Share-based Compensation Expense (Tables)

6 Months Ended

Jun. 30, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of share-based compensation expense

Share-based compensation expense has been recorded as follows:

	Three months ended June 30,				Six months ended June 30,
	2013		2012		2013		2012
Cost of goods sold	$	2	$	2	$	4	$	1
Sales and marketing	19		16		34		30
Research and product development	13		10		24		17
General and administrative	33		32		64		63
	$	67	$	60	$	126	$	111

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

In applying the Black-Scholes methodology to the options granted, the Company used the following assumptions:

	Three months ended June 30,		Six months ended June 30,
	2013	2012	2013	2012
Risk-free interest rate, average	1.2%	1.2%	1.2%	1.5%
Expected option life, average	6.8 years	7.0 years	6.8 years	7.1 years
Expected price volatility, average	50.1%	51.7%	50.1%	51.6%
Weighted average per share fair value	$4.49	$2.07	$4.49	$2.23