SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

3 Months Ended

Mar. 31, 2015

Accounting Policies [Abstract]

Available-for-sale Securities

Amortized cost and estimated fair market value of investments classified as available-for-sale at March 31, 2015, were as follows(in thousands):

	Amortized		Gross Unrealized					Estimated Fair
	Cost		Gains		Losses			Market Value
Investments due in less than 3 months:
Commercial paper	$	27,538	$	—	$	—		$	27,538
Corporate securities	2,257		1		—			2,258
Total	29,795		1		—			29,796
Investments due in 4-12 months:
Corporate securities	56,824		93		—			56,917
Total	56,824		93		—			56,917
Investments due between 12 months and 5-years:
Corporate securities	28,338		51		(4		)	28,385
Total	28,338		51		(4		)	28,385
Total marketable securities	$	114,957	$	145	$	(4	)	$	115,098

Corporate securities and commercial paper (as presented in the table above) have been included within marketable securities and cash and cash equivalents, respectively on the condensed consolidated balance sheets.

Amortized cost and estimated fair market value of investments classified as available-for-sale at December 31, 2014, were as follows(in thousands):    

	Amortized		Gross Unrealized					Estimated Fair
	Cost		Gains		Losses			Market Value
Investments due in 4-12 months:
Corporate securities	$	30,233	$	36	$	—		$	30,269
Total	30,233		36		—			30,269
Investments due between 12 months and 5-years:
Corporate securities	84,259		92		(45		)	84,306
Total	84,259		92		(45		)	84,306
Total marketable securities	$	114,492	$	128	$	(45	)	$	114,575

Schedule of Accounts Receivable

Accounts Receivable (in thousands):

	March 31, 2015			December 31, 2014
Accounts receivable trade	$	47,058		$	38,344
Accrued ship and debit and rebate claims	(34,241		)	(27,967		)
Allowance for doubtful accounts	(186		)	(191		)
Total	$	12,631		$	10,186

Schedule of Prepaid Expenses and Other Current Assets

Prepaid Expenses and Other Current Assets (in thousands):

	March 31, 2015		December 31, 2014
Prepaid legal fees	$	41	$	1,506
Loan to Cambridge Semiconductor (Note 10)	—		6,600
Prepaid income tax	3,208		3,208
Prepaid maintenance agreements	1,229		1,023
Interest receivable	387		664
VAT receivable	901		987
Supplier prepayment	1,466		800
Other	4,226		1,591
Total	$	11,458	$	16,379

Changes in Accumulated Other Comprehensive Income (Loss)

Changes in accumulated other comprehensive income (loss) for the three months ended March 31, 2015 and 2014 (in thousands):

	Unrealized Gains and Losses on Marketable Securities				Defined Benefit Pension Items										Foreign Currency Items					Total
	Three Months Ended				Three Months Ended										Three Months Ended					Three Months Ended
	March 31,				March 31,										March 31,					March 31,
	2015		2014		2015					2014					2015		2014			2015			2014
Beginning balance at January 1,	$	83	$	210	$	(1,240	)			$	(780	)			$	21	$	100		$	(1,136	)	$	(470	)
Other comprehensive income (loss) before reclassifications	56		147		—					—					35		(6		)	91			141
Amounts reclassified from accumulated other comprehensive income	—		—		14			(1	)	14			(1	)	—		—			14			14
Net-current period other comprehensive income (loss)	56		147		14					14					35		(6		)	105			155
Ending balance at March 31,	$	139	$	357	$	(1,226	)			$	(766	)			$	56	$	94		$	(1,031	)	$	(315	)

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(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.