Pending Transaction Activity - (Narrative) (Details) - Guidehouse LLP [Member] - USD ($)	6 Months Ended
	Jun. 30, 2019	Aug. 02, 2019
Subsequent Event [Member]
Subsequent Event [Line Items]
Common stock, par value		$ 0.001
Business acquisition, share price		$ 28.00
Merger agreement termination fee payable		$ 30,900,000.00
Merger agreement termination fee receivable		$ 67,500,000.00
Isaac Merger Sub, Inc. [Member]
Subsequent Event [Line Items]
Merger agreement date	Aug. 02, 2019