SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

6 Months Ended

Jun. 30, 2011

Accounting Policies [Abstract]

Held-to-maturity Securities [Table Text Block]

Amortized cost and estimated fair market value of investments classified as held-to-maturity at June 30, 2011, are as follows(in thousands):

			Gross Unrealized
	Amortized Cost		Gains		Losses		Estimated Fair Market Value
Investments due in less than 3 months:
U.S. municipal securities	$	1,000	$	—	$	—	$	1,000
U.S. government securities	5,026		8		—		5,034
Corporate securities	1,426		—		—		1,426
Total	$	7,452	$	8	$	—	$	7,460
Investments due in 4-12 months:
Corporate securities	$	25,639	$	250	—		$	25,889
Total	$	25,639	$	250	—		$	25,889
Investments due in more than 12 months:
Corporate securities	$	30,043	$	428	$	—	$	30,471
Total	$	30,043	$	428	$	—	$	30,471
Total investment securities	$	63,134	$	686	$	—	$	63,820

Amortized cost and estimated fair market value of investments classified as held-to-maturity at December 31, 2010 are as follows(in thousands):

			Gross Unrealized
	Amortized Cost		Gains		Losses			Estimated Fair Market Value
Investments due in less than 3 months:
Commercial paper	$	7,135	—		—			$	7,135
Corporate securities	1,508		—		(1		)	1,507
Total	$	8,643	—		$	(1	)	$	8,642
Investments due in 4-12 months:
Corporate securities	$	21,255	$	84	—			$	21,339
U.S. government securities	5,095		20		—			5,115
U.S. municipal securities	1,005		3		—			1,008
Total	$	27,355	$	107	—			$	27,462
Investments due in more than 12 months:
Corporate securities	$	31,760	$	648	—			$	32,408
Total	$	31,760	$	648	—			$	32,408
Total investment securities	$	67,758	$	755	$	(1	)	$	68,512

Schedule of Comprehensive Income (Loss) [Table Text Block]

Comprehensive income consists of net income, plus the effect of foreign currency translation adjustments. The components of comprehensive income, net of taxes, are as follows (in thousands):

	Three Months Ended					Six Months Ended
	June 30,					June 30,
	2011		2010			2011		2010
Net income	$	10,599	$	15,587		$	20,453	$	27,901
Other comprehensive income:
Translation adjustments	23		(5		)	72		(55		)
Total comprehensive income	$	10,622	$	15,582		$	20,525	$	27,846

Schedule of Accounts Receivable [Table Text Block]

Accounts Receivable (in thousands):

	June 30, 2011			December 31, 2010
Accounts receivable trade	$	33,255		$	30,656
Accrued ship and debit and rebate claims	(24,874		)	(24,839		)
Allowance for doubtful accounts	(312		)	(275		)
Other	1			171
Total	$	8,070		$	5,713

Schedule of Prepaid Expenses and Other Current Assets [Table Text Block]

Prepaid Expenses and Other Current Assets (in thousands):

	June 30, 2011		December 31, 2010
Prepaid legal fees	$	2,000	$	4,000
Prepaid inventory (Note 16)	—		917
Note receivable (Note 4)	3,000		—
Prepaid income tax	1,289		1,117
Prepaid maintenance agreements	501		554
Interest receivable	690		737
Other	2,092		1,938
Total	$	9,572	$	9,263

Schedule of Other Assets, Noncurrent [Table Text Block]

Other Assets (in thousands):

	June 30, 2011		December 31, 2010
Prepaid royalty (Note 15)	$	10,000	$	10,000
Investment in third party (Note 15)	7,000		7,000
Financing lease receivables and deposits (Note 17)	7,191		—
Other	1,164		288
Total	$	25,355	$	17,288

Schedule of Accrued Liabilities Table taxt block [Table Text Block]

Other Accrued Liabilities (in thousands):

	June 30, 2011		December 31, 2010
Accrued payment for acquisition (Note 14)	$	40	$	6,955
Accrued professional fees	1,085		1,013
Accrued expense for engineering wafers	488		502
Advances from customers	410		713
Other	344		365
Total	$	2,367	$	9,548