Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 92,919	$ 113,401
Accounts receivable, net	43,529	43,753
Inventory	29,180	33,019
Other current assets	7,283	5,242
Total current assets	172,911	195,415
Property, plant and equipment, net	116,497
Property, plant and equipment, net		107,888
Intangibles, net	7,336	9,133
Goodwill	15,714	15,714
Deferred tax assets, net	71,834	81,449
Other long-term assets	21,627	30,232
Total assets	405,919	439,831
Current liabilities
Current portion of long-term debt and other borrowings	10,143	2,750
Accounts payable	18,608	17,955
Accrued expenses and other liabilities	37,360	32,050
Total current liabilities	66,111	52,755
Asset retirement obligations	12,883	11,572
Long-term debt, net and other borrowings	183,927	263,709
Other long-term liabilities	28,397	40,793
Total liabilities	291,318	368,829
Commitments and contingencies (see Note 15)
Stockholders’ equity
Preferred stock ($0.01 par value, 25,000 shares authorized; no shares issued and outstanding)	0	0
Common stock ($0.01 par value, 250,000 shares authorized; 39,251 and 38,466 shares issued and outstanding, respectively)	393	385
Additional paid-in capital	251,641	239,865
Accumulated deficit	(136,473)	(168,140)
Accumulated other comprehensive loss	(960)	(1,108)
Total stockholders’ equity	114,601	71,002
Total liabilities and stockholders’ equity	$ 405,919	$ 439,831