Intangibles and Other Assets (Tables)

3 Months Ended

Mar. 31, 2013

Intangibles and Other Assets [Abstract]

Schedule of intangibles and other assets

	March 31,			December 31,
	2013			2012
	(In thousands)
Patents and trademarks	$	27,057		$	26,206
Other assets		192			192
Gross intangibles and other assets		27,249			26,398
Accumulated amortization of patents and trademarks		(10,978	)		(10,673	)
Intangibles and other assets, net	$	16,271		$	15,725

Schedule of amortization of intangibles excluding impairments or abandonments

		Three Months Ended
	March 31,
	2013		2012
	(In thousands)
Amortization of Intangibles - excluding abandonments or impairments	$	298	$	242

Schedule of estimated remaining annual amortization expense for issued patents and trademarks

	Estimated Amortization Expense
	(In thousands)
Remainder of 2013	$	885
2014		1,075
2015		968
2016		882
2017		756
Thereafter		2,102
Total	$	6,668

Schedule of patents in process

	March 31,		December 31,
	2013		2012
	(In thousands)
Patents in process	$	9,411	$	9,270