v3.19.1
CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Adjustments to reconcile net income (loss) to net cash provided by operating activities:      
Net Income (Loss) $ 11,783 $ (22,567) $ (64,183)
Depreciation and depletion [1] 32,215 33,209 40,913
Accretion of asset retirement obligation 1,668 1,558 1,768
Amortization of deferred financing costs 732 1,778 2,113
Stock-based compensation 4,179 3,622 3,598
Reserve for obsolescence 15 1,073 349
Allowance for doubtful accounts 100 865  
(Gain) loss on disposal of assets (87) 1,830 262
Lower of cost or net realizable value inventory adjustments 1,711 6,379 20,374
Other (19)   481
Changes in operating assets and liabilities:      
Trade accounts receivable, net (7,484) (6,870) 4,419
Other receivables, net 165 (270) 977
Refundable income taxes 2,663 (1,284) (1,163)
Inventory, net (67) (1,263) (16,771)
Other current assets 1,762 (3,207) 4,797
Accounts payable, accrued liabilities and accrued employee compensation and benefits 1,740 1,738 (11,222)
Income taxes payable 914    
Other liabilities 12,247 102 (1,453)
Net cash provided by (used in) operating activities 64,237 16,693 (14,741)
Cash Flows from Investing Activities:      
Additions to property, plant, equipment, and mineral properties (16,891) (13,505) (17,892)
Proceeds from sale of property, plant, equipment, and mineral properties 110 5,651  
Purchases of investments     (10,325)
Proceeds from sale of investments     60,727
Net cash (used in) provided by investing activities (16,781) (7,854) 32,510
Cash Flows from Financing Activities:      
Issuance of common stock, net of transaction expense   59,130  
Repayments of long-term debt (10,000) (75,000) (15,000)
Debt prepayment costs (402) (3,001) 0
Proceeds from from short-term borrowings on credit facility 13,500 22,000  
Repayments of short-term borrowings on credit facility (17,400) (18,100)  
Debt issuance costs (210) (129) (3,910)
Employee tax withholding paid for restricted stock upon vesting (903) (781) (173)
Proceeds from exercise of stock options 114 121  
Net cash used in financing activities (15,301) (15,760) (19,083)
Net Change in Cash, Cash Equivalents, and Restricted Cash 32,155 (6,921) (1,314)
Cash, Cash Equivalents, and Restricted Cash, beginning of period 1,549 8,470 9,784
Cash, Cash Equivalents, and Restricted Cash, end of period 33,704 1,549 8,470
Supplemental disclosure of cash flow information      
Interest, net of $0.1 million, $0.1 million, and $0.4 million of capitalized interest 3,470 11,639 8,966
Income taxes (3,469) (1,499) (100)
Accrued purchases for property, plant, equipment, mineral properties, and development costs $ 1,082 $ 4,068 $ 793
[1] Depreciation and depletion incurred for potash and Trio® excludes depreciation and depletion absorbed in or (relieved from) inventory.