CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017		Jun. 30, 2016
Cash flows from operating activities:
Net income (loss)	$ 5,844	[1]	$ (931)
Adjustment to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	2,534	[1]	1,780
Loss on disposal of asset	409
Unit-based compensation	677		72
Amortization of debt issuance costs	24
Amortization of prepaid expenses and other assets	462
Deferred income tax expense	473
Other	(9)
Changes in assets and liabilities:
Accounts receivable	(2,621)		(593)
Prepaid expenses and other assets	(5,451)		31
Inventories	(4,348)		593
Accounts payable	2,142		(435)
Accrued liabilities	1,409		(1,066)
Net cash provided by (used in) operating activities	1,545		(549)
Cash flows from investing activities:
Investment in property, plant and equipment	(21,482)		(3,469)
Investment in intangible assets	(28)
Net cash used in investing activities	(21,510)		(3,469)
Cash flows from financing activities:
Payments under capital leases	(13)
Proceeds from capital leases			71
Payments under notes payable	(451)		13
Proceeds from borrowings under the credit facility	3,000
Repayment of credit facility	(5,500)
Proceeds from pay down of promissory note related to membership units	4,303
Payments related to debt issuance costs	(111)
Proceeds from issuance of Class A common stock sold in initial public offering, net of offering costs	111,075
Distributions paid to unitholders	(25,818)
Net cash provided by financing activities	86,485		84
Net increase (decrease) in cash	66,520		(3,934)
Cash at beginning of period	3,568		6,923
Cash at end of period	70,088		2,989
Non-cash activities
Capitalized depreciation in property, plant and equipment	320		342
Notes payable issued for property, plant and equipment			72
Accrued interest from notes receivable issued for membership units	128		208
Cash paid for:
Interest	$ 90		$ 14

[1] Represents earnings per share of Class A common stock and weighted-average shares of Class A common stock outstanding for the period from May 17, 2017 through June 30, 2017, the period following the reorganization transactions and IPO. See Note 9.