CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net income (loss)	$ 4,782	$ (127)
Adjustment to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	1,164	869
Loss on disposal of asset	25
Unit-based compensation	32	36
Amortization of debt issuance costs	12
Changes in assets and liabilities:
Accounts receivable	(1,011)	(519)
Prepaid expenses and other assets	(3,567)	252
Inventories	(451)	86
Accounts payable	1,458	(463)
Accrued liabilities	397	(1,333)
Net cash provided by (used in) operating activities	2,841	(1,199)
Cash flows from investing activities:
Investment in property, plant and equipment	(7,618)	(2,318)
Proceeds from disposal of asset	8
Investment in intangible assets	(6)
Net cash used in investing activities	(7,616)	(2,318)
Cash flows from financing activities:
Payments under capital leases	(7)	(6)
Payments under notes payable	(60)	(15)
Proceeds from pay down of promissory note related to membership units	3,052
Net cash provided by (used in) financing activities	2,985	(21)
Net decrease in cash	(1,790)	(3,538)
Cash at beginning of period	3,568	6,923
Cash at end of period	1,778	3,385
Non-cash activities
Capitalized depreciation in property, plant and equipment	156	167
Notes payable issued for property, plant and equipment	186
Accrued interest from notes receivable issued for membership units	57	70
Cash paid for:
Interest	$ 34	$ 8