CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net (loss) income	$ (2,327)	$ 16,294
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization	7,653	7,298
Amortization of deferred loan costs	269	269
Stock-based compensation	2,182	3,649
Provision (recovery) for bad debts	46	24
Loss on disposition of assets	5
Changes in operating assets and liabilities:
Receivables	(339)	312
Income taxes	(1,043)	2,502
Inventories	(259)	(8)
Prepaid expenses	2,823	1,059
Right of use asset, net		7
Accounts payable	(10,446)	319
Accrued expenses	(8,581)	(73)
Net cash (used in) provided by operating activities	(10,017)	31,652
Cash flows from investing activities:
Proceeds from sale of assets	24
Change in construction payable	(4,428)	1,650
Acquisition of property and equipment	(18,164)	(75,248)
Net cash used in investing activities	(22,568)	(73,598)
Cash flows from financing activities:
Net exercise of stock options	(634)
Principal payments on long-term debt	(5,000)
Long-term debt borrowings	16,000	38,010
Net cash provided by financing activities	10,366	38,010
Change in cash and cash equivalents	(22,219)	(3,936)
Cash and cash equivalents at beginning of period	60,539	30,462
Cash and cash equivalents at end of period	$ 38,320	$ 26,526