilities		(2,430	)		2,430			—
Other long-term liabilities*		—			140			140
Operating lease liabilities, net of current portion		(7,759	)		7,759			—

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

	Useful Lives
Leasehold improvements	Lesser of useful life or term of lease
Office equipment and furniture (in years)	3
Machinery and equipment (in years)	3