SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)	12 Months Ended
	Dec. 31, 2013 Bank	Dec. 31, 2012	Dec. 31, 2011
Cash, Cash Equivalents, Marketable Investments, and Long-Term Investments [Abstract]
Long term investment marketable period	1 year
Impairment of Marketable Investments [Abstract]
Other than temporary impairment losses	$ 0	$ 0	$ 0
Concentration of Credit Risk and Other Risks and Uncertainties [Abstract]
Number of major banks used by entity	3
Average maturity period of interest rate of auction securities	18 months
Revenue from external customers, domestic	42.00%	41.00%	39.00%
Revenue from external customers, international	58.00%	59.00%	61.00%
Inventory [Abstract]
Inventories estimated useful lives	2 years
Property, Plant and Equipment [Line Items]
Depreciation expense	602,000	436,000	446,000
Goodwill and Intangible Assets [Line Items]
Impairment charge		0
Warranty Obligations [Abstract]
Standard warranty period	1 year
Revenue Recognition [Abstract]
Service revenue	17,689,000	17,220,000	13,411,000
Advertising Costs [Abstract]
Advertising Expense	$ 1,600,000	$ 1,300,000	$ 1,300,000
Income Taxes [Abstract]
Uncertain income tax position minimum rate (in hundredths)	50.00%
Segments [Abstract]
Long-lived assets maintained in United States (in hundredths)	83.00%	85.00%
Minimum [Member]
Goodwill and Intangible Assets [Line Items]
Intangible asset, useful life	11 months
Maximum [Member]
Goodwill and Intangible Assets [Line Items]
Intangible asset, useful life	10 years
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment estimated useful lives	Lesser of useful life or term of lease
Office Equipment and Furniture [Member]
Property, Plant and Equipment [Line Items]
Property and equipment estimated useful lives	3 years
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment estimated useful lives	3 years