Note 1 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

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

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