RESTATEMENT OF CONSOLIDATED FINANCIAL STATEMENTS Adjustments to Condensed Consolidated Statement of Cash Flows (Details) (USD $)	9 Months Ended	12 Months Ended	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2012 Restatement Adjustment [Member]	Sep. 30, 2012 Other Adjustment [Member]	Sep. 30, 2012 Discontinued Operations [Member]	Sep. 30, 2012 Scenario, Actual [Member]	Sep. 30, 2012 Scenario, Previously Reported [Member]
Net (loss) income	$ 20,024,000		$ 84,589,000	$ 9,537,000	$ 47,717,000	$ 72,226,000	$ (69,617,000)
Depreciation and amortization	16,970,000		0	39,000	0	20,944,000	20,905,000
Recovery of doubtful accounts	140,000		0	36,000	0	(65,000)	(101,000)
Non-cash provision for restructuring	0		0	(3,491,000)	0	1,459,000	4,950,000
Non-cash provision for allowances for divestiture			0	(1,041,000)	0	0	1,041,000
Gain on sales of assets	125,000		0	5,000	0	252,000	(257,000)
Gain on divestiture of consumer business	0		0	0	(37,972,000)	(37,972,000)	0
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property			0	0	(9,745,000)	0	9,745,000
Stock-based compensation	5,716,000		0	1,951,000	0	9,025,000	7,074,000
Non-cash interest expense	220,000		0	0	0	220,000	220,000
Foreign currency transaction (gains) losses	(856,000)		0	2,830,000	0	(1,619,000)	(1,211,000)
Provision for deferred taxes	6,000		0	0	0	823,000	(823,000)
Accounts receivable	12,255,000		609,000	(1,484,000)	0	29,076,000	(28,201,000)
Inventories	7,473,000		0	3,793,000	0	13,202,000	(16,995,000)
Prepaid expenses and other current assets	965,000		0	(2,821,000)	0	116,000	2,705,000
Accounts payable	(4,823,000)		0	0	0	(6,247,000)	(6,247,000)
Accrued expenses, compensation and benefits and other liabilities	(1,348,000)		0	(3,616,000)	0	(1,265,000)	2,351,000
Income taxes payable	(475,000)		0	627,000	0	711,000	84,000
Deferred revenues	(66,170,000)		(83,980,000)	2,000	0	(67,696,000)	16,282,000
Net cash provided by operating activities	(10,028,000)	(9,145,000)	0	1,731,000	0	32,686,000	30,955,000
Purchases of property and equipment, net	(8,998,000)		0	292,000	0	(6,951,000)	6,659,000
Proceeds from divestiture of consumer business	0		0	(1,869,000)	0	11,440,000	13,309,000
Proceeds from sale of assets	125,000					0
Change in other long-term assets	25,000		0	(264,000)	0	73,000	191,000
Net cash provided by investing activities	(8,898,000)		0	(2,425,000)	0	4,416,000	6,841,000
Proceeds from the issuance of common stock under employee stock plans, net	177,000		0	634,000	0	794,000	160,000
Common stock repurchases for tax withholdings for net settlement of equity awards	(263,000)			634,000	0	(634,000)	0
Proceeds from revolving credit facilities	0		0	0	0	14,000,000	14,000,000
Payments on revolving credit facilities	0		0	0	0	(14,000,000)	14,000,000
Net cash provided by financing activities	(86,000)		0	0	0	160,000	160,000
Effect of Exchange Rate on Cash and Cash Equivalents	(1,145,000)		0	694,000	0	1,242,000	548,000
Net decrease in cash and cash equivalents	(20,157,000)		0	0	0	38,504,000	38,504,000
Cash and Cash Equivalents, at Carrying Value	$ 50,233,000	$ 48,203,000	$ 0	$ 0	$ 0	$ 71,359,000	$ 71,359,000