Note 1 - Significant Accounting Policies and Related Matters (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Year ended December 31,
	2018		2017
Americas	$	63,649	$	62,696
Europe, Middle East and Africa		35,319		32,517
Asia/Pacific Rim		6,600		5,654
Total	$	105,568	$	100,867

Schedule of Advertising Expenses [Table Text Block]

	Year ended December 31,
	2018		2017		2016
			(in thousands)
Advertising expense	$	299	$	305	$	378

Allowance for Credit Losses on Financing Receivables [Table Text Block]

	Balance at		Additions		Deductions		Balance at
	Beginning		(recoveries) charged		from		End of
	of Period		to Income		Reserves		Period
	(in thousands)
Allowance for doubtful accounts and sales returns:
Year ended December 31, 2018	$	349	$	264	$	214	$	399
Year ended December 31, 2017		258		230		139		349
Year ended December 31, 2016		243		105		90		258

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

Description	Useful Life (in years)
Computers and equipment	3	–	5
Machinery and equipment	3	–	10
Leasehold improvements	The shorter of its useful life or lease term

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

	Year ended December 31,
	2018		2017		2016
	(in thousands, except per share data)
Basic:
Net income available for common stockholders	$	22,943	$	17,177	$	10,590
Weighted average shares outstanding		19,426		18,961		18,485
Basic earnings per share	$	1.18	$	0.91	$	0.57
Diluted:
Net income available for common stockholders	$	22,943	$	17,177	$	10,590
Weighted-average shares outstanding		19,426		18,961		18,485
Common stock equivalents, if dilutive		816		1,072		756
Shares used in computing diluted earnings per common share		20,242		20,033		19,241
Diluted earnings per share	$	1.13	$	0.86	$	0.55
Shares excluded in computing diluted earnings per share as those shares would be anti-dilutive		230		6		45