Significant Accounting Policies and Related Matters (Tables)

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Summary of Advertising Costs

Advertising Costs

Advertising costs are expensed as incurred and are included as a component of sales and marketing expense in the accompanying consolidated statements of operations. Advertising costs are as follows:

	Year ended December 31,
	2017		2016		2015
	(in thousands)
Advertising expense	$	305	$	378	$	428

Summary of Allowance for Doubtful Accounts and Sales Returns

The following is a summary of our allowance for doubtful accounts and sales returns:

	Balance at Beginning of Period		Additions (recoveries) charged to Income		Deductions from Reserves		Balance at End of Period
	(in thousands)
Allowance for doubtful accounts and sales returns:
Year ended December 31, 2017	$	258	$	230	$	139		349
Year ended December 31, 2016		243		105		90		258
Year ended December 31, 2015		242		182		181		243

Summary of Property and Equipment

Property and equipment are recorded at cost. Depreciation is provided over the estimated useful lives of the related assets using straight-line method as follows:

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

Computation of Basic and Diluted Net Income per Share

The computation of basic and diluted net income per share is as follows:

	Year ended December 31,
	2017		2016		2015
	(in thousands, except per share data)
Basic:
Net income available for common stockholders	$	17,177	$	10,590	$	7,758
Weighted average shares outstanding		18,961		18,485		17,764
Basic earnings per share	$	0.91	$	0.57	$	0.44
Diluted:
Net income available for common stockholders	$	17,177	$	10,590	$	7,758
Weighted-average shares outstanding		18,961		18,485		17,764
Common stock equivalents, if dilutive		1,072		756		552
Shares used in computing diluted earnings per common share		20,033		19,241		18,316
Diluted earnings per share	$	0.86	$	0.55	$	0.42
Shares excluded in computing diluted earnings per share as those shares would be anti-dilutive		6		45		55