CERTAIN FINANCIAL STATEMENT INFORMATION (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012	Dec. 31, 2012
Accounts receivable [Abstract]
Accounts receivable	$ 13,031			$ 16,699
Less: allowance for doubtful accounts	(136)			(96)
Total	12,895			16,603	[1]
Inventory [Abstract]
Finished goods	12,140			10,886
Raw materials	154			354
Inventory, net	12,294			11,240	[1]
Accrued liabilities [Abstract]
Payroll and related	2,073			2,166
Sales commissions	713			1,112
Warranty	330			406
Audit and legal services	236			368
Other	884			897
Total accrued liabilities	4,236			4,949	[1]
Warranty reserve [Abstract]
Warranty accrual, beginning of period	406		565
Changes in liability for pre-existing warranties	(38)		0
Deductions for warranty claims processed during the period	(38)		(64)
Warranty accrual, end of period	330		501
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive income (loss) as of December 31, 2012	(76)	[1]
Other comprehensive income (loss), net of tax	(775)
Accumulated other comprehensive income (loss) as of March 31, 2013	(851)
Foreign Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive income (loss) as of December 31, 2012	(96)
Other comprehensive income (loss), net of tax	(756)
Accumulated other comprehensive income (loss) as of March 31, 2013	(852)
Net Unrealized Gain (Loss) on Short-Term Investments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive income (loss) as of December 31, 2012	20
Other comprehensive income (loss), net of tax	(19)
Accumulated other comprehensive income (loss) as of March 31, 2013	$ 1

[1] Amounts have been derived from the December 31, 2012 audited consolidated financial statements.