Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Current [Abstract]
Federal	$ 12,000	$ 0
State	66,000	91,000
Current, Total	78,000	91,000
Deferred [Abstract]
Federal	225,000	218,000
State	41,000	40,000
Deferred, Total	266,000	258,000
Total income tax expense	344,000	349,000
Reconciliations of U.S. federal statutory rate to effective income tax rate [Abstract]
Tax provision at U.S. federal statutory rates (in hundredths)	35.00%	35.00%
State taxes (in hundredths)	5.90%	11.90%
State rate adjustment	8.80%	0.00%
Non-deductible permanent items (in hundredths)	0.70%	2.00%
Stock options (in hundredths)	3.40%	0.40%
Other (in hundredths)	(0.70%)	9.20%
Change in federal valuation allowance (in hundredths)	(33.20%)	(12.90%)
Effective income tax rate (in hundredths)	19.90%	45.60%
Deferred tax assets: [Abstract]
Allowance for doubtful accounts	160,000	211,000
Accrued liabilities	248,000	269,000
Net operating loss carry-forwards	40,350,000	40,845,000
Fixed assets	144,000	134,000
Intangible assets	1,991,000	2,229,000
Share-based compensation expense	944,000	696,000
Deferred revenue	2,000	4,000
Other	44,000	69,000
Total gross deferred tax assets	43,883,000	44,457,000
Valuation allowance	(43,883,000)	(44,457,000)
Deferred tax liabilities [Abstract]
Tax deductible goodwill	(620,000)	(354,000)
Total gross deferred tax liabilities	(620,000)	(354,000)
Net deferred income taxes	(620,000)	(354,000)
Operating Loss Carryforwards [Line Items]
Annual limitation amount of net operating losses	9,900,000
Valuation allowance of subsidiary	4,100,000
Reconciliation of beginning and ending amount of unrecognized tax benefits [Roll Forward]
Balance at January 1	500,000,000
Additions based on tax positions related to the current year	0	0
Additions based on tax positions related to prior years	136,000,000	0
Reductions based on tax positions related to prior years and settlements	0	0
Reductions based on the lapse of the statutes of limitations	0	0
Balance at December 31	636,000,000	500,000,000
Federal [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carry-forwards	106,400,000
Net operating loss carry forwards incurred by subsidiary	10,800,000
Net operating losses of subsidiary pertaining to stock options deductions	13,500,000
Valuation allowance of subsidiary to be credited to stockholders' equity	4,700,000
Net operating losses pertaining to deductions from stock-based compensation	600,000
Research and development tax credit carry forwards	300,000
Federal [Member] | 2021 [Member]
Operating Loss Carryforwards [Line Items]
Net operating losses subject to annual limitation	24,400,000
Federal [Member] | 2022 [Member]
Operating Loss Carryforwards [Line Items]
Net operating losses subject to annual limitation	1,700,000
Federal [Member] | 2023 [Member]
Operating Loss Carryforwards [Line Items]
Net operating losses subject to annual limitation	0
Federal [Member] | 2024 [Member]
Operating Loss Carryforwards [Line Items]
Net operating losses subject to annual limitation	4,100,000
Federal [Member] | 2025 [Member]
Operating Loss Carryforwards [Line Items]
Net operating losses subject to annual limitation	7,700,000
Federal [Member] | 2026 [Member]
Operating Loss Carryforwards [Line Items]
Net operating losses subject to annual limitation	26,400,000
Federal [Member] | 2027 [Member]
Operating Loss Carryforwards [Line Items]
Net operating losses subject to annual limitation	15,500,000
Federal [Member] | 2028 [Member]
Operating Loss Carryforwards [Line Items]
Net operating losses subject to annual limitation	5,100,000
Federal [Member] | 2029 [Member]
Operating Loss Carryforwards [Line Items]
Net operating losses subject to annual limitation	8,600,000
Federal [Member] | 2030 [Member]
Operating Loss Carryforwards [Line Items]
Net operating losses subject to annual limitation	11,600,000
Federal [Member] | 2031 [Member]
Operating Loss Carryforwards [Line Items]
Net operating losses subject to annual limitation	1,300,000
State [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carry-forwards	65,900,000
Net operating losses subject to annual limitation	6,200,000
Net operating loss carry forwards incurred by subsidiary	5,000,000
Net operating losses of subsidiary pertaining to stock options deductions	8,500,000
Valuation allowance of subsidiary to be credited to stockholders' equity	500,000
Net operating losses pertaining to deductions from stock-based compensation	100,000
Research and development tax credit carry forwards	200,000
State [Member] | 2013 [Member]
Operating Loss Carryforwards [Line Items]
Net operating losses subject to annual limitation	3,100,000
State [Member] | 2014 [Member]
Operating Loss Carryforwards [Line Items]
Net operating losses subject to annual limitation	4,600,000
State [Member] | 2015 [Member]
Operating Loss Carryforwards [Line Items]
Net operating losses subject to annual limitation	6,600,000
State [Member] | 2016 [Member]
Operating Loss Carryforwards [Line Items]
Net operating losses subject to annual limitation	21,300,000
State [Member] | 2017 [Member]
Operating Loss Carryforwards [Line Items]
Net operating losses subject to annual limitation	3,200,000
State [Member] | 2028 [Member]
Operating Loss Carryforwards [Line Items]
Net operating losses subject to annual limitation	2,700,000
State [Member] | 2029 [Member]
Operating Loss Carryforwards [Line Items]
Net operating losses subject to annual limitation	5,800,000
State [Member] | 2030 [Member]
Operating Loss Carryforwards [Line Items]
Net operating losses subject to annual limitation	11,000,000
State [Member] | 2031 [Member]
Operating Loss Carryforwards [Line Items]
Net operating losses subject to annual limitation	$ 1,400,000