Subsequent Events (Details) - Line of Credit - USD ($)	Aug. 25, 2017	Jan. 31, 2017
Sale of Maintech or Receipt of IRS Refund
Debt Instrument [Line Items]
Minimum global liquidity covenant		$ 25,000,000.0
Subsequent Event
Debt Instrument [Line Items]
Minimum global liquidity covenant	$ 5,000,000
Line of credit facility, minimum borrowing block	$ 10,000,000