Share-based Compensation Expense (Tables)

9 Months Ended

Sep. 30, 2013

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

Schedule of share-based compensation expense

Share-based compensation expense for the three and nine months ended September 30, 2013 and 2012 has been recorded as follows:

	Three months ended September 30,				Nine months ended September 30,
	2013		2012		2013		2012
Cost of goods sold	$	2	$	2	$	7	$	3
Sales and marketing	21		15		55		45
Research and product development	14		9		37		26
General and administrative	42		39		106		102
	$	79	$	65	$	205	$	176

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 September 30,		Nine months ended September 30,
	2013	2012	2013	2012
Risk-free interest rate, average	2.3%	1.1%	1.8%	1.3%
Expected option life, average	6.7 years	7.3 years	6.8 years	7.2 years
Expected price volatility, average	49.5%	51.1%	49.8%	51.4%
Weighted average per share fair value	$4.28	$2.13	$4.38	$2.19