SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)	3 Months Ended				12 Months Ended
	Mar. 31, 2015		Mar. 31, 2014		Dec. 31, 2014
Deferred Revenue [Abstract]
Net product sales, percentage	75.00%				75.00%
Deferred revenue	$ 30,000,000				$ 25,000,000
Deferred cost	12,700,000				9,800,000
Accounts Receivable [Abstract]
Accounts receivable trade	47,058,000				38,344,000
Accrued ship and debit and rebate claims	(34,241,000)				(27,967,000)
Allowance for doubtful accounts	(186,000)				(191,000)
Total	12,631,000				10,186,000
Prepaid Expenses and Other Current Assets [Abstract]
Prepaid legal fees	41,000				1,506,000
Loan to Cambridge Semiconductor	0				6,600,000
Prepaid income tax	3,208,000				3,208,000
Prepaid maintenance agreements	1,229,000				1,023,000
Interest receivable	387,000				664,000
VAT receivable	901,000				987,000
Supplier Prepayment	1,466,000				800,000
Other	4,226,000				1,591,000
Total	11,458,000				16,379,000
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(1,136,000)		(470,000)		(470,000)
Other comprehensive income (loss) before reclassifications	91,000		141,000
Amounts reclassified from accumulated other comprehensive income	14,000		14,000
Total other comprehensive income	105,000		155,000
Ending balance	(1,031,000)		(315,000)		(1,136,000)
Unrealized Gains and Losses on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	83,000		210,000		210,000
Other comprehensive income (loss) before reclassifications	56,000		147,000
Amounts reclassified from accumulated other comprehensive income	0		0
Total other comprehensive income	56,000		147,000
Ending balance	139,000		357,000
Defined Benefit Pension Items [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(1,240,000)		(780,000)		(780,000)
Other comprehensive income (loss) before reclassifications	0		0
Amounts reclassified from accumulated other comprehensive income	14,000	[1]	14,000	[1]
Total other comprehensive income	14,000		14,000
Ending balance	(1,226,000)		(766,000)
Foreign Currency Items [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	21,000		100,000		100,000
Other comprehensive income (loss) before reclassifications	35,000		(6,000)
Amounts reclassified from accumulated other comprehensive income	0		0
Total other comprehensive income	35,000		(6,000)
Ending balance	$ 56,000		$ 94,000

[1] This component of accumulated other comprehensive income is included in the computation of net periodic pension cost for the three months ended March 31, 2015 and 2014.