Summary of Significant Accounting Policies (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2012 Segment Customer ReportableUnit	Dec. 31, 2011	Dec. 31, 2010	Jun. 30, 2012
Summary of significant accounting policies (Textual) [Abstract]
Diluted computation increased	1,700,000	3,600,000	1,500,000
Summary of Significant Accounting Policies (Additional Textual) [Abstract]
Maturity period of cash and cash equivalent	three months or less
Cash equivalent balances consisted in money market funds	$ 4,100,000	$ 4,100,000
Property and equipment estimated useful lives range	three to ten years
Estimated economic life of product	Exceed three years
Capitalized amount in product development cost	235,000	267,000
Amortization Expense	156,000	39,000	0
Non-cash operating expense charge recorded as lease abandonment accrual		2,200,000
Long term lease abandonment accrual	1,200,000
Short-term portion of lease abandonment accrual	580,000	580,000
Number of operating segment for business activities	1
Number of reporting units for goodwill allocation	3
Standard payment terms to customers	30 days
Losses recognized on fixed price contracts	0	0	0
Maintenance fee revenue recognition period	1 year
Purchase of software and intellectual property				3,250,000
Amount of license consideration, subsequent development and training services				3,250,000
License related revenue	788,000
Software modules contract expiration date	2011-06
Software modules contract expected revenue recognized after expiration	0
Share-based awards outstanding under equity plans	4,100,000	3,700,000	2,773,165
Insurance limit for eligible accounts	0
Insurance coverage per depositor	250,000
Cash and equivalents in interest bearing accounts	14,100,000
Excess customer balance from receivables	$ 0	$ 0
Customer balances excess percentage of total receivables balance	10.00%	10.00%
Customer threshold percentage of total receivables or total service revenue	10.00%	10.00%	10.00%
Aggregate service revenue	14.80%	11.10%	15.30%
Number of largest customers	5
Stock option [Member]
Summary of significant accounting policies (Textual) [Abstract]
Diluted computation increased			34,000
Minimum [Member]
Summary of significant accounting policies (Textual) [Abstract]
Property and equipment estimated useful lives	3 years
Acquired intangible assets useful lives	1 year 6 months
Warranty period on fixed-price contracts	30 days
Maximum [Member]
Summary of significant accounting policies (Textual) [Abstract]
Property and equipment estimated useful lives	10 years
Acquired intangible assets useful lives	7 years 6 months
Warranty period on fixed-price contracts	60 days