Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Components of loss before income taxes [Abstract]
United States	$ 10,513,000	$ (5,975,000)	$ (18,455,000)
Foreign	608,000	630,000	457,000
Total	11,121,000	(5,345,000)	(17,998,000)
Gain (loss) from discontinued operations, before income taxes	0	18,000	(90,000)
Gain (loss) from continuing operations, before income taxes	11,121,000	(5,327,000)	(18,088,000)
Current [Abstract]
Federal	0	0	0
State	132,000	54,000	99,000
Foreign	221,000	94,000	53,000
Total current	353,000	148,000	152,000
Deferred [Abstract]
Federal	265,000	265,000	324,000
State	24,000	28,000	13,000
Foreign	130,000	(234,000)	(88,000)
Total provision for income tax	772,000	208,000	401,000
Reconciliation of federal statutory income tax rate to effective income tax rate [Abstract]
Provision at Federal statutory rate	3,900,000	(1,865,000)	(6,330,000)
State taxes	156,000	82,000	111,000
Permanent differences/other	520,000	375,000	416,000
Stock-based compensation	1,113,000	178,000	568,000
Federal valuation allowance (used) provided	(4,917,000)	1,438,000	5,636,000
Total provision for income tax	772,000	208,000	401,000
Deferred tax Assets [Abstract]
Fixed assets	187,000	279,000
Deferred revenue	14,000	196,000
Accruals and reserves	498,000	303,000
Stock Options	3,570,000	5,475,000
Net operating loss carryforwards	43,562,000	47,713,000
Federal and State tax credits	3,169,000	3,099,000
Foreign credits	197,000	320,000
Intangible assets	986,000	701,000
Gross deferred tax assets	52,183,000	58,086,000
Valuation allowance	(51,726,000)	(57,455,000)
Total deferred tax assets	457,000	631,000
Deferred tax liabilities [Abstract]
Intangible assets	(1,016,000)	(742,000)
Total deferred tax liabilities	(1,016,000)	(742,000)
Net deferred tax assets (liabilities)	(559,000)	(111,000)
Valuation Allowance [Abstract]
Increase (decrease) in net valuation allowance	(5,700,000)	776,000	5,600,000
Valuation allowance on stock option exercises	4,800,000
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Balance at beginning of year	3,637,000	3,210,000	3,776,000
Increase related to prior year tax positions	98,000	507,000	0
Decrease related to prior year tax positions	(1,349,000)	0	(494,000)
Increase related to current year tax positions	162,000	18,000	55,000
Settlements with tax authorities	0	0	0
Decrease related to lapse of statute of limitations	(46,000)	(98,000)	(127,000)
Balance at end of year	2,502,000	3,637,000	3,210,000
Unrecognized tax benefits that would impact effective tax rate	500,000	500,000
Cumulative undistributed earnings of foreign subsidiaries	749,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]
Income tax penalties and interest accrued	111,000	80,000	91,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense [Abstract]
Income tax penalties and interest expense	56,000
Recognized tax benefits where significant change is reasonably possible in next 12 months	25,000
Federal [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	119,500,000
Federal [Member] | Research and Development [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforward	2,800,000
State [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	75,900,000
State [Member] | Research and Development [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforward	2,400,000
Federal Stock Options Deductions [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 23,000,000