Summary of Significant Accounting Policies Significant Accounting Policies (Details) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Summary of Significant Accounting Policies [Line Items]
Internal-use software development costs capitalized	$ 0	$ 118,000
Tangible Asset Impairment Charges	0
Short-term Investments	34,951,000		$ 2,500,000
Treasury money market funds, at fair value	95,300,000		$ 127,200,000
Line of Credit Facility, Amount Outstanding	0
Line of Credit Facility, Maximum Borrowing Capacity	50,000,000
Unamortized Debt Issuance Expense	100,000
Income Tax Expense (Benefit)	$ 158,000	110,000
Effective income tax rate	(1.00%)
Cloud-based product offerings [Member]
Summary of Significant Accounting Policies [Line Items]
Internal-use software development costs capitalized	$ 0	$ 118,000
Capitalized Computer Software, Amortization	$ 0
Minimum [Member]
Summary of Significant Accounting Policies [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	1 year
Maximum [Member]
Summary of Significant Accounting Policies [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years