Discontinued Operations and Assets and Liabilities Held for Sale - Major Classes of Assets and Liabilities (Detail) $ in Thousands	Dec. 31, 2016 USD ($)
Voyce Operations | Discontinued Operations, Disposed of by Sale
Carrying amounts of the major classes of assets included in discontinued operations:
Cash and cash equivalents	$ 60
Accounts receivable, net	8
Prepaid expenses and other current assets	153
Inventory	250
Total major classes of assets of the discontinued operations	471
Carrying amounts of the major classes of liabilities included in discontinued operations:
Accounts payable	536
Accrued expenses and other current liabilities	90
Accrued payroll and employee benefits	128
Total major classes of liabilities of the discontinued operations	754
Captira Analytical
Carrying amounts of the major classes of assets included in discontinued operations:
Total major classes of assets of the discontinued operations	575
Carrying amounts of the major classes of liabilities included in discontinued operations:
Total major classes of liabilities of the discontinued operations	858
Captira Analytical | Discontinued Operations, Held-for-sale
Carrying amounts of the major classes of assets included in discontinued operations:
Cash and cash equivalents	321
Accounts receivable, net	177
Prepaid expenses and other current assets	97
Property and equipment, net	247
Other assets	6
Write-down to fair value	(744)
Total major classes of assets of the discontinued operations	104
Carrying amounts of the major classes of liabilities included in discontinued operations:
Accounts payable	9
Accrued expenses and other current liabilities	15
Accrued payroll and employee benefits	80
Total major classes of liabilities of the discontinued operations	$ 104