Supplemental Cash Flow Information (Tables)

3 Months Ended

Mar. 31, 2017

Supplemental Cash Flow Elements [Abstract]

Components of supplemental cash flow information

Supplemental cash flow information is as follows (in thousands):

	Three months ended March 31,
	2017		2016
Supplemental non-cash investing and financing activities:
Value of common stock issued in payment of accrued liability	$	188	$	—
Exercise of stock options by common stock surrender	7		—
Supplemental cash payment information:
Interest paid	$	553	$	382
Income taxes paid, net of refunds	114		2,264