Segment Information (Restated) (Details)	3 Months Ended
Segment Information (Restated) (Details)	Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information [Line Items]
Total consolidated revenue	73.00%	74.00%
Revenue [Member]
Segment Reporting Information [Line Items]
Total consolidated revenue	100.00%	100.00%
Revenue [Member] \| U.S. [Member]
Segment Reporting Information [Line Items]
Total consolidated revenue	54.80%	63.40%
Revenue [Member] \| Canada [Member]
Segment Reporting Information [Line Items]
Total consolidated revenue	2.90%	5.10%
Revenue [Member] \| U.K. [Member]
Segment Reporting Information [Line Items]
Total consolidated revenue	24.40%	22.20%
Revenue [Member] \| Other foreign markets [Member]
Segment Reporting Information [Line Items]
Total consolidated revenue	17.90%	9.30%