Basis of Presentation and Significant Accounting Policies (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Principles of Consolidation [Abstract]
Ownership percentage of common stock (in hundredths)		63.00%
Cash and Cash Equivalents [Abstract]
Cash and cash equivalents, including restricted cash	$ 35,875	$ 19,729	$ 35,875
Restricted cash	813	392	813	707	1,647
Other Current Assets [Abstract]
Revenue recognized in excess of billings, net of reserves of 2,249 and $1,763, respectively	18,812	12,069	18,812
Equity investment	2,016	0	2,016
Other non-trade receivables	793	426	793
Other current assets	0	136	0
Other current assets, Total	21,621	12,631	21,621
Movement in Reserves for Revenue in Excess of Billings [Roll Forward]
Net loss attributable to changes of revenues in excess of billings	1,308		14,304
Net income loss attributable to changes of revenues in excess of billings reserve account per share (in dollars per share)			$ 0.01
Property and Equipment [Line Items]
Depreciation expense		3,394	3,752	3,955
Intangible Assets and Goodwill [Abstract]
Impairment of goodwill		0
Other Current Liabilities [Abstract]
Customer deposits	3,409	2,697	3,409
Acquisition obligation	2,815	1,967	2,815
Accrued taxes	998	918	998
Leases line facility	897	0	897
Leases payable	83	0	83
Other liabilities	4,404	2,623	4,404
Other current liabilities	12,606	8,205	12,606
Acquisition obligation non-current	2,041	273	2,041
Acquisition obligation due in 2014		1,967
Acquisition obligation due in 2015		273
Revenue Recognition [Abstract]
Period for recognition of deferred software costs		1 year
Notice period for termination of contracts		30 days
Computer Equipment [Member]
Property and Equipment [Line Items]
Useful life of property and equipment		3 years
Office Equipment [Member] | Minimum [Member]
Property and Equipment [Line Items]
Useful life of property and equipment		3 years
Office Equipment [Member] | Maximum [Member]
Property and Equipment [Line Items]
Useful life of property and equipment		5 years
Reserve for Revenue In Excess of Billings [Member]
Movement in Reserves for Revenue in Excess of Billings [Roll Forward]
Balance at Beginning of Period		1,763	235
Net Additions Charged to Revenue and Expenses		1,279	1,528
Deductions		(793)	0
Balance at End of Period	$ 1,763	$ 2,249	$ 1,763