CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income	$ 16,294	$ 15,980
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	7,298	7,430
Amortization of deferred loan costs	269	269
Stock-based compensation	3,649	3,012
Provisions (recoveries) for bad debts	24	(19)
Loss on disposition of assets		4
Changes in operating assets and liabilities:
Receivables	312	1,941
Income taxes	2,502	1,548
Inventories	(8)	35
Prepaid expenses	1,059	434
Right of use asset, net	7
Accounts payable	319	(773)
Accrued expenses	(73)	(1,392)
Net cash provided by operating activities	31,652	28,469
Cash flows from investing activities:
Change in construction payable	1,650	13,562
Acquisition of property and equipment	(75,248)	(54,819)
Net cash used in investing activities	(73,598)	(41,257)
Cash flows from financing activities:
Long-term debt borrowings	38,010	10,770
Net cash provided by financing activities	38,010	10,770
Change in cash	(3,936)	(2,018)
Cash and cash equivalents at beginning of period	30,462	29,151
Cash and cash equivalents at end of period	26,526	27,133
Supplemental disclosure of cash flow information:
Cash paid for income taxes	$ 1,558	2,250
Adjustment to beginning retained earnings for accounting changes in accordance with the new revenue recognition standard
Accrued expenses		$ 4,858