STOCK-BASED COMPENSATION (Tables)

12 Months Ended

Dec. 31, 2012

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

Schedule of Valuation Assumptions to Determine the Fair Value of Stock Options

The Black-Scholes model requires the input of highly subjective assumptions, which are summarized in the table below for the years ended December 31, 2012, 2011 and 2010.

	Years Ended December 31,
	2012	2011	2010
Expected dividend yield	—	—	—
Expected stock price volatility	82%	77%	74%
Risk-free interest rate	0.5%	1.8%	2.1%
Expected life of options in years	1.5 - 5	5	5

Schedule of Stock-Based Compensation by Type of Award and Category of Expense

Our stock-based compensation for the years ended December 31, 2012, 2011 and 2010 was as follows (in thousands):

	Years Ended December 31,
	2012		2011		2010
Stock-based compensation by type of award:
Stock options	$	1,527	$	2,167	$	2,442
Restricted stock units	18		112		263
Employee stock purchase plan	20		25		39
	$	1,565	$	2,304	$	2,744
Stock-based compensation by category of expense:
Cost of sales	$	68	$	82	$	96
Research, development and engineering	308		367		451
Selling, general and administrative	1,189		1,855		2,197
	$	1,565	$	2,304	$	2,744