Year Ended December 31, | 2013 | 2012 | 2011 | ||||||||
(Increase) decrease in trade accounts receivable | $ | 28 | $ | (33 | ) | $ | (562 | ) | |||
(Increase) decrease in inventories | (105 | ) | (286 | ) | (447 | ) | |||||
(Increase) decrease in prepaid expenses and other assets | (163 | ) | (29 | ) | (350 | ) | |||||
Increase (decrease) in accounts payable and accrued expenses | (158 | ) | (556 | ) | 63 | ||||||
Increase (decrease) in accrued taxes | 22 | 770 | (132 | ) | |||||||
Increase (decrease) in other liabilities | (556 | ) | (946 | ) | (465 | ) | |||||
Net change in operating assets and liabilities | $ | (932 | ) | $ | (1,080 | ) | $ | (1,893 | ) |