Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities
Net income	$ 10,323	$ 375
Adjustments to reconcile net income to cash flow from operating activities
Depreciation, amortization and accretion	4,586	8,120
Provision for excess and obsolete inventory	497	180
Stock-based compensation	407	277
Gain on sale of assets	(5,828)
Other	513	853
Increase (decrease) in cash from operating assets and liabilities
Accounts receivable	(2,634)	2,761
Inventory	(304)	(953)
Other current assets	(1,042)	(1,021)
Income taxes	(235)	87
Accounts payable	2,070	(771)
Accrued expenses and other liabilities	(4,573)	5,249
Cash provided by operating activities	3,780	15,157
Cash flows from investing activities
Proceeds from sale of assets	9,000
Capital expenditures	(1,652)	(3,498)
Redemption of certificate of deposit-restricted	74
Cash provided by (used in) investing activities	7,422	(3,498)
Cash flows from financing activities
Payments on long-term debt	(933)	(18)
Payments for offering costs		(441)
Other	(11)
Cash used in financing activities	(944)	(459)
Effect of foreign exchange rate on cash	26	(196)
Increase in cash and cash equivalents	10,284	11,004
Cash and cash equivalents, beginning of period	28,596	19,739
Cash and cash equivalents, end of period	38,880	30,743
Supplemental disclosure of cash flow information
Interest paid	6,422	59
Income taxes paid/(refunded), net	$ 199	$ (59)