SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)	3 Months Ended			12 Months Ended
	Mar. 31, 2013		Mar. 31, 2012	Dec. 31, 2012
Deferred Revenue [Abstract]
Net product sales, percentage	74.00%			74.00%
Deferred revenue	$ 25,100,000			$ 20,700,000
Deferred cost	10,600,000			9,100,000
Accounts Receivable [Abstract]
Accounts receivable trade	42,315,000			33,866,000
Accrued ship and debit and rebate claims	(27,349,000)			(26,293,000)
Allowance for doubtful accounts	(227,000)			(247,000)
Total	14,739,000			7,326,000
Prepaid Expenses and Other Current Assets [Abstract]
Prepaid legal fees	1,502,000			1,760,000
Prepaid income tax	7,101,000			11,463,000
Prepaid maintenance agreements	649,000			616,000
Interest receivable	330,000			149,000
Supplier Prepayment	834,000			1,170,000
Other	2,880,000			2,243,000
Total	13,296,000			17,401,000
Accumulated Other Comprehensive Income (Loss) [Abstract]
Beginning balance	(293,000)
Other comprehensive income before reclassifications	(205,000)
Amounts reclassified from accumulated other comprehensive income	14,000
Total other comprehensive income (loss)	(191,000)		348,000
Ending balance	(484,000)			(293,000)
Unrealized Gains and Losses on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Abstract]
Beginning balance	138,000
Other comprehensive income before reclassifications	(54,000)
Amounts reclassified from accumulated other comprehensive income	0
Total other comprehensive income (loss)	(54,000)
Ending balance	84,000
Defined Benefit Pension Items [Member]
Accumulated Other Comprehensive Income (Loss) [Abstract]
Beginning balance	(560,000)
Other comprehensive income before reclassifications	0
Amounts reclassified from accumulated other comprehensive income	14,000	[1]
Total other comprehensive income (loss)	14,000
Ending balance	(546,000)
Foreign Currency Items [Member]
Accumulated Other Comprehensive Income (Loss) [Abstract]
Beginning balance	129,000
Other comprehensive income before reclassifications	(151,000)
Amounts reclassified from accumulated other comprehensive income	0
Total other comprehensive income (loss)	(151,000)
Ending balance	$ (22,000)

[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, 2013.