SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2012

Accounting Policies [Abstract]

Available-for-sale Securities [Table Text Block]

Amortized cost and estimated fair market value of investments classified as available-for-sale at December 31, 2012, were as follows(in thousands):

			Gross Unrealized
	Amortized Cost		Gains		Losses		Estimated Fair Market Value
Investments due in less than 3 months:
Corporate securities	$	1,500	$	1	$	—	$	1,501
Total	$	1,500	$	1	$	—	$	1,501
Investments due in 4-12 months:
Corporate securities	$	24,127	$	83	—		$	24,210
Total	$	24,127	$	83	—		$	24,210
Investments due in more than 12 months:
Corporate securities	$	6,000	$	55	$	—	$	6,055
Total	$	6,000	$	55	$	—	$	6,055
Total investment securities	$	31,627	$	139	$	—	$	31,766

Schedule of Held-to-maturity Securities [Table Text Block]

Amortized cost and estimated fair market value of investments classified as held-to-maturity at December 31, 2011, were as follows(in thousands):

			Gross Unrealized
	Amortized Cost		Gains		Losses			Estimated Fair Market Value
Investments due in less than 3 months:
Commercial paper	$	9,849	$	—	$	—		$	9,849
Corporate securities	6,098		9		(1		)	6,106
Total	$	15,947	$	9	$	(1	)	$	15,955
Investments due in 4-12 months:
Corporate securities	$	24,801	$	179	$	(23	)	$	24,957
Certificates of deposit	10,000		1		—			10,001
Total	$	34,801	$	180	$	(23	)	$	34,958
Investments due in more than 12 months:
Corporate securities	$	32,041	$	5	$	(178	)	$	31,868
Total	$	32,041	$	5	$	(178	)	$	31,868
Total investment securities	$	82,789	$	194	$	(202	)	$	82,781

Schedule of Inventories [Table Text Block]

Inventories consist of the following (in thousands):

	December 31, 2012		December 31, 2011
Raw materials	$	10,564	$	12,389
Work-in-process	12,122		7,841
Finished goods	21,939		31,780
Total	$	44,625	$	52,010

Schedule of Accounts Receivable [Table Text Block]

Accounts Receivable (in thousands):

	December 31, 2012			December 31, 2011
Accounts receivable trade	$	33,866		$	27,972
Accrued ship and debit and rebate claims	(26,293		)	(18,361		)
Allowance for doubtful accounts	(247		)	(215		)
Total	$	7,326		$	9,396

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

Prepaid Expenses and Other Current Assets (in thousands):

	December 31, 2012		December 31, 2011
Prepaid legal fees	$	1,760	$	3,500
Advance to supplier	1,170		—
Prepaid income tax	11,463		118
Prepaid maintenance agreements	616		669
Interest receivable	149		625
Other	2,243		2,156
Total	$	17,401	$	7,068

Schedule of Other Assets, Noncurrent [Table Text Block]

Other Assets (in thousands):

	December 31, 2012		December 31, 2011
Prepaid royalty (Note 12)	$	—	$	10,000
Investment in third party (Note 12)	—		7,000
Financing lease receivables and deposits (Note 12)	—		7,558
Distributor ship and debit advance credit	2,536		—
Other	2,137		1,953
Total	$	4,673	$	26,511

Schedule of Other Accrued Liabilities [Table Text Block]

Other Accrued Liabilities (in thousands):

	December 31, 2012		December 31, 2011
Accrued professional fees	$	1,328	$	892
Accrued expense for engineering wafers	516		402
Advances from customers	646		596
Other	949		415
Total	$	3,439	$	2,305

Schedule of Property and Equipment [Table Text Block]

Building and improvements	4-40 years or life of lease agreement, if shorter
Machinery and equipment	2-8 years
Office furniture and equipment	4 years

Property and equipment consist of the following (in thousands):

	December 31, 2012			December 31, 2011
Land	$	16,754		$	16,754
Construction-in-progress	9,431			17,296
Building and improvements	42,819			32,599
Machinery and equipment	101,438			92,919
Office furniture and equipment	28,791			23,897
	199,233			183,465
Accumulated depreciation	(109,509		)	(95,224		)
Total	$	89,724		$	88,241