Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Nov. 03, 2014	Mar. 30, 2012	Dec. 31, 2010
Income Taxes [Line Items]
Deferred tax asset, income tax expense	$ 20,400,000
Alternative minimum tax	1,400,000
Receivable for alternative minimum tax	1,100,000
Current state and foreign tax expense (benefit)	300,000
Current federal income tax benefit	11,800,000	$ 7,300,000
Income tax (benefit) expense related to income from discontinued operations	11,800,000	7,300,000
State taxes	0	0	$ 0
Deferred tax expense (benefit)	(1,045,000)	0	0
Foreign tax asset	0	0	0
Annual net operating loss carryforward, limitation on use	12,400,000
Total net operating loss carry forward limitation on use	74,500,000
Operating loss carryforwards	89,600,000
Interest and penalties accrued	0
Unrecognized tax benefits, if recognized would impact the effective tax rate		300,000
Unrecognized tax benefit			0
Reserve related to certain state taxes		300,000
Interest and penalties expense		100,000
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]
Operating loss carryforwards					$ 50,900,000
FolioDynamix
Income Taxes [Line Items]
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
Net operating losses used	9,000,000
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
Bolt
Income Taxes [Line Items]
Foreign tax asset		$ 200,000