Stockholders' Equity and Non-controlling Interest - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Balance at the beginning of the period	$ (586)
Balance at the end of the period	(3,661)	$ (586)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Balance at the beginning of the period	(580)	128
Other comprehensive income (loss) before reclassifications	(3,073)	(706)
Amounts reclassified from accumulated other comprehensive income	0	0
Transactions with non-controlling interests	(8)	(2)
Balance at the end of the period	(3,661)	(580)
Unrealized Gain (Loss) on Available-for- Sale Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Balance at the beginning of the period	(6)	193
Other comprehensive income (loss) before reclassifications	6	0
Amounts reclassified from accumulated other comprehensive income	0	(199)
Transactions with non-controlling interests	0	0
Balance at the end of the period	0	(6)
Total Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Balance at the beginning of the period	(586)	321
Other comprehensive income (loss) before reclassifications	(3,067)	(706)
Amounts reclassified from accumulated other comprehensive income	0	(199)
Transactions with non-controlling interests	(8)	(2)
Balance at the end of the period	$ (3,661)	$ (586)