CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
CURRENT ASSETS:
Cash and cash equivalents	$ 23,949	$ 133,596
Accounts receivable - net of allowance for doubtful accounts of $443 and $552, respectively	199,656	115,179
Inventories	6,184	4,713
Prepaid expenses	5,123	4,608
Other current assets	748	6,684
Total current assets	235,660	264,780
PROPERTY AND EQUIPMENT - Net of accumulated depreciation	470,910	263,862
OTHER NONCURRENT ASSETS:
Goodwill	9,425	9,425
Intangible assets - net of amortization	301	589
Deferred revenue rebate - net of amortization	615	2,462
Other noncurrent assets	2,121	304
Total other noncurrent assets	12,462	12,780
TOTAL ASSETS	719,032	541,422
CURRENT LIABILITIES:
Accounts payable	211,149	129,093
Accrued liabilities	16,607	13,619
Current portion of long-term debt	15,764	16,920
Accrued interest payable	76	109
Total current liabilities	243,596	159,741
DEFERRED INCOME TAXES	4,881	1,148
LONG-TERM DEBT	57,178	159,407
OTHER LONG-TERM LIABILITIES	125	117
Total liabilities	305,780	320,413
COMMITMENTS AND CONTINGENCIES (Note 17)
SHAREHOLDERS’ EQUITY:
Preferred stock, $0.001 par value, 30,000,000 shares authorized, 0 and 16,999,990 shares issued, respectively	0	17
Preferred stock, additional paid-in capital	0	162,494
Common stock, $0.001 par value, 200,000,000 shares authorized, 83,039,854 and 52,627,652 shares issued, respectively	83	53
Additional paid-in capital	607,466	265,355
Accumulated deficit	(194,297)	(206,910)
Total shareholders’ equity	413,252	221,009
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 719,032	$ 541,422