CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Cash flows from operating activities:
Net (loss) income	$ (15,205)		$ (10,889)	$ (99,176)	$ 17,444
Adjustments to reconcile net (loss) income to cash provided by (used in) operating activities:
Stock based compensation				1,246	2,233
Depreciation, depletion, accretion and amortization				49,998	58,721
Amortization of coil tubing strings				359	1,003
Amortization of debt origination costs				577	163
Bad debt expense				1,679	266
(Gain) loss on disposal of property and equipment				(1,451)	176
Impairment of goodwill	0	$ 55,000	0	54,973	0	$ 33,664
Impairment of other long-lived assets				12,897	0
Deferred income taxes				931	(22,911)
Other				623	(199)
Changes in assets and liabilities:
Accounts receivable, net				7,782	(48,530)
Receivables from related parties				(19,793)	(26,236)
Inventories				4,651	(1,815)
Prepaid expenses and other assets				6,079	1,115
Accounts payable				(7,514)	7,366
Payables to related parties				(512)	650
Accrued expenses and other liabilities				(2,818)	(17,129)
Income taxes payable				(3,697)	(74,172)
Net cash provided by (used in) operating activities				6,834	(101,855)
Cash flows from investing activities:
Purchases of property and equipment				(4,348)	(30,085)
Purchases of property and equipment from related parties				(76)	(135)
Contributions to equity investee				0	(680)
Proceeds from disposal of property and equipment				2,544	2,465
Net cash used in investing activities				(1,880)	(28,435)
Cash flows from financing activities:
Borrowings from lines of credit				22,800	108,000
Repayments of lines of credit				(13,550)	(25,964)
Principal payments on financing leases and equipment financing notes				(914)	(992)
Dividends paid				0	(11,219)
Debt issuance costs				(1,000)	0
Net cash provided by financing activities				7,336	69,825
Effect of foreign exchange rate on cash				(137)	85
Net change in cash and cash equivalents				12,153	(60,380)
Cash and cash equivalents at beginning of period		$ 5,872		5,872	67,625	67,625
Cash and cash equivalents at end of period	$ 18,025		$ 7,245	18,025	7,245	$ 5,872
Supplemental disclosure of cash flow information:
Cash paid for interest				2,683	1,830
Cash (received) paid for income taxes				(6)	116,442
Supplemental disclosure of non-cash transactions:
Purchases of property and equipment included in accounts payable and accrued expenses				$ 2,780	$ 2,339