Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Assets
Cash and cash equivalents	$ 2,554	$ 2,533
Accounts receivable, net	19,702	18,056
Inventories	2,875	2,710
Assets held for sale	1,920	1,920
Prepaid expenses and other current assets	3,986	2,957
Total current assets	31,037	28,176
Property, plant and equipment, net	279,082	275,105
Other long-term assets, net	1,316	1,364
Total assets	311,435	304,645
Liabilities
Current portion of long-term debt	541	533
Accounts payable	14,661	11,627
Accrued liabilities	7,070	6,969
Total current liabilities	22,272	19,129
Long-term debt	59,490	49,278
Deferred income taxes, net	613	683
Other long-term liabilities	120	73
Total liabilities	82,495	69,163
Commitments and contingencies (Note 11)
Stockholders’ equity
Common stock, $0.01 par value, 100,000,000 shares authorized; 38,597,447 and 38,246,919 shares issued, respectively; and 38,252,765 and 37,985,225 shares outstanding, respectively	383	380
Additional paid-in capital	327,880	326,616
Accumulated deficit	(97,104)	(89,645)
Treasury stock, at cost, 344,682 and 261,694 shares, respectively	(2,219)	(1,869)
Total stockholders’ equity	228,940	235,482
Total liabilities and stockholders’ equity	$ 311,435	$ 304,645