Segmented Information Segment (loss) income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Total segment operating income	$ 2,277	$ 1,557	$ 4,722	$ 3,061
Net investment income (loss)	18	(1,347)	(613)	(1,163)
Net realized (losses) gains	(1)	(1)	9	(1)
(Loss) gain on change in fair value of equity investments	(248)	0	614	0
Interest expense not allocated to segments	1,519	1,216	2,905	2,375
Other income and expenses not allocated to segments, net	(2,248)	(2,907)	(4,642)	(4,983)
Amortization of intangible assets	271	289	543	580
Contingent consideration benefit	0	212	0	212
Loss on change in fair value of debt	(142)	(2,702)	(1,061)	(4,591)
Equity in net (loss) income of investee	(385)	(145)	(284)	2,240
Loss from continuing operations before income tax expense	(2,519)	(6,838)	(4,703)	(8,180)
Income tax expense	187	1,251	438	1,516
Loss from continuing operations	(2,706)	(8,089)	(5,141)	(9,696)
Reportable Subsegments [Member]
Segment Reporting Information [Line Items]
Total segment operating income	1,659	685	3,230	1,271
Reportable Legal Entities [Member]
Segment Reporting Information [Line Items]
Total segment operating income	$ 618	$ 872	$ 1,492	$ 1,790