Short-term and long-term invesmtents (Tables)

12 Months Ended

Dec. 31, 2018

Investments, Debt and Equity Securities [Abstract]

Schedule of Investments

The Company’s investments in these short-term and long-term debt and equity investments consist of the following:

	December 31, 2018						December 31, 2017
	Debt securities		Equity securities		Total		Debt securities		Equity securities		Total
Certificates of deposit and other time deposits	$	2,235	$	—	$	2,235	$	31,630	$	—	$	31,630
Investments in mutual funds and common stock	—		36,124		36,124		—		38,895		38,895
	$	2,235	$	36,124	$	38,359	$	31,630	$	38,895	$	70,525
Short-term investments	$	2,235	$	700	$	2,935	$	31,630	$	1,200	$	32,830
Long-term investments	—		35,424		35,424		—		37,695		37,695
	$	2,235	$	36,124	$	38,359	$	31,630	$	38,895	$	70,525