Domestic and Foreign Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 23,281	$ 18,570	$ 44,033	$ 36,152
U.S. [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	18,016	15,733	35,624	30,163
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	1,234	1,011	2,080	2,013
Other International [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 4,031	$ 1,826	$ 6,329	$ 3,976