Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Nov. 03, 2014	Mar. 30, 2012	Dec. 31, 2010
Income Taxes [Line Items]
Current state and foreign tax expense (benefit)	$ 600,000	$ 100,000
Federal income tax expense (benefit) from continuing operations			$ (400,000)
Current federal income tax benefit	15,758,000	144,000	6,352,000
Income tax (benefit) expense related to income from discontinued operations	15,800,000		6,500,000
State taxes	597,000	20,000	93,000
Deferred tax expense (benefit)	1,904,000	233,000	(4,564,000)
Increase (decrease) in valuation allowance			1,900,000
Foreign tax asset	6,000	(20,000)	(64,000)
Annual net operating loss carryforward, limitation on use	14,500,000	145,200,000
Operating loss carryforwards	208,600,000	208,600,000
Interest and penalties accrued	0	0
Interest and penalties expense	100,000		100,000
Unrecognized tax benefits, if recognized would impact the effective tax rate	300,000
Unrecognized tax benefit	257,000	0	0
Reserve related to certain state taxes	300,000
GovDelivery
Income Taxes [Line Items]
Annual net operating loss carryforward, limitation on use	1,000,000
Operating loss carryforwards						$ 2,800,000
VelocityEHS
Income Taxes [Line Items]
Annual net operating loss carryforward, limitation on use	25,600,000				$ 1,700,000
Operating loss carryforwards					$ 50,900,000
Annual limitation of future net operating loss carryforward	50,900,000
FolioDynamix
Income Taxes [Line Items]
Federal income tax expense (benefit) from continuing operations			(1,300,000)
Annual net operating loss carryforward, limitation on use				$ 8,900,000
Operating loss carryforwards				36,500,000
Annual limitations on net operating loss	6,400,000
Business combination, recognized identifiable assets acquired and liabilities assumed, intangible assets, other than goodwill				46,600,000
Business combination, recognized identifiable assets acquired and liabilities assumed, net deferred tax liabilities				$ 1,600,000
Deferred tax liability, state taxes			300,000
Textizen
Income Taxes [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, intangible assets, other than goodwill	600,000
Business combination, recognized identifiable assets acquired and liabilities assumed, net deferred tax liabilities	100,000
Deferred tax liability, state taxes		100,000
GovDelivery
Income Taxes [Line Items]
State taxes	3,400,000
VelocityEHS
Income Taxes [Line Items]
Deferred tax expense (benefit)			$ (3,100,000)
Bolt
Income Taxes [Line Items]
Foreign tax asset	$ 200,000	200,000
Investor Force
Income Taxes [Line Items]
Operating loss carryforwards		$ 18,800,000