SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)	3 Months Ended				12 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Dec. 31, 2013
Deferred Revenue [Abstract]
Net product sales, percentage	75.00%				75.00%
Deferred revenue	$ 29,200,000				$ 25,500,000
Deferred cost	11,300,000				9,800,000
Accounts Receivable [Abstract]
Accounts receivable trade	47,842,000				42,410,000
Accrued ship and debit and rebate claims	(31,316,000)				(29,901,000)
Allowance for doubtful accounts	(105,000)				(120,000)
Total	16,421,000				12,389,000
Prepaid Expenses and Other Current Assets [Abstract]
Prepaid legal fees	5,129,000				6,267,000
Prepaid income tax	4,048,000				7,521,000
Prepaid maintenance agreements	725,000				947,000
Interest receivable	678,000				519,000
Supplier Prepayment	1,511,000				757,000
Other	4,936,000				2,621,000
Total	17,027,000				18,632,000
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(470,000)		(293,000)		(293,000)
Other comprehensive income (loss) before reclassifications	141,000		(205,000)
Amounts reclassified from accumulated other comprehensive income	14,000		14,000
Total other comprehensive income (loss)	155,000		(191,000)
Ending balance	(315,000)		(484,000)		(470,000)
Unrealized Gains and Losses on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	210,000		138,000		138,000
Other comprehensive income (loss) before reclassifications	147,000		(54,000)
Amounts reclassified from accumulated other comprehensive income	0		0
Total other comprehensive income (loss)	147,000		(54,000)
Ending balance	357,000		84,000
Defined Benefit Pension Items [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(780,000)		(560,000)		(560,000)
Other comprehensive income (loss) before reclassifications	0		0
Amounts reclassified from accumulated other comprehensive income	14,000	[1]	14,000	[2]
Total other comprehensive income (loss)	14,000		14,000
Ending balance	(766,000)		(546,000)
Foreign Currency Items [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	100,000		129,000		129,000
Other comprehensive income (loss) before reclassifications	(6,000)		(151,000)
Amounts reclassified from accumulated other comprehensive income	0		0
Total other comprehensive income (loss)	(6,000)		(151,000)
Ending balance	$ 94,000		$ (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, 2014.

[2] 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.